[Afferent projections to the nodulus in the cat. I. Climbing fiber projections].

Olivocerebellar projections to the nodulus of the cat were studied by the horseradish peroxidase (HRP) method. The findings derived from the present study indicate that the nodulus can be divided into 5 longitudinal zones on the basis of differences in the afferent projection sites from the contralateral inferior olive. These zones are the medial-most zone projected from the caudal half of the nucleus beta, the lateral zone of the medial part from the rostral half of the nucleus beta, the medial zone of the intermediate part from the caudal part of the dorsal cap, the lateral zone of the intermediate part from the rostral part of the dorsal cap and the ventrolateral outgrowth, the lateral-most zone from the dorsomedial cell column. There is no difference between the ventral and dorsal nodulus.