part of nervous system olivocerebellar fiber system 2018-04-16T13:29:07Z BTO:0006157 BrendaTissueOBO Marion, contact@brenda-enzymes.org The olivocerebellar tract are neural fibers which originate at the olivary nucleus and pass out through the hilum and decussate with those from the opposite olive in the raphe nucleus, then as internal arcuate fibers they pass partly through and partly around the opposite olive and enter the inferior peduncle to be distributed to the cerebellar hemisphere of the opposite side from which they arise. olivo-cerebellar fiber system olivo-cerebellar tract olivocerebellar tract tractus olivocerebellaris