Cranial Nerve Exam: Normal Exam: Cranial Nerve 8 - Auditory Acuity, Weber & Rinn

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Cranial Nerve Exam: Normal Exam: Cranial Nerve 8 - Auditory Acuity, Weber & RinnUniversity of Utah Video1 min 11 sec - Jun 23, 2001The cochlear division of CN 8 is tested by screening for auditory acuity. This can be done by the examiner lightly rubbing their fingers by each ear or by using a ticking watch. Compare right versus left. Further screening for conduction versus neurosensory hearing loss can be accomplished by using the Weber and Rinne tests. The Weber test consists of placing a vibrating tuning fork on the middle of the head and asking if the patient feels or hears it best on one side or the other. The normal patient will say it is the same in both ears. The patient with unilateral neurosensory hearing loss will hear it best in the normal ear while the patient with a unilateral conductive hearing loss will hear it best in the abnormal ear. The Rinne test consists of comparing bone conduction (placing the tuning fork on the mastoid process) versus air conduction (placing the tuning fork in front of the pinna). Normally, air conduction is greater than bone conduction.... From the NeuroLogic Exam: An Anatomical Approach collection of the Health Education Assets Library (HEAL) http://www.healcentral.org. Copyright The University of Utah 2001; Updated Jan 2004; Updated June 2004; Updated July 2005. The videos are licensed under a Creative Commons Attribution-NonCommerical-ShareAlike 2.5 License (http://creativecommons.org/licenses/by-nc-nd/2.5/).
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