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Effects of Caudate Stimulation on Unitary and Mass Responses of the Visual Cortex to Light
Author(s) -
KADOBAYASHI Iwao,
AMANO Yoshio,
YAMANE Hideo,
MIYAMOTO Yoshihiro
Publication year - 1972
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1111/j.1440-1819.1972.tb01116.x
Subject(s) - caudate nucleus , stimulation , neuroscience , visual cortex , chemistry , conditioning , hippocampus , psychology , photic stimulation , visual perception , statistics , mathematics , perception
Summary Effects of caudate stimulation on unitary and mass responses of the visual cortex to flash were studied in light barbiturate anesthetized, or immobilized cats. A conditioning shock to the caudate nucleus produced an increase in amplitude of the primary components of the photically evoked potential in the lateral gyrus. The increase in amplitude of the potential was caused by bilateral caudate stimulation. Marked effects of caudate stimulation were observed at several conditioning‐test intervals. Unitary responses of the visual cortical neurons to light were enhanced or inhibited by the conditioning shock to the caudate nucleus. Enhancement of firing in response to light was more commonly seen in units which fired primarily after flash, but inhibition in those showing a primary neuronal silence and in those with irregular reaction and with no reaction. It is concluded that the caudate nucleus has an intimate functional interrelation with other structures in the brain stem.