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  • 1
    ISSN: 1432-2072
    Keywords: Lysergic Acid Diethylamide or LSD ; Methylphenidate or Ritalin ; Chlordiazepoxide or Librium ; Psychopharmacology ; Alcoholism and Drug Therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Through the retrospective use of the 156 item DWM Card Sort, the experiences from a single intravenous dose of 200 mcg of LSD, 75 mg of methylphenidate (Ritalin) and 75 mg of chlordiazepoxide (Librium) were compared in a population of 99 chronic male alcoholics treated in an “LSD setting” in a double-blind study. Surprisingly, 96 of the 156 items proved significantly different among the 3 groups. LSD was unique in producing Sensory and Perceptual Distortions (including Hallucinations or Illusions), and Mystical, Religious or Paranormal Sensations. However, contrary to expectation, LSD did not uniquely produce the traditional “therapeutic” experience, but appeared to be surpassed in that area by methylphenidate. Both drugs also produced some anxiety, while chlordiazepoxide produced relaxation, and enhanced music appreciation.
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 14 (1969), S. 18-22 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Animal Behaviour ; Mice
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Mice were stained with pulverized charcoal and the resulting grooming behaviour observed. From 119 controls, the typical patterns indicated a late cleaning of the tail, the sacrum and the region between the ears. The following substances were tested: Imipramine, Desipramine, Trimeprimine, Amitriptyline, Nortriptyline, Chlordiazepoxide, Iproniazide, d-Amphetamine, Chlorpromazine, Haloperidol, Acetylsalicylic acid, Metronidazole. Of these Amitriptyline, Chlorpromazine, Haloperidol and Metronidazole were effective in doses less than 1/10 of LD 5.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 14 (1969), S. 62-73 
    ISSN: 1432-2072
    Keywords: Amphetamine ; Hallucinogens ; Drug Addiction ; Psychopharmacology ; Phenylethylamines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The amphetamine analog, 2,5-dimethoxy-4-methylamphetamine (DOM), was studied in 18 volunteer subjects given single doses ranging from 2 to 14 mg. The former was a threshold dose, with definite psychotomimetic effects being evident from doses over 5 mg. The clinical syndrome greatly resembled that of the LSD-mescaline-psilocybin series of drugs, including its time-course. Somewhat more sedation was produced by DOM than would have been expected from the others, despite concomitant evidence of peripheral sympathetic stimulation. Just as with the other drugs, DOM increased plasma free fatty acids, decreased phosphorus and creatinine clearance, decreased circulating eosinophils and had little effect on catecholamine excretion. Performance of psychometric tests was impaired. Chlorpromazine treatment concurrently was found to attenuate the reaction. Tolerance rapidly developed when the drug was used chronically by patients.
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  • 4
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Doxepin ; Diazepam ; Anti-Anxiety ; Antidepressant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Doxepin and diazepam were evaluated for therapeutic effectiveness in a double blind study carried out with 69 primarily anxious neurotic outpatients attending either a municipal hospital clinic or a general practitioner's office. Doxepin produced more clinical improvement than diazepam in several questionnaire clusters measuring depressive symptomatology, but not in clusters measuring anxious symptomatology. According to several outcome criteria, doxepin tended to produce more clinical improvement in general practice than in clinic patients, while diazepam produced either equal improvement in both populations or slightly more improvement in the clinic. Possibly contributing to the present results are low daily dosage of diazepam, differential pharmacological drug effects, population differences in levels of anxiety and depression, and differences in population characteristics, primarily as related to social class.
