Clinical Evaluation and Research Unit, West Park Healthcare Centre, Toronto, Canada.
J Rehabil Med. 2011 Nov;43(11):1020-6. doi: 10.2340/16501977-0880.
To evaluate the influence of a secondary task on foot pedal reaction time, movement time and total response time in patients with transtibial amputation.
Controlled trial without randomization.
Ten patients with transtibial amputation and 13 age-matched controls.
Foot pedal reaction time and movement time were measured for both legs under simple and dual-task conditions.
To evaluate the influence of a secondary task on foot pedal reaction time, movement time and total response time in patients with transtibial amputation.
Controlled trial without randomization.
Ten patients with transtibial amputation and 13 age-matched controls.
Foot pedal reaction time and movement time were measured for both legs under simple and dual-task conditions.
While mean simple reaction time was similar for both groups (258 (standard deviation (SD) 53) vs 239 (SD 34) ms), a group by reaction time condition interaction (p < 0.05)identified a disproportionately greater mean dual-task effect among patients with transtibial amputation (432 (SD 109)vs 317 (SD 63) ms), apparently affecting the prosthetic and intact legs equally (426 (SD 110) vs 438 (SD 107) ms). Among patients with transtibial amputation faster movement time was achieved with the intact leg (185 (SD 61) vs 232 (SD 58)ms, p < 0.0001). Compared with controls, patients with transtibialamputation demonstrated impaired mean movement time (142 (SD 37) vs 208 (SD 64) ms, p < 0.001) and total response time (420 (SD 80) vs 552 (SD 151) ms, p < 0.001) regard less of reaction time condition.
This study appears to have identified a functional manifestation of central reorganization following patients with transtibial amputation, affecting the prosthetic and intact lower limbs equally.
评估在小腿截肢患者中，次要任务对脚踏板反应时间、运动时间和总反应时间的影响。
无随机对照的临床试验。
10 名小腿截肢患者和 13 名年龄匹配的对照者。
在简单和双重任务条件下，分别测量双腿的脚踏板反应时间和运动时间。
虽然两组的平均简单反应时间相似（患者组 258（标准差 53）ms，对照组 239（标准差 34）ms），但组间反应时间条件的交互作用（p<0.05）表明，小腿截肢患者的平均双重任务效应更大（患者组 432（标准差 109）ms，对照组 317（标准差 63）ms），这显然会平等地影响假肢和完好腿（患者组 426（标准差 110）ms，对照组 438（标准差 107）ms）。在小腿截肢患者中，完好腿的运动时间更快（185（标准差 61）ms，p<0.0001）。与对照组相比，小腿截肢患者的平均运动时间（患者组 142（标准差 37）ms，对照组 208（标准差 64）ms，p<0.001）和总反应时间（患者组 420（标准差 80）ms，对照组 552（标准差 151）ms，p<0.001）均较差，而与反应时间条件无关。
本研究似乎已经确定了小腿截肢患者中枢重组的一种功能表现，平等地影响假肢和完好的下肢。
