On the adversive movement of the area 4c of the motor cortex

After the removal of the thalamus, nucleus caudatus, nucleus lenticularis, superior colliculus, or internal capsule, or after laminar coagulation of the motor cortex, electrical and chemical stimulation was made on the area 4c of the motor cortex of dogs. The results were as follows: 1) An adversive movement occurred by electrical stimulation and metrazol injection on the area 4c of the cerebral cortex. 2) The adversive movement from the area 4c does not pass through the thalamus, nucleas caudatus, nucleus lenticularis or superior colliculus, but through the direct efferent pathway in the internal capsule. 3) The adversive movement from the area 4c passes through the pyramidal tract.