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  • 5
    ISSN: 1432-2072
    Keywords: Nicotine ; Antimuscarinic Drugs ; Ganglion-Blocking Drugs ; Operant Conditioning ; Psychopharmacology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effects of nicotine on bar-pressing behaviour in the rat are blocked by mecamylamine. The depressant phase of the effect is blocked by atropine, supporting the conclusion that this depression is mediated by released acetylcholine. The quaternary compounds chlorisondamine and atropine methylnitrate also antagonise the behavioural effects of nicotine but the doses required for this are far in excess of those which are effective peripherally, suggesting that the sites of interaction are central.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 15 (1969), S. 1-8 
    ISSN: 1432-2072
    Keywords: Cannabis (Marihuana) ; Lysergic Acid Diethylamide ; Hallucinogens (Psychopharmacology) ; Visual Perception ; Psychopharmacology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Four pigeons were trained on a visual discrimination task which required conditional responding along the independent dimensions of form and color. High doses of Cannabis sativa (marihuana) extract and lysergic acid diethylamide (LSD), which were equated on the basis of their effectiveness in suppressing responding, increased responding on a color dimension but not on a form dimension. High doses of LSD produced a decrement in discrimination performance while comparable doses of Cannabis did not effect accuracy. Treatment with Bromolysergic acid diethylamide, saline, and pentobarbital did not produce significant changes in performance. Results are discussed in terms of a break-down in stimulus control and central hallucinogenic activity.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 14 (1969), S. 394-403 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Morphine ; Skin Conductance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Skin conductance changes during periods of stress induced by hypercapnia were studied during a cycle of addiction to morphine. Conductance changes were found to be dose dependent in both tolerant and non-tolerant states. The effects of morphine on skin conductance changes induced by hypercapnia were similar to those effects previously observed on changes induced by electric shock.
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 14 (1969), S. 417-425 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Psychoses ; Reflex, Abnormal ; Chlorpromazine ; Trifluopromazine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary According to our results in 117 subjects, recently taken medications, age and sex must be considered when duration of the Achilles-tendon reflex is used as a clinical test to assess thyroid status. Males have a shorter ATR than females. In older subjects the ATR lasts longer than in those below age 27. Fifty-two psychiatric patients before medication did not differ in ATR duration from 65 controls. However, after 28 patients took chlorpromazine and 24 received trifluoperazine, ATR was prolonged in the chlorpromazine group and shortened in the trifluoperazine group. Neither chlorpromazine concentrate, 1,800 mg, nor trifluoperazine concentrate, 180 mg, given during the first six days, affected ATR, but an additional 6,000 mg of chlorpromazine, or an additional 420 mg of trifluoperazine over the next six days, did significantly alter ATR-duration.
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 14 (1969), S. 142-149 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Amphetamine ; Cholinergics ; Drug Interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Amphetamine was administered to a group of rats trained on a nondiscriminated avoidance procedure. An intraperitoneal dose of 2.0 mg/kg caused about a 75% increase in response rate for the three-hour session. Doses of atropine, Tremorine, eserine, and 4-(1-naphthylvinyl)-pyridine (NVP), an inhibitor of the enzyme choline acetylase, which were ineffective in themselves, markedly affected the increase in rate observed after amphetamine. The quarternary amine of NVP was without effect on the amphetamine response. Those agents that decreased cholinergic function, either by blocking the effect of acetylcholine or by preventing its synthesis, augmented the stimulating effect of amphetamine. Cholinergic stimulants, on the other hand, significantly antagonized the behavioral effects of amphetamine.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 14 (1969), S. 221-232 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Animal Behaviour ; Nicotine ; Punishment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effects of nicotine, amphetamine, chlordiazepoxide and caffeine were studied in rats trained on a VI 2 crf schedule of water reward with all rewards accompanied by electric shock. Responding, partially suppressed by the shock, was restored by chlordiazepoxide and further suppressed by amphetamine. Nicotine resembled amphetamine in its effects on most rats but occasionally increased responding. Caffeine also increased responding in some rats indicating that this property is not always confined to tranquillising drugs.
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  • 11
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 15 (1969), S. 109-115 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Hallucinogens ; Drug Effects ; Behavior Exploratory ; Monkeys
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effect of Psilocybin on the behavior of the baboon Papiopapio has been studied. Animal watchfulness, as estimated from the E.E.G., is enhanced within the first five minutes after injection and then is not further modified. Psilocybin induces a decrease of spontaneous motility. Conversely, the frequency of eye movements is considerably increased. This pattern might be explained by alterations of visual perception.
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 15 (1969), S. 134-143 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Anti-Anxiety ; Controlled Trial ; Doxepin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Six patients with persistent anxiety symptoms were used in a preliminary assessment of a new anti-anxiety compound-Doxepin (Sinequan) with placebo. The factorial design is discussed as a potentially useful way of conducting a first-stage test of anti-anxiety compounds. Analysis of the results showed that Doxepin at 25 mg t.d.s. and 50 mg t.d.s. was associated with improvement in the patient's self ratings of anxiety symptoms.
