CEREBRO-CEREBELLAR RELATIONSHIPS IN THE MONKEY

Abstract

Cerebro-cerebellar relationships were studied in the monkey (Macaca mulatta) by electrically stimulating various areas on the lateral cerebral surface and recording from the pial surface of the cerebellum (excluding the basal surfaces). Cerebral sensory and motor areas 3, 1, 2, and 4 project to the tactile areas of the cerebellum, i.e., anterior lobe: simplex and paramedian lobules and immediately adjacent folia. There is evidence of an "area-to-area" relationship, i.e., cerebral leg area to cerebellar leg area, etc. The cerebral auditory receiving area projects laterally and medially to the lobulus simplex and surrounding folia. The cerebral visual receiving area (area 17) projects to the lobulus simplex and surrounding folia as do cerebral areas 8 and 9. Areas 6 and 4s of the cerebrum project widely to contralateral crus I and II and lobulus simplex. Stimulation of areas 7, 18, 19 and 22 failed to evoke cerebellar responses. Basal cerebral surfaces and surfaces on the medial wall were not explored.