[Electrophysiological characteristics of cortico-cortical connections of the parietal associative area of the cerebral cortex (field 5) with the motor cortical zone].
In cats anaesthetized by thiopental sodium and immobilized with tubocurarin, corticocortical connections from the area 5 (suprasylvian gyrus) to the motor cortex were studied by means of the extracellular recording technique. When the intracortical microstimulation of the lateral part of the anterior sigmoide gyrus was actuated, 117 responses of neurons of area 5 were recorded, among them 70% were antidromic with latency 0.6-13.9 ms and 30% were orthodromic with latency 1.7-18.5 ms. Most of antidromically activated neurons with spontaneous activity were tested by peripheral stimulation. It allowed to recognize that most of them possess polysensory properties. It is suggested, that neurons of the parietal associative cortex, which are sending axons to the motor cortex, take part in a modulation of the motor cortex activity.
D000818:Animals; D001369:Axons / Q000502:physiology; D002415:Cats; D004594:Electrophysiology; D005071:Evoked Potentials; D009044:Motor Cortex / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D010296:Parietal Lobe / Q000502:physiology*; D010812:Physical Stimulation / Q000379:methods; D011930:Reaction Time / Q000502:physiology
Elektrofiziologicheskaia kharateristika korkovo-korkovykh sviazeĭ temennoĭ assotsiativnoĭ oblasti kory golovnogo mozga (pole 5) s motornoĭ korkovoĭ zonoĭ.