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 15 (1969), S. 144-152 
    ISSN: 1432-2072
    Keywords: Niacin ; Nicotinamide Adenine Dinucleotide ; Schizophrenia ; Phenothiazines ; Psychopharmacology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two grams of NAD were administered orally to ten chronic schizophrenic patients for twenty-one days. Five of the patients were also receiving thioridazine. There was no gross clinical improvement noted in any of the patients despite the fact that related experiments suggested that the NAD was absorbed. In those patients who were not also receiving phenothiazines there was a distinct tendency towards increased hostility, aggressiveness and irritability beginning one week after the initiation of NAD treatment and lasting for nearly two weeks after the NAD was discontinued.
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  • 14
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 15 (1969), S. 245-254 
    ISSN: 1432-2072
    Keywords: Aggression ; Lithium ; Psychopharmacology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The influence of lithium on aggressive behavior was studied in Siamese fighting fish, mice and golden hamsters. The fish stopped fighting when exposed to concentrations of 10 to 30 meq/l LiCl in the surrounding water. Also in mice and hamsters which ingested LiCl with the drinking fluid lithium abolished intraspecific aggression. Measurements of plasma and brain lithium levels revealed astonishing individual differences in the concentrations which were necessary for the antiaggressive effect. In all species normal aggressive behavior reappeared after lithium treatment was discontinued.
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  • 15
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Antidepressants ; Reserpine Emesis ; Apomorphine Pecking
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Seven psychic energizers have been quantitatively evaluated for their antidepressant and tranquillizing activity using antagonism of reserpine induced emesis and apomorphine induced pecking in pigeons as test procedures for the two activities respectively. Pheniprazine and deanol possess anti-reserpine activity only whereas imipramine, desmethylimipramine, amitriptyline, opipramol and orphenadrine possess both anti-reserpine as well as anti-apomorphine activity. It is suggested that the two tests form a simple and reliable combination for evaluating potential antidepressants.
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 15 (1969), S. 351-360 
    ISSN: 1432-2072
    Keywords: Nicotine ; Conditioned Stimulus ; Discrimination Learning ; Psychopharmacology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Rats were trained to respond for water rewards on different bars in a Skinner box depending on whether they had previously been injected with nicotine or with saline. No other drug tested could consistently elicit responses on the “nicotine correct” bar. Pre-treatment with mecamylamine abolished the rats' ability to distinguish between nicotine and saline but pretreatment with chlorisondamine did not.
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  • 17
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 14 (1969), S. 200-210 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Hashish ; Cannabinoids ; Monkeys Amphetamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. The psychopharmacological activity of Δ 1-tetrahydrocannabinol, (I); Δ 1(6)-tetrahydrocannabinol (4′ hexyl), (II); Δ 1(6)-tetrahydrocannabinol, (III); 1-ethoxyhexahydrocannabinol, (IV); 8-ethoxy-iso-hexahydrocannabinol, (V); Δ 1(6)-tetrahydrocannabinolic acid Me ester, Isomer I, (VI); Δ 1(6)-tetrahydrocannabinolic acid Me ester, Isomer II, (VII); cannabigerol, (VIII); Δ 1(6)-tetrahydrocannabinol (3′ hexyl), (IX); cannabichromene, (X); has been examined in a variety of animal species. 2. Compounds (I) and (III) caused severe motor disturbances and a stuporous state in dogs and ptosis, “tameness” and peculiar postural changes in monkeys. In the latter animal, compound (II) elicited similar effects. 3. Compounds (I) and (III) after intraperitoneal but not subcutaneous administration, suppressed the gerbil digging activity; reduced the rat conditioned avoidance response and induced a cataleptoid reaction in mice, rats and gerbils. In addition, compound (I) reduced the performance of mice on the rotating-rod. Both compounds, administered subcutaneously, induced a measurable ataxic gait in rats. 4. Amphetamine reversed the behavioural changes elicited by compounds (I) and (III) in monkeys, as well as the cataleptoid reaction in rats. 5. None of the other compounds provoked observable changes in any of the species studied. 6. It is suggested that Rhesus monkeys might serve as a suitable model for assessing the psychopharmacological activity of active cannabinoids.
