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A novel wearable laser device to regulate stride length in Parkinson's disease.
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Conf Proc IEEE Eng Med Biol Soc 2013 Jul; 2013:5895-8
Authors: Yan Zhao, Stefan Ramesberger, Urban M Fietzek, Lorenzo T D'Angelo, Tim C Luth
Decreased stride length is a highly relevant characteristic of the gait in patients with Parkinson's disease (PD). In this paper, a novel wearable laser device for stride length regulation is presented. The device is mounted to one foot and can project a red laser light strip to the floor as a visual cue for the other foot. In the experiment twelve healthy volunteers walked a 20 m straight walkway wearing the system on both feet. As an objective result, the stride length regulation reached an accuracy of 96.1±2.5 (94.0±3.5) % for a pre-defined stride length ?def= 55 (65) cm. The subjective evaluation by the participants using a questionnaire revealed that the visual cue projected from the laser device was considered a stable signal that did not shake during walking. 6 of 12 participants felt that this device was not interfering with their gait, 3 of 12 judged this aspect neutrally, and 3 of 12 considered it somehow bothersome.
PMID: 24111080 [PubMed - as supplied by publisher]