Laboratoire de la Performance Motrice, Université de Lyon, Université Claude Bernard Lyon 1, CRIS EA 647, P3M, Mentale et du Matériel 27-29, Boulevard du 11 Novembre 1918, 69622 Villeurbanne Cedex, France.
Phys Ther. 2012 Jun;92(6):831-40. doi: 10.2522/ptj.20110351. Epub 2012 Mar 8.
Motor imagery (MI) ability should be evaluated in selected individuals with spinal cord injury (SCI) who can benefit from MI training in their rehabilitation program. Electrodermal activity seems to be a reliable indicator for assessing MI ability. However, individuals with SCI have a variety of autonomic dysfunctions.
This study aimed to investigate electrodermal responses (EDRs) elicited by MI.
A cost-utility analysis of EDR above and below the lesion level in individuals with complete or incomplete SCI (n = 30) versus a control group of individuals who were healthy (n = 10) was used.
The EDR was recorded above and below the lesion level during MI of a drinking action. Duration, latency, and amplitude of EDR were the outcome measures.
Hand and foot EDR in the control group occurred with the same pattern and similar latencies, suggesting a