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  • 18
    Electronic Resource
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    Springer
    Psychopharmacology 14 (1969), S. 248-254 
    ISSN: 1432-2072
    Keywords: Amphetamine ; Appetite Depressants ; Psychopharmacology ; Sympathomimetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A method is described with which it is possible to measure locomotor activity and food intake simultaneously in the same rat or other small animal. From a study of a number of psychomotorstimulant drugs and anorectic agents it may be concluded that locomotorstimulation and appetite-suppression are two different effects that may or may not characterize the same drug. Methamphetamine and phenmetrazine are stimulants in doses that do not inhibit food intake. Amphepramon reduced food intake in low doses but acts as a stimulant in higher doses. Chlorphemternine and phenfluramine are anorectic agents that are not stimulants, even in high doses.
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  • 19
    Electronic Resource
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    Springer
    Psychopharmacology 15 (1969), S. 28-38 
    ISSN: 1432-2072
    Keywords: Drugs ; Sleep ; Electroencephalography ; Psychophysiology ; Psychopharmacology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Sleep physiological patterns were examined following a single oral dose (500 mg) of the hypnotic drug alpha chloralose. The drug increased SW sleep and decreased REM sleep without affecting total sleep time or the amount of stage 2. These changes were accompanied by a shift to slower frequencies and greater EEG synchrony, as well as a decrease in the number of spontaneous arousals in all stages of sleep, and throughout the night of medication. Except for a slight decrease in eye movement density, the drug had no systematic effects on phasic phenomena such as electrodermal or cardio-respiratory fluctuations, nor was there a systematic change in basal heart and breathing rates. On the night following medication a “rebound” increase in percent stage REM was associated with a sharp decrease in SW sleep, and increases in spontaneous arousals and waking time. Such findings suggest that sleep stages are controlled by homeostatic mechanisms whose function is to maintain equilibrium. A comparison of the effects of alpha chloralose with those of the barbiturate secobarbital revealed some striking differences. Although both alpha chloralose and the barbiturate reduced the amount of stage REM and the frequency of brief arousals, the latter compound enhanced EEG fast activity and desynchrony, and suppressed such phasic phenomena as rapid eye movements during stage REM, sigma spindles in stage 2, nonspecific electrodermal responses during SW sleep and cardio-respiratory variability in all sleep stages. For secobarbital, the decrease in percent stage REM was compensated by an increase in stage 2 rather than SW sleep. Several studies in the cat suggest that in subanesthetic doses, alpha chloralose acts primarily on cortical inhibitory processes, causing release of the reticular activating system from inhibitory influences. The results of this study show that moderate doses in man probably act on both cortical and subcortical systems involved in the mediation of SW sleep, REM sleep and arousal.
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 15 (1969), S. 64-72 
    ISSN: 1432-2072
    Keywords: Amphetamine ; Dextro Amphetamine ; Psychopharmacology ; Conditioning, Operant ; Pharmacodynamics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Bar pressing was maintained by food reinforcement of each fiftieth response (FR50 schedule). Rats were tested at 3 levels of food deprivation (60, 80 and 100% of ad libitum body weight) under three drug conditions (0, 0.2 and 0.4 mg of D-amphetamine per rat). Overall response rate was reduced by increasing doses of drug, but not significantly by deprivation, within the range studied. The components of response rate were analysed separately into the starting speed (latency of the first response of each ratio run of 50 responses) and running rate. Drug level affected running rate and first latency of the session, whereas body weight affected only first latency of the session. Only the first latency of the session showed an interaction of drug level and body weight. The lack of interaction raises the question, whether amphetamine is more properly administered as total dose per rat, rather than proportional to body weight.
