[The characteristics of the neuronal organization of the sympathetic-activating and sympathetic-inhibiting mechanisms of the visceral area of the limbic cortex].
Effects of high frequency stimulation of dorsal and ventral regions of anterior area 25 of the limbic cortex on the tonic electrical activity of two postganglionic sympathetic nerves of stellate ganglion-inferior cardiac and vertebral nerves and arterial blood pressure were studied in anesthetized cats. It was revealed three types of medullary influences: generalized activation of both sympathetic nerves and pressor responses mainly in case of stimulation of ventral structures, generalized inhibition of electrical activity of both sympathetic nerves and depressor responses in case of stimulation of dorsal region of area 25 and selective modulation of activity, namely increase in activity of inferior cardiac nerve and simultaneous decrease of activity of vertebral nerve. According to data of our previous comparative studies of sympathetic responses of inferior and vertebral postganglionic nerves to stimulation of anterior and posterior hypothalamus as a working hypothesis it is supposed that the dorsal region of area 25 of limbic cortex is the analogy of trophotropic system of anterior hypothalamus, the ventral region--of ergotrophic system of posterior hypothalamus.
Baklavadzhian
O G
OG
Pogosian
N L
NL
Arshakian
A V
AV
D000818:Animals; D002415:Cats; D004525:Efferent Pathways / Q000502:physiology; D004558:Electric Stimulation; D005728:Ganglia, Sympathetic / Q000502:physiology; D008032:Limbic System / Q000502:physiology*; D008564:Membrane Potentials / Q000502:physiology; D009433:Neural Inhibition; D009474:Neurons / Q000502:physiology*; D013564:Sympathetic Nervous System / Q000502:physiology*; D009435:Synaptic Transmission; D014781:Viscera / Q000294:innervation*