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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 794 (1996), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Psychopharmacology 86 (1985), S. 182-189 
    ISSN: 1432-2072
    Keywords: Social separation ; Stress ; Alcohol ; Depression ; Rhesus monkey ; Alcoholism ; Norepinephrine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study used 16 socially reared juvenile rhesus monkeys as subjects to test the hypothesis that social separation promotes alcohol consumption in this species. In the first part of the study, 12 monkeys were intermittently separated from their social groups, while 4 were separated before the beginning of the study and remained continuously separated. Refrigerated water or aspartame-sweetened water (vehicle) containing 6% alcohol (w/v) were presented after 4.5 h of fluid deprivation. Intermittently separated monkeys drank more alcohol during separation than when they were socially housed, and more than the continuously separated monkeys. Stable individual differences in consumption rate developed over repeated separations. These differences were not correlated with consumption of refrigerated water or vehicle, or with differential behavioural (locomotor) responses to social separation. This suggested that some monkeys were predisposed to drink more alcohol than others. The second part of the study determined whether established alcohol/vehicle consumption rates for all 16 monkeys were altered when the monkeys were not water deprived, and then when water and the vehicle were available at the same time as alcohol/vehicle. Among monkeys that drank the most (mean of 2.4 g/kg/h) and the least (mean of 0.8 g/kg/h), alcohol consumption was not affected. These results, combined with previous reports, suggest a neurobiological linkage between genetically based social attachment mechanisms, social stressors, and vulnerability to alcohol abuse and addiction in primates.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-2072
    Keywords: Thyrotropin releasing hormone ; Thiobarbiturate ; Rhesus monkeys ; Rate of responding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Similar excitatory or depressant response rate dependent effects on monkeys responding on a variable interval reinforcement schedule were observed following intravenous administration of either thyrotropin releasing hormone (TRH) or thiobarbiturate. However, these agents were mutally antagonistic when given together even though the response rate altering effects of each agent were in the same direction. These findings establish an additional behavioral effect of exogenously administered TRH in primates and suggest that barbiturates might alter behavior in part through an interaction with brain TRH receptive mechanisms.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-2072
    Keywords: Alcohol ; Rhesus monkey ; Social separation ; Despair
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In humans, alcoholism and depression are often interrelated. This study examines the effects of alcohol on peer separation-induced despair in rhesus monkeys, a proposed nonhuman primate model of depression. Alcohol, at three different dose levels, or placebo was administered to rhesus monkeys undergoing repeated peer separation. Low-dose alcohol (1 g/kg/day) decreased separation-induced despair, whereas high-dose alcohol (3 g/kg/day) exacerbated the despair response as compared to placebo. This biphasic effect of alcohol on the despair response may be analogous to similar effects of alcohol on depression in humans.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-2072
    Keywords: Rhesus monkey ; Schizophrenia ; d-Amphetamine ; Norepinephrine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Social deprivation of rhesus monkeys in infancy results in increased sensitivity to psychotic-like behavioral effects of low doses of d-amphetamine given 2–3 years later. These behavioral effects are associated with increased levels of CSF norepinephrine. These data suggest that social developmental factors could be partially responsible for variation in neurochemical responses and long-lasting differential sensitivity of primates to the psychosis-inducing effects of d-amphetamine.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-2072
    Keywords: Norepinephrine ; Alcohol ; Cerebrospinal fluid ; Rhesus monkey ; Depression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Alcohol (1–3 g/kg) significantly increased the concentration of cerebrospinal fluid (CSF) norepinephrine (NE) in rhesus monkeys. This effect is consistent with the previously demonstrated activational and possible antidepressant effect of low doses of alcohol. The greatest increase was observed in subjects with low baseline levels of CSF NE. Individual differences in activation or euphoria could be related to differential increases in CSF NE following alcohol consumption.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-2072
    Keywords: 6-Hydroxydopamine ; Rhesus monkey ; 3-Methoxy-4-hydroxyphenylglycol (MHPG) ; Catecholamines ; Social behavior ; Operant performance ; Dyskinesia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The purpose of this study was to determine: 1) whether 6-hydroxydopamine (6-OHDA), previously shown to deplete brain catecholamines (CA) in rodents, depletes brain CA in rhesus monkeys; 2) whether depletion of brain CA produces changes in behavior; and, 3) whether urinary output of 3-methoxy-4-hydroxyphenylglycol (MHPG) reflects brain norepinephrine (NE) depletions. Repeated intracerebroventricular (ICV) injection of 6-OHDA (N=20; 15.5–73.3 mg/subject) produced chronic changes in social behavior and, at higher dosages, reduced output of urinary MHPG. However, 4 weeks after the last ICV 6-OHDA injection, urinary MHPG excretion returned to baseline values and whole brain CA content was not reliably different from control. A single treatment with 6-OHDA microinjected into the substantia nigra (SN) (N=12; 120–240 μg/subject) produced chronic whole brain depletions of brain CA without depleting serotonin. Reductions in brain CA were associated with a specific set of motor behaviors, aphagia, and adipsia. SN 6-OHDA produced greater brain NE depletions than ICV 6-OHDA, but urinary MHPG output was not reduced. SN 6-OHDA treated subjects showed chronic changes in social behavior and were more sensitive to the operant response rate decreasing effects of alpha-methyl-para-tyrosine (AMPT) than control subjects. Subjects with the largest depletions of brain dopamine (DA) (〉90%) were hypokinetic, rigid, and had a distal limb tremor. These results show that SN but not ICV injection of 6-OHDA can deplete brain CA in the rhesus monkey. The most prominent behavioral changes were characterized bydisturbances in motor function. Urinary MPHG output does not reflect depletions of brain NE in this species.
    Type of Medium: Electronic Resource
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