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  • 21
    Electronic Resource
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    Springer
    Psychopharmacology 15 (1969), S. 196-206 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Animal Behavior ; Alcohol ; Atropine ; Discrimination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Two operant procedures were used for training albino rats to make differential responses on the basis of their drug or nondrug condition. In the Conflict procedure, every fifth lever press was rewarded by a food pellet in one condition (drug for half the animals, saline for the other half) and was punished by electric shock in the other condition. For 6 animals the drug condition was ethyl alcohol (1200 mg/kg of a 10% v/v solution in isotonic saline, injected i.p. 5 min before the start of the session); for 4 animals the drug condition was atropine sulfate (10 mg/kg in 1 ml/kg saline injected i.p. 30 min before the start of the session). In the Choice procedure, food reward was obtained by the first press on one of two levers at a variable time interval, averaging one minute, after the prior food reward. The rewarded lever depended on the animal's drug or saline condition (alcohol for 7 animals, atropine for 5 animals, administered as in the Conflict procedure); the same right-hand or left left-hand lever was rewarded in the drug condition for half the animals and in the saline condition for the other half. The response associated with 1200 mg/kg alcohol was generally elicited in tests with sufficiently high doses of pentobarbital sodium (10–20 mg/kg), chlordiazepoxide hydrochloride (10–15 mg/kg) and chloral hydrate (90–120 mg/kg, administered orally). Lower doses of these compounds, and of alcohol, were perceived as less similar to the alcohol and therefore more similar to the saline condition. Substantial doses of chlorpromazine hydrochloride (2 mg/kg) and d-amphetamine sulfate (1 mg/kg) also were perceived as similar to the saline condition. The response associated with a centrally acting anticholinergic (10 mg/kg atropine) was generally elicited in tests with several doses of scopolamine hydrobromide (0.06 to 1.0 mg/kg) and of atropine (2.5–5.0 mg/kg). The saline response was elicited by a lower dose of scopolamine (0.03 mg/kg) and by a peripherally-acting anticholinergic, atropine methyl bromide, at a dose (5 mg/kg) equimolar with 10 mg/kg atropine sulfate. The same results, including closely similar ED50 doses, were generally found with the Conflict and Choice procedures, despite the differences between them in the motivational basis for the differential drug and nondrug responses. The similarities and dissimilarities among these compounds in perceived stimulus characteristics also correspond closely with those reported by Overton (1966) with a locomotor shock-escape procedure in tests which were generally limited to a single high dose of each drug.
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  • 22
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    Psychopharmacology 15 (1969), S. 425-429 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Methysergide ; Mania ; Lithium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Six manic patients were studied in an open sequential drug trial of placebo and the serotonin antagonist methysergide; lithium was then substituted double-blind. No dramatic change occurred in individual manic item scores or in mean daily mania ratings after 48 hours or seven days of methysergide, although several of the patients showed slight trends toward improvement. However, after a mean duration of 10.3 days of lithium treatment, all manic item scores improved dramatically and significantly, so that complete clinical remission was evident in all patients. In view of the discrepancy between these essentially negative findings and several recent positive reports on the efficacy of methysergide in the treatment of mania, the authors feel that the indolealkylamine hypothesis of affective disorders should be further investigated.
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  • 23
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    Psychopharmacology 15 (1969), S. 19-27 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Animal Behavior ; Nicotine-Physical Performance ; Motivation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In sessions of ten runs each, swimming time of rats through a 4 m long water alley was measured. Four doses of nicotine (0.05; 0.1; 0.2; 0.4 mg/kg given intraperitoneally 30 minutes before testing) were tested in sessions with a braking load on the tails of the animals either in all 10 runs of a session, or in every second run, or in none of the 10 runs. Regardless of the swimming condition, nicotine produced a considerable, and at doses of 0.1 mg/kg and over, significant decrease of performance in the first two runs. From the third to the 10th run, the changes caused by nicotine were smaller and differed depending on the swimming conditions. A dose of 0.1 mg nicotine/kg improved performance in the “without-load-sessions” and the “without-load-runs” of the alternating sessions, while both 0.1 and 0.2 mg/kg improved performance of the “with-load-runs” of the alternating sessions. Performance in the “without-load-sessions” and the “without-load-runs” was depressed by 0.4 mg/kg and that in the “with-load-sessions” by 0.2 and 0.4 mg/kg.
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  • 24
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    Psychopharmacology 12 (1968), S. 384-399 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Tranquilizing Agents ; Chlordiazepoxide ; Frustration ; Animal Behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This experiment investigated the possibility that chlordiazepoxide (CDP) has unique properties that account for state dependent learning, and prevention of conflict-induced behavior fixations. One group of rats were given a discrimination problem on a Lashley jumping stand, but on even days all responses were punished. Another group were treated the same way except than on even days all responses were rewarded. Each of these groups were subdivided, half of the Ss were given CDP on even days, the other half no drug. The results showed that punishment on even days for the response to be learned disrupted learning more than reward for responses that were to be avoided. CDP practically eliminated these disruptive effects and aided learning for the punishment group, but led to a slower rate of learning for the reward group. These findings confirmed the hypothesis that CDP attenuates the effects of negative incentives, and that this property accounts for the drug's cue value in discrimination learning and for its fixation prevention characteristics.
