[Asymmetry of the transcallosal responses in the parietal cortex of kittens in the 1st month of life].
In acute experiments on kittens the process of formation of asymmetry of transcallosal responses (TCR) was studied in multiple leads from symmetrical points of the parietal cortex. By the early positive-negative TCR complex, vanishing as a result of callosotomy, predominance of positive components in the right hemisphere was found in 2-7 days kittens, whereas in 8-24 days animals the left hemisphere dominated by both phases of responses. By the late TCR component preserved after section of the callosal body, left-hemispheric asymmetry was found in the elder group of kittens; it was absent in the younger animals. TCR asymmetry in the parietal cortex depended on the sex of the animals. With their age its inversion and enhancement took place. This process is based on the increase of TCR amplitude in the left hemisphere, with no increase in the right hemisphere.
V L
VL
Bianki
I A
IA
Makarova
N I
NI
Guseva
D000375:Aging; D000818:Animals; D001931:Brain Mapping; D002415:Cats; D003337:Corpus Callosum / Q000502:physiology*; D004292:Dominance, Cerebral / Q000502:physiology*; D004558:Electric Stimulation; D005071:Evoked Potentials; D005260:Female; D008297:Male; D010296:Parietal Lobe / Q000502:physiology*; D012727:Sex Characteristics
Asimmetriia transkallozal'nykh otvetov v temennoĭ kore u kotiat pervogo mesiatsa zhizni.