Motor, sensory and callosal responses from cortex of Cercopithecus aethiops

Abstract

Cerebral fissuration in C. aethiops is patently similar to M. mulatta. Somato-sensory cortex is accessible with minimal dissection and no ablation; organization follows the familiar mammalian pattern. Functional organization of somato-motor cortex differs most from the macaque in having more representation on gyri; “supplementary” areas ubiquitously elicit movements of shoulder and neck to the exclusion of specific responses in extremities. Transcallosal responses in associative areas are less prominent in green monkey than in cat, with evidence of a loss of neural inhibition following section of the corpus callosum. Contrast between responses obtained under deep pentobarbital anesthesia and α-chloralose is negligible.