Electrophysiological evidence for a direct neuronal connection from the motor cortex to the parietal association cortex of the cat.
Neuronal responses of the parietal association cortex to motor cortex stimulation were studied intracellularly in anaesthetized cats. Antidromic responses and monosynaptic excitatory postsynaptic potentials (EPSPs) of ipsilateral anterior suprasylvian and lateral gyri neurons have been established. Oligo- and polysynaptic EPSPs were also recorded. Some cells reacted with both antidromic and orthodromic excitation. It is concluded that, besides the well-known parietal-to-motor cortex projection, there is also a reciprocal link from the motor cortex back to the parietal association cortex.
Fanardjian
V V
VV
Laboratory of Physiology of Central Nervous System, L.A. Orbeli Institute of Physiology, National Academy of Sciences of Armenia, Yerevan.
Papoyan
E V
EV
D000818:Animals; D001244:Association; D002415:Cats; D004594:Electrophysiology; D005071:Evoked Potentials; D009044:Motor Cortex / Q000502:physiology*; D009434:Neural Pathways / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D010296:Parietal Lobe / Q000166:cytology / Q000502:physiology*; D011930:Reaction Time; D009435:Synaptic Transmission