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Subjective visual vertical perception and sense of smell in Parkinson disease

Subjective visual vertical perception and sense of smell in Parkinson disease. Ahmed Khattab, PhD; Sharon Docherty, PhD; Jeff Bagust, PhD; Robert Willington, MBBS; Peter Thomas, PhD; Khaled Amar, FRCP. Aim

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Subjective visual vertical perception and sense of smell in Parkinson disease

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  1. Subjective visual vertical perception and sense of smell in Parkinson disease Ahmed Khattab, PhD; Sharon Docherty, PhD; Jeff Bagust, PhD; Robert Willington, MBBS; Peter Thomas, PhD; Khaled Amar, FRCP

  2. Aim • Determine profiles of subjective visual vertical (SVV) perception and sense of smell perception in participants with Parkinson disease (PD) and nondisabled controls. • Relevance • It is not fully understood whether nonmotor features are affected in all patients with PD and at what age.

  3. Methods • Open cross-sectional observational study. • 47 participants with PD. • 47 age- and sex-matched nondisabled controls. • All participants completed: • Computerized rod and frame (CRAF) test. • To examine perception of SVV. • 12-item University of Pennsylvania Smell Identification Test. • To examine olfactory perception.

  4. Results • Smell test performance: • PD participants and controls significantly differed. • Untilted frame in CRAF: • PD participants and controls significantly differed. • Tilted frame in CRAF: • PD participants and controls did not significantly differ. • No. correctly identified odors and individual’s SVV error: • No significant correlation. • Mini-Mental State Examination score and time to complete CRAF in PD participants: • Significant negative correlation.

  5. Conclusion • SVV errors might be more correlated with cognitive function than with loss of sense of smell.

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