[Changes in the direct and interhemispheric responses of the pyramidal tract after tetanization of the cortex and lateral hypothalamus].
Changes in pyramidal tract response after unilateral neocortical and lateral hypothalamic tetanization were analyzed in unanesthetized and nonimmobilized rabbits. Membrane and synaptic modifications were revealed in intra- and interhemispheric connections. Changes in excitability of callosal collaterals of pyramidal tract neurons in contralateral hemisphere and changes in somatodendritic excitability in ipsilateral hemisphere could be oppositely directed. Plasticity of callosal connections may contribute to the interhemispheric asymmetry during learning.
Kozhedub
R G
RG
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
Zosimovskiĭ
V A
VA
Balashova
A N
AN
D000818:Animals; D004292:Dominance, Cerebral / Q000502:physiology*; D004558:Electric Stimulation / Q000379:methods; D004567:Electrodes, Implanted; D007026:Hypothalamic Area, Lateral / Q000502:physiology*; D008564:Membrane Potentials / Q000502:physiology; D009044:Motor Cortex / Q000502:physiology*; D009473:Neuronal Plasticity / Q000502:physiology; D009474:Neurons / Q000502:physiology; D011712:Pyramidal Tracts / Q000502:physiology*; D011817:Rabbits; D011930:Reaction Time / Q000502:physiology; D013569:Synapses / Q000502:physiology