ISSN:
1432-2013
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Summary 1. Stimulation of the anterior nucleus in anesthetized cats and man induces slowing or arrest of respiration. The effect upon the blood pressure in cats is variable, though a depressor effect is frequently observed. 2. Stimulation of the anterior nucleus in unanesthetized cats produces a “reaction of alertness” (the head is raised, the eyes are opened, the animal looks around and starts to walk), probably by activating hypothalamic mechanisms. 3. These reactions persist in cats after ablation of the cingular gyrus and of the fornix. 4. The inhibition of respiration observed on stimulation of the cingular gyrus is not prevented by elimination of the anterior nucleus. Efferent impulses from the cingular gyrus seem to reach the lower centers partly by a pathway coursing outside the anterior nucleus and partly by fibers synapsing in this nucleus. 5. Bilateral lesions of the anterior nuclei in cats produce a brief state of catalepsy followed by a transient period of reduced reactivity to threatening or painful stimuli.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00371774
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