abnormal cerebellum morphology abnormal cerebellum deep nucleus morphology 2010-02-11T09:46:40Z MA:0000203 MP:0009979 MPheno.ontology abnormal cerebellum deep nuclei morphology any structural anomaly of the gray matter nuclei located in the center of the cerebellum, embedded in the white matter, which receive inhibitory (GABAergic) inputs from Purkinje cells in the cerebellar cortex and excitatory (glutamatergic) inputs from mossy fiber pathways; all output fibers of the cerebellum originate from the these nuclei csmith