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  • 25
    ISSN: 1432-2072
    Keywords: Central Nervous System ; Psychopharmacology ; DDT ; Parathion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The offspring of female mice treated with 2.5 mg/kg DDT during the second or third trimester of pregnancy showed a delayed acquisition of the conditioned avoidance response. If DDT was given in the first trimester, or if 3 mg/kg of Parathion was given during the pregnancy, no effect on the conditioned avoidance response of the off-spring was seen.
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  • 26
    ISSN: 1432-2072
    Keywords: Benzodiazepines ; Psychopharmacology ; Antianxiety ; Drug Tolerance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Oxazepam has two opposing actions on behavior: a responsedecreasing or depressant action and a response-increasing or disinhibitory action. The course of the two actions in chronic dosing was determined in rats in a test in which punished and unpunished schedules of reinforcement were alternated. The depressant action (measured by a decrease in the rate of unpunished behavior) was observed to undergo tolerance after 3–4 doses, while the disinhibitory action (measured by an increase in the rate of punished behavior) failed to show tolerance and even increased throughout the chronic series. The selective tolerance of the depressant action is probably due to neuronal adaptation, but changes in metabolism also may be involved. The increase in the rate of punished behavior is attributed, at least in part, to a progressive unmasking of the disinhibitory action as tolerance to the depressive action develops.
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  • 27
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Electrophysiology ; Arousal ; Animal Behavior ; Brain Biogenic Amines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have studied the interactions of reserpine and the monoamine oxidase inhibitors, nialamide and isocarboxazid, in rabbits. EEG recordings were made from animals with acute and chronically implanted electrodes. Gross behavioral observations were made in freely moving rabbits and brain amine concentrations of norepinephrine and serotonin were also determined. Emphasis was placed on observing drug effects over periods of time ranging up to 13 days. Rabbits given isocarboxazid or nialamide alone exhibit a phenomenon rarely seen in the control animals, namely partial activation, an EEG pattern in which slow waves of high amplitude are maintained in the cortex while fast activity appears in subcortical structures. This effect was also observed in rabbits treated with nialamide and reserpine in combination. By appropriate dosage schedules in which reserpine was administered to animals pretreated with monoamine oxidase inhibitors it was possible to maintain extended periods of frank arousal or EEG activation over a period of several days. The absolute concentrations of brain amines bore little or no relationship to the EEG effects observed, however, increased ratios of serotonin to norepinephrine were observed in conjunction with EEG activation and signs of behavioral excitement.
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  • 28
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    Psychopharmacology 12 (1968), S. 428-432 
    ISSN: 1432-2072
    Keywords: Ganglia, Basal ; Psychopharmacology ; Chlorpromazine ; Amphetamine ; Dopamine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In rats micro-injections in corpus striatum of quaternary chlorpromazine and related drugs give rise to highly characteristic neuroleptic effects: antagonism of amphetamine-induced stereotyped behaviour and development of catalepsy. There is no effect of injections in hippocampus or septum. Dopaminergic mechanisms in corpus striatum seem to play a central role in neuroleptic action.
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  • 29
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    Psychopharmacology 13 (1968), S. 118-128 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Diagnosis ; Sampling Studies ; Statistics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Theoretical models for sample selection by diagnosis using one, one-out-of-two, two, two-out-of-three, and three concurring opinions are illustrated. These models are then applied to two categories, schizophrenia and depressive disorders, for an actual sample of patients diagnosed by multiple observers. The conclusion is reached that sample selection by a single opinion is not sufficiently reliable for research studies. The choice of alternative methods of selection depends on the needs of a particular study. Samples chosen on the basis of two-out-of-three concurring opinions provide the least total error. When erroneous inclusions are particularly undesirable, higher degrees of consensus—e.g. agreeing pairs or triplets—are necessary.
