Modified Head Shake Computerized Dynamic Posturography Purpose Recent research on head shake posturography has demonstrated a modest increase in sensitivity to identifying peripheral vestibular system asymmetry when horizontal head movements were added to portions of the standard Sensory Organization Test (SOT) battery. However, limitations with respect to the head shake protocol were outlined, and usable data ... Research Article
Research Article  |   December 01, 2009
Modified Head Shake Computerized Dynamic Posturography
 
Author Affiliations & Notes
  • Julie A. Honaker
    University of Nebraska–Lincoln
  • Connie M. Converse
    U.S. Air Force Audiology, Lackland Air Force Base, San Antonio, TX
  • Neil T. Shepard
    Mayo Clinic, Rochester, MN
  • Contact author: Julie Honaker, 272 Barkley Center, University of Nebraska–Lincoln, Lincoln, NE 68583-0738. E-mail: jhonaker2@unl.edu.
Article Information
Balance & Balance Disorders / Research and Technology / Research Articles
Research Article   |   December 01, 2009
Modified Head Shake Computerized Dynamic Posturography
American Journal of Audiology, December 2009, Vol. 18, 108-113. doi:10.1044/1059-0889(2009/09-0012)
History: Received May 14, 2009 , Accepted August 26, 2009
 
American Journal of Audiology, December 2009, Vol. 18, 108-113. doi:10.1044/1059-0889(2009/09-0012)
History: Received May 14, 2009; Accepted August 26, 2009
Web of Science® Times Cited: 6

Purpose Recent research on head shake posturography has demonstrated a modest increase in sensitivity to identifying peripheral vestibular system asymmetry when horizontal head movements were added to portions of the standard Sensory Organization Test (SOT) battery. However, limitations with respect to the head shake protocol were outlined, and usable data for assessing performance could not be established. The purpose of this study was to test a change in protocol for use of head shake SOT to address the noted limitations.

Method Forty participants ranging in age from 20 to 79 years with no history of dizziness completed Conditions 2 and 5 of the SOT portion of computerized dynamic posturography on EquiTest equipment, while maintaining head still as well as 4 horizontal head movement velocity tasks.

Results Slope of a linear regression fit to 6 performance points was used to characterize each participant. Spearman’s ranked correlation (r) indicated a significant relationship between the slope of the line representing a decline in performance with age (r = −.52, p = .0006).

Conclusions The head shake modification showed a trend in increasing the separation of normal individuals across age and eliminated the limitations addressed in earlier research. Future research will investigate the head shake modification for identifying vestibular peripheral system asymmetries.

Acknowledgments
Participant recruitment was partially funded by Human Subjects Research Core Grant P30DC004662 to Michael Gorga, Principal Investigator, Boys Town National Research Hospital, and a Small Grant from the Department of Otorhinolaryngology at the Mayo Clinic–Rochester. A portion of this article was presented as a poster at the American Academy of Audiology’s annual conference on April 2–5, 2008, in Charlotte, NC.
Order a Subscription
Pay Per View
Entire American Journal of Audiology content & archive
24-hour access
This Article
24-hour access