abnormal cerebellum dentate nucleus morphology decreased cerebellum dentate nucleus size 2013-12-04T22:39:39Z MP:0012488 MPheno.ontology csmith decreased cerebellum lateral nucleus size decreased corpus dentatum size decreased dentate cerebellar nucleus size decreased lateral cerebellar nucleus size reduced cerebellum dentate nucleus reduced cerebellum dentate nucleus size reduced size of the largest and most lateral of the deep cerebellum nuclei; it receives axons of Purkinje cells in the lateral cerebellar hemisphere (neocerebellum) and receives its afferents from the premotor cortex and the supplementary motor cortex through the pontocerebellar system, and its efferents project through the superior cerebellar peduncle and is a major source of its fibers