Pons: 6th, 7th, 8th, and Middle Cerebellar Peduncle Anatomy

Update item information
Identifier Ponswith_6_7_8
Title Pons: 6th, 7th, 8th, and Middle Cerebellar Peduncle Anatomy
Subject Sixth Nerve Palsy; OMS Pons; Facial Nerve; VOR Normal; VOR Abnormal
Creator Daniel R. Gold, DO, Departments of Neurology, Ophthalmology, Neurosurgery, Otolaryngology - Head & Neck Surgery, Emergency Medicine, and Medicine, The Johns Hopkins School of Medicine
Description From this cross-section of the pons, the proximity of the 7th and 8th fascicles can be appreciated, and a lateral inferior pontine syndrome (anterior inferior cerebellar artery territory), which could involve both of these fascicles, could cause acute prolonged vertigo accompanied by a + ipsilateral head impulse test (fascicle of 8) and ipsilateral lower motor neuron facial palsy (fascicle of 7). Although a "central" acute vestibular syndrome typically has a negative/normal head impulse test (HIT), exceptions exist where a + HIT can be seen in the setting of an acute posterior fossa stroke. Typically these "central" + head impulse tests are seen with lesions affecting the root entry zone of CN8, or those involving the vestibular nucleus or with labyrinthine ischemia. A lesion involving the middle cerebellar peduncle (MCP) itself can also result in acute prolonged vertigo, but if the 8th fascicle is spared, a normal/negative HIT is generally seen.
Contributor Daniel R. Gold, D.O.
Publisher Spencer S. Eccles Health Sciences Library, University of Utah
Date 2017
Type Image
Format image/jpeg
Relation is Part of NOVEL: Neuro-ophthalmology Virtual Education Library Examination Collection
Rights Management Copyright 2016. For further information regarding the rights to this collection, please visit: https://NOVEL.utah.edu/about/copyright
Holding Institution Spencer S. Eccles Health Sciences Library, University of Utah, 10 N 1900 E, SLC, UT 84112-5890
Collection Neuro-ophthalmology Virtual Education Library: NOVEL http://NOVEL.utah.edu
Language eng
ARK ark:/87278/s6cv8bhf
Setname ehsl_novel_gold
Date Created 2017-07-26
Date Modified 2021-05-06
ID 1256243
Reference URL https://collections.lib.utah.edu/ark:/87278/s6cv8bhf