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Persistent postural perceptual vertigo (PPPD) describes persistent vertigo and/or a sense of instability (without vertigo) exacerbated by an upright posture, resulting in increased
According to the diagnostic criteria of the International Classification of Vestibular Diseases, 19 patients with PPPD and 10 BV disease controls (confirmed by objective vestibular function tests) were included in the study
First, participants verbally assessed their perceived instability during observed swing measurements ("How unstable did you feel during the trial?").
PPPD participants in the intervention group were shown their own video recordings during observed swing measurements, as well as their pressure trajectory centers
Observed and perceived instability
The intervention group altered the relationship between
However, future PPPD biomarkers may need to include measurements of perceptual impairment rather than relying on observed postural swing results