Effect of Haptic Cueing on Long-Range Autocorrelations in Parkinson's Disease Gait Variability

Patients walked in three conditions in a randomized order. During control condition, patients walked without cueing on a rectangular track of 63.2 meters at their comfortable gait speed. During Auditory Cueing Condition (ACC) patients walked on the same track using auditory cueing by the mean of a smartphone app called Soundbrenner thath deliverered rhythmic auditory stimulations through earphones paced 10% faster than each patient's preferred step frequence. During Haptic Cueing Condition (HCC) patients walked on the same track using haptic cueing by the mean of a vibratory device called Soundbrenner Pulse and attached to each patient's wrist located on their most affected side. The Soundbrenner app on the smartphone was connected to the Soundbrenner Pulse by Bluetooth to deliver rhythmic vibratory stimulations also paced 10% faster than each patient's preferred step frequence, the same frequence as during ACC.