Cerebellar Connections

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Fig. 18-49 Diagram of major axonal input to the cerebellum and output to the brainstem. Left: afferent axons terminate ultimately in cerebellar cortex. Right: efferent axons originate from cerebellar nuclei (F= fastigial, I = interpositus, L = lateral). The rostral cerebellar peduncle (green) conveys output to contralateral motor centers (red nucleus and motor cortex via the thalamus). The middle cerebellar peduncle (orange) conveys input from the contralateral motor cortex, via pontine nuclei. The caudal cerebellar peduncle (blue) connects to the pon-medulla. The fastigial nucleus sends axons bilaterally to reticular formation and vestibular nuclei. Each caudal peduncle conveys ipsilateral spinal input and climbing axons from the contralateral olivary nucleus, which preprocesses spinal and motor content. (Omitted are ventral spinocerebellar tracts which travels through the rostral cerebellar peduncle and cortical output to vestibular nuclei.)

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