    Type of Medium: Electronic Resource
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  • 30
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    Psychopharmacology 13 (1968), S. 129-139 
    ISSN: 1432-2072
    Keywords: Electroencephalography ; Psychopharmacology ; Imipramine ; Amphetamine ; Physostigmine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The results of the interaction of imipramine, physostigmine and d/l amphetamine in various intravenously administered dosages were studied on the cortical and subcortical electrical activity of cats. Imipramine was shown to cause a cortical synchronization, hippocampal desynchronization, rise in the threshold of electrocortical arousal and limbic convulsive activity which was potentiated by amphetamine. Imipramine increased the amount of physostigmine, but decreased the amount of amphetamine needed for cortical desynchronization. The possible significance of these findings for the neuropsychopharmacological action of imipramine is briefly discussed.
    Type of Medium: Electronic Resource
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  • 31
    ISSN: 1432-2072
    Keywords: Indoleamine Metabolism ; Psychopharmacology ; Antidepressive Drugs ; Amphetamine Derivatives (Chlorinated) ; Depression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary CMA (p-chloro-N-methylamphetamine) lowers the cerebral 5-HT concentration in test animals but has virtually no effect on the catecholamine concentrations. Moreover, this compound was found to behave in depressive patients like an antidepressive drug, not like a central stimulant of the amphetmine type. The study described was conducted in order to establish whether CMA influences the overall metabolism of indoleamines in man. Such an influence was clearly demonstrable. Our findings are consistent with the hypothesis that CMA releases 5-HT from its depots. It has not been explained why a considerable proportion of the released 5-HT is excreted unchanged and why the increase in 5-HIAA excretion is so small: the overall activity of MAO was found not to be inhibited. No indications of abnormal 5-HT degradation were found at this time. Patients with vital depressions who improved on CMA medication showed a lower 5-HIAA excretion before treatment than did patients who were refractory to CMA treatment. This is consistent with earlier observations. The possible cause of this phenomenon is discussed. Among the various possibilities considered, an abnormal 5-HT metabolism is regarded as the most plausible. Pertinent investigations are being continued.
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  • 32
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    Psychopharmacology 13 (1968), S. 161-169 
    ISSN: 1432-2072
    Keywords: Sleep-wakefulness Cycle ; Amphetamine ; Psychopharmacology ; Growing Animals ; Electrencephalography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. The effects of amphetamine on the sleep-wakefulness cycle were studied in 48 kittens during the growth period of 1–28 days of age. Recordings of EEG, EMG of the posterior neck muscles and respiratory rhythms were made as well as observations of gross behavior. 2. Percent time of wakefulness was increased with amphetamine (0.3 mg/kg). This effect became more marked with age, i.e., being more significant after 16 to 18 days of age (P〈0.005) than before (P〈0.05). These increases in the intensity of the effect during growth may be related to the postnatal development of the structures responsible for wakefulness. 3. Percent time of “activated” sleep was diminished significantly at all ages including the newborns (P〈0.005). This lack of the influence of age suggests that the structures responsible for “activated” sleep are well developed at birth. 4. The increase of percent time of slow wave sleep was observed. This increase is regarded as a “passive” manifestation of time left available after a severe diminution of “activated” sleep time and relatively slight increase of wakefulness time during amphetamine medication.
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  • 33
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    Psychopharmacology 13 (1968), S. 287-298 
    ISSN: 1432-2072
    Keywords: Motion Pictures ; Motor Skills ; Eye Movements ; Psychopharmacology ; Psychological Tests
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Measures of skilled motor performances, both of a task-oriented (tests of eye-hand coordination) and incidental (control of facial and ocular muscles) nature were recorded for a sample of 20 healthy young adults before and after single administrations of perphenazine, opipramol, imipramine and placebo at doselevels commonly supposed to produce mood or behavioral effects. It was anticipated that such performances would be sensitive even to slight changes in the subjects' physiological and psychological state; the aim was to test the power of tests of subtle skills in providing indices of slight to moderate behavioral effects. The performance measures remained surprisingly little affected by all drugs, despite their sensitivity to drug-independent improvement in performance throughout the experimental day, and despite evidences of drug-related effects, especially for imipramine and opipramol, in simple objective physiological measures, and for imipramine alone in subjective measures taken concurrently. There may be a class of skilled sensory-motor acts, particularly those related to well-learned daily activities, which, rather than being vulnerable to adverse effect, remain efficient even in the presence of signs of disturbance of bodily function.
