abnormal cerebellar cortex morphology abnormal flocculonodular lobe morphology 2010-02-05T10:15:15Z MP:0009961 MPheno.ontology abnormal archicerebellum morphology abnormal vestibulocerebellum morphology any structural anomaly of the small region of the cerebellum that is posterior to the posteriolateral fissure in humans; it receives input from the inferior and medial vestibular nuclei and sends fibers back to the vestibular nuclei, and processes and integrates these signals to allow for the constant maintenance of balance csmith