All the following nuclei are seen on the floor of fouh ventricle except: (A) Facial nucleus, (B) Dorsal vagal nuclei, (C) Hypoglossal nucleus, (D) Abducens nucleus
Answer is A. Facial nuclei are not seen on the floor of fouh ventricle. Cranial nerve nuclei underneath the floor of 4the ventricle are: Abducent nucleus Vestibular nuclei Hypoglossal nucleus Dorsal nucleus of Vagus Nuclei of 9 and 11 cranial nerves (Ref: Vishram Singh textbook of clinical neuroanatomy, second edition pg 122, also refer table 10.3)