>
Fa   |   Ar   |   En
   Self-triggered assistive stimulus training improves step initiation in persons with Parkinson's disease  
   
نویسنده creath r.a. ,prettyman m. ,shulman l. ,hilliard m. ,martinez k. ,mackinnon c.d. ,mille m.-l. ,simuni t. ,zhang j. ,rogers m.w.
منبع journal of neuroengineering and rehabilitation - 2013 - دوره : 10 - شماره : 1
چکیده    Background: prior studies demonstrated that hesitation-prone persons with parkinson's disease (pds) acutely improve step initiation using a novel self-triggered stimulus that enhances lateral weight shift prior to step onset. pds showed reduced anticipatory postural adjustment (apa) durations,earlier step onsets,and faster 1st step speed immediately following stimulus exposure. objective. this study investigated the effects of long-term stimulus exposure. methods. two groups of hesitation-prone subjects with parkinson's disease (pd) participated in a 6-week step-initiation training program involving one of two stimulus conditions: 1) drop. the stance-side support surface was lowered quickly (1.5 cm); 2) vibration. a short vibration (100 ms) was applied beneath the stance-side support surface. stimuli were self-triggered by a 5% reduction in vertical force under the stance foot during the apa. testing was at baseline,immediately post-training,and 6 weeks post-training. measurements included timing and magnitude of ground reaction forces,and step speed and length. results: both groups improved their apa force modulation after training. contrary to previous results,neither group showed reduced apa durations or earlier step onset times. the vibration group showed 55% increase in step speed and a 39% increase in step length which were retained 6 weeks post-training. the drop group showed no stepping-performance improvements. conclusions: the acute sensitivity to the quickness-enhancing effects of stimulus exposure demonstrated in previous studies was supplanted by improved force modulation following prolonged stimulus exposure. the results suggest a potential approach to reduce the severity of start hesitation in pds,but further study is needed to understand the relationship between short- and long-term effects of stimulus exposure. © 2013 creath et al.; licensee biomed central ltd.
کلیدواژه Freezing; Hesitation; Initiation; Intervention; Parkinson's; Step
آدرس department of physical therapy and rehabilitation science,university of maryland,school of medicine,100 penn street,baltimore,md,21201, United States, department of physical therapy and rehabilitation science,university of maryland,school of medicine,100 penn street,baltimore,md,21201, United States, department of neurology,university of maryland,school of medicine,baltimore,md, United States, northwestern university,feinberg school of medicine,department of physical therapy and human movement sciences,chicago,il, United States, northwestern university,feinberg school of medicine,department of physical therapy and human movement sciences,chicago,il, United States, northwestern university,feinberg school of medicine,department of physical therapy and human movement sciences,chicago,il, United States, northwestern university,feinberg school of medicine,department of physical therapy and human movement sciences,chicago,il, United States, department of neurology,northwestern university,feinberg school of medicine,chicago,il, United States, northwestern university,feinberg school of medicine,department of physical therapy and human movement sciences,chicago,il, United States, department of physical therapy and rehabilitation science,university of maryland,school of medicine,100 penn street,baltimore,md,21201, United States
 
     
   
Authors
  
 
 

Copyright 2023
Islamic World Science Citation Center
All Rights Reserved