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  • 1
    Electronic Resource
    Electronic Resource
    Activation and inhibition of muscle and cutaneous postganglionic neurones to hindlimb during hypothalamically induced vasoconstriction and atropine-sensitive vasodilation (1976)
    Springer
    Pflügers Archiv 361 (1976), S. 231-240 
    Details
    ISSN: 1432-2013
    Keywords: Vasoconstrictors ; Vasodilators ; Muscle ; Hypothalamic stimulation ; Atropinesensitive vasodilation ; Single unit analysis ; Cat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. Discharge patterns in postganglionic neurones to muscle and to hairy skin of the hindlimb of chloralose anaesthetized cats were investigated during electrical hypothalamic stimulation which induced either vasoconstriction or atropine sensitive vasodilation in the skeletal muscle. 2. Spontaneously active postganglionic neurones to muscle were activated both during hypothalamically induced vasoconstriction and active vasodilation. Stimulation of the hypothalamic vasodilator area induced mostly a sequence of activation-depression-activation in these neurones. Stimulation of cutaneous Group IV afferents elicited reflexes in these neurones; repetitive high frequency stimulation of large diameter afferents in the vago-depressor nerve produced depression of spontaneous activity followed by a postinhibitory excitation. The characteristics of these neurones fit those that would be expected of vasoconstrictors. 3. Normally inactive postganglionic neurones to skeletal muscle could only be activated during hypothalamically induced atropine sensitive vasodilation. These neurones exhibit no reflexes on somatic stimulation. The axons of these neurones conduct faster than those of the spontaneously active postganglionic neurones. It is likely that they are cholinergic vasodilator neurones. 4. Most of the cutaneous postganglionic neurones to hairy skin were activated during stimulation of both the hypothalamic vasoconstrictor and the vasodilator areas. These neurones have the characteristics of cutaneous vasoconstrictor neurones. Part of the cutaneous not spontaneously active postganglionic neurones could neither be activated from the hypothalamus nor by somatic stimuli.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00587287
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Rhythmic activity in the cerebellum and spinal cord of rabbits receiving tetanus toxin intravenously (1981)
    Springer
    Naunyn-Schmiedeberg's archives of pharmacology 317 (1981), S. 51-53 
    Details
    ISSN: 1432-1912
    Keywords: Tetanus ; Toxin ; Cerebellum ; Spinal cord ; Motoneuron
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1. In rabbits intravenously injected with tetanus toxin (2×105 mouse LD50), a rhythmic electrical activity was recorded in the cerebellum and in the spinal cord. 2. The motor system appears to be strongly involved in this event, since the ventral roots displayed rhythmic activity correlated to the spinal cord rhythm. Extracellular recordings showed the same rhythmic discharge pattern in many alpha- and gamma-motoneurons and Renshaw cells of hindlimb flexor and extensor muscles. 3. Upon high spinalization at C1, the rhythm could be recorded in the cerebellum but no longer in the spinal cord. Cooling of the cerebellar surface suppressed the rhythm in both structures. 4. The data are discussed under the current view, that generalized tetanus is a special form of local tetanus. 5. We suggest that the rhythmic activity is of supraspinal origin and is transmitted to alpha- and gamma-motoneurons of both the flexor and extensor motor systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00506256
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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