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Persistent postural perceptual dizziness is on a spectrum in the general population
Georgina Powell1, Hannah Derry-Sumner2, Deepak Rajenderkumar2
1From the School of Psychology (G.P., S.K.R., P.S.), Cardiff University; and University Hospital of Wales (H.D.-S., D.R.), Cardiff, UK. Powellg7@cardiff.ac.uk.
Neurology
|April 18, 2020
Summary
Persistent postural perceptual dizziness (PPPD) symptoms are more common in the general population than previously thought, existing on a spectrum. This challenges the notion that PPPD solely results from vestibular damage.
Area of Science:
- Neuroscience
- Vestibular Disorders
- Psychophysics
Background:
- Persistent postural perceptual dizziness (PPPD) is often considered a consequence of vestibular insult.
- Current theories suggest PPPD is exclusively linked to specific vestibular damage.
Purpose of the Study:
- To investigate the prevalence and spectrum of PPPD symptoms in the general population.
- To challenge the existing paradigm that PPPD is solely a result of vestibular insult.
Main Methods:
- Administered Visual Vertigo Analogue Scale (VVAS) and Situational Characteristics Questionnaire (SCQ) to community volunteers, online participants, and students.
- Collected data from 2,359 participants across three nonclinical cohorts and 25 diagnosed PPPD patients.
Main Results:
- Approximately 9-11% of nonclinical participants scored above the 25th percentile for PPPD on VVAS, and 49-54% on SCQ.
- PPPD symptom scores showed a negative correlation with age and a partial correlation with migraine, indicating other factors are involved.
Conclusions:
- PPPD symptoms are prevalent in nonclinical populations, suggesting a pre-existing spectrum rather than solely post-insult phenomenon.
- Atypical visuo-vestibular processing may predispose individuals to visually induced dizziness, potentially exacerbated by vestibular insults.
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