Table of Contents
ISRN Rehabilitation
Volume 2014, Article ID 629049, 10 pages
Research Article

Differences in Symptoms among Adults with Canal versus Otolith Vestibular Dysfunction: A Preliminary Report

1Adjunct Clinical Faculty, Nova Southeastern University, 3200 South University Drive, Fort Lauderdale, FL 33328, USA
2OrthoSport, Inc., 5200 South University Drive, Suite 105, Fort Lauderdale, FL 33328, USA
3Specialty Therapy Source LLC, 12948 Palmetto Glade Drive, Jacksonville, FL 32246, USA

Received 28 October 2013; Accepted 26 November 2013; Published 9 January 2014

Academic Editors: S. Eyigor and C.-L. Kao

Copyright © 2014 Lisa Farrell and Rose Marie Rine. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Despite the importance of symptomatology in the diagnosis of vestibular dysfunction, the qualitative nature of the symptoms related to semicircular canal (canal) versus otolith dysfunction is not fully understood. The purpose of this study was to compare symptoms, and their severity, in individuals with canal versus otolith peripheral vestibular dysfunction. A subjective tool, the Descriptive Symptom Index (DSI), was developed to enable categorization of symptoms as rotary, linear, imbalance or falls, and nondistinct. Fourteen adults were recruited and grouped based on vestibular function testing: canal only dysfunction, otolith only dysfunction, or canal and otolith dysfunction. Also, the Dizziness Handicap Inventory (DHI) was used to grade the severity of perceived limitations due to symptoms. The DSI was reliable and differentiated those with canal (rotary symptoms) versus otolith (linear symptoms) dysfunction. Most individuals with otolith only dysfunction did not report rotary symptoms. DHI scores were significantly higher in those with otolith dysfunction, regardless of canal functional status. All who experienced falls had otolith dysfunction and none had canal only dysfunction. Results support the importance of using linear and rotary descriptors of perceived disorientation as part of diagnosing vestibular dysfunction.