Journal of Rehabilitation Research & Development (JRRD)

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Volume 49 Number 6, 2012
   Pages 961 — 970

Abstract — Subjective visual vertical perception and sense of smell in Parkinson disease

Ahmed Khattab, PhD;1* Sharon Docherty, PhD;2 Jeff Bagust, PhD;2 Robert Willington, MBBS;3 Peter Thomas, PhD;1 Khaled Amar, FRCP3
1School of Health & Social Care, Bournemouth University, Fern Barrow, Poole, Dorset, UK; 2Anglo-European College of Chiropractic, Bournemouth, Dorset, UK; 3Medicine for the Elderly Department, Royal Bournemouth Hospital, Bournemouth, Dorset, UK

Abstract–This article describes an open cross-sectional observational study involving 47 participants with Parkinson disease (PD) and 47 (age- and sex-matched) nondisabled controls without PD. The aim was to determine the profiles of subjective visual vertical (SVV) perception and sense of smell perception in both groups. There was a statistically significant difference (p < 0.001) between patients and controls on their smell test performance. Controls were more likely to correctly identify odors, with a median score of 10 out of 12 compared with 6.5 out of 12 for patients with PD. The median SVV error for the PD group when the frame was untilted was 0.75 degrees compared with 0.50 degrees for controls. This difference was statistically significant (p = 0.02). When the frame was tilted, the median SVV error for the PD group was 2.31 degrees compared with 2.00 degrees for controls (not statistically significant), with both groups showing similar distribution pattern of errors. There was no statistical correlation between number of correctly identified odors and an individual–s SVV error. However, a statistically significant negative correlation (r = –0.45, p = 0.01) was found between Mini-Mental State Examination score and mean time taken to complete each rod and frame test in patients with PD, suggesting that SVV errors might be more correlated with cognitive function than with loss of sense of smell.

Key words: computerized rod and frame test, correlation, Mini-Mental State Examination, motor functions, Parkinson disease, rehabilitation, sensory functions, smell, subjective visual vertical, visual perception.


View HTML  ¦  View PDF  ¦  Contents Vol. 49, No. 6
This article and any supplementary material should be cited as follows:
Khattab A, Docherty S, Bagust J, Willington R, Thomas P, Amar K. Subjective visual vertical perception and sense of smell in Parkinson disease. J Rehabil Res Dev. 2012;49(6):961–70.
http://dx.doi.org/10.1682/JRRD.2011.05.0090
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Last Reviewed or Updated  Thursday, August 16, 2012 11:27 AM

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