Effect of one step backward on gait initiation in people with Parkinson's disease
| Autor: | I-Ting Lien, 連怡婷 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 Background: Gait initiation required transitions from relatively stationary positions to stability with movement and from double- to single-limb stance. These were deliberately destabilizing activities that may be difficult for people with Parkinson’s disease (PD), even when they had no problems with level walking. Researchers had suggested that external cues may improve gait initiation in persons with PD. However, there were little study that documents the effects of external cues on gait initiation. Purpose: To investigate the effect of a backward step on gait initiation in people with PD. Methods: This study was an experimental with cross-over design. Sixtween subjects with idiopathic PD (Hoehn & Yahr stage II or III) was recruited and randomly assigned to two groups (n=8 for each group). All subjects performed two conditions. Control condition was self-generated gait initiation. Cueing condition was gait initiation with a backward step. Subjects in group A performed control condition and then cueing condition. Subjects in group B performed cueing condition and then control condition. Each condition collected 10 trails. The outcome measures include the timing, length of step and center of pressure displacement and velocity. Center of pressure displacement was used to reflect control of the forces exerted on the ground during gait initiation. All of the data were obtained from a forceplate. Statistics: Paired samples t test was utilized to analyze the difference between control and cue condition. The level of significance was set atα= 0.05. Results: Relative to control condition, cueing condition resulted in decrease of double limb support and gait initiation phase 1 and 2 duration; increase of center of pressure displacement and first and second step length. Conclusions: Our results suggested that a backward step was a positive contribution to the timing, center of pressure displacement and step length during gait initiation in people with PD. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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