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  • 34
    ISSN: 1432-2072
    Keywords: Cannabis ; Lysergic Acid Diethylamide ; Mescaline ; Hallucinogens ; Psychopharmacology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Using climbing rope and bar-pressing behavior methods, rats were rendered tolerant to Δ 9-THC, cannabis extract, mescaline and LSD-25. Cross-tolerance experiments showed that rats refractory to Δ 9-THC and cannabis extract were still sensitive to mescaline and LSD-25, and vice-versa. These results suggest that, in spite of the similarity of the clinical symptoms produced in man by the 3 drugs, Δ 9-THC may have its psychotomimetic effects produced by different mechanisms from those of LSD-25 and mescaline.
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  • 35
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    Psychopharmacology 12 (1968), S. 371-383 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Cholinergic Blocking Drugs ; Animal Behavior ; Scopolamine ; Conditioned Reflex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Atropine or scopolamine improved conditioned avoidance behavior for most rats which performed poorly, in spite of extensive training, in a shuttle-box procedure. As previously reported, d-amphetamine also improved performance in many of these animals, but there was no particular relationship between a rat's responses to the cholinergic blocking agents and to d-amphetamine. The effect of any one of the 3 agents was, for the most part, reversible after the drug effect had dissipated. Physostigmine was quite potent in disrupting avoidance behavior in rats that performed well in the shuttle-box, even in animals that were overtrained. This impairment was antagonized by atropine or scopolamine, partly antagonized by d-amphetamine, and not antagonized by methyl atropine. Poor performers were found to be very sensitive to the disruptive effects of physostigmine, losing much of their escape behavior after relatively small doses. The results are interpreted as evidence for a central cholinergic system with inhibitory influences for modulating stimulus-response patterns. Under normal circumstances this inhibitory system probably functions in an integrated manner with the adrenergic mobilizing system for the central control of learned behavior. Centrally-active anticholinergic drugs of the muscarinic type appear to influence behavioral responses by inducing a response disinhibition.
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  • 36
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    Psychopharmacology 13 (1968), S. 210-221 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Animal Behaviour ; Nicotine ; Physostigmine ; Motor Activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Rats of 3 strains were observed at regular intervals and their activity was recorded using four categories of behaviour-rearing, moving, grooming and immobile. Strain differences in control activity were found. Nicotine and physostigmine reduced the activity of the more active rats and increased that of the less active animals. Rearing behaviour was particularly susceptible to depression by both drugs. The similarity of effect of the two drugs supports the hypothesis that one of the actions of nicotine in the brain is the release of acetylcholine.
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  • 37
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    Psychopharmacology 12 (1968), S. 414-423 
    ISSN: 1432-2072
    Keywords: Psychopharmacology ; Barbiturates ; Phenothiazines ; Animal Behavior ; Motor Coordination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The rotarod test of motor coordination in mice was modified by increasing the rotation speed every 30 sec until the animals fell off. This procedure yielded a stable, proficient level of performance within four brief trials; the approximately normal distribution of performance times provided an equivalent measure of either improvement or impairment caused by drugs and permitted the use of parametric statistical tests. A total of 240 mice were assigned to 20 different groups of 12 each, administered oral doses of placebo or different drugs, prior to trial 4. The use of a ratio score (performance time in trial 4 divided by the same animal's time in trial 3) provided a measure of drug-induced changes, controlling for individual differences among animals in over-all level of performance. Two phenothiazines (chlorpromazine and perphenazine) impaired performance at low doses, with a progressively greater decrement at increasing doses (4, 8, 16 mg/kg); 2 barbiturates (pentobarbital and amobarbital) showed an all-or-none effect, with no significant decrement at the lower doses (20 and 40 mg/kg) but almost complete incapacitation at the highest dose of 80 mg/kg. Performance superior to the placebo condition was found with the 2 lower doses of pentobarbital and with 3 d-amphet-amine doses (4, 8, 16 mg/kg). An analysis of individual differences gave evidence that the animals which were inferior in prior performance were more susceptible to both improvement and impairment of performance under the influence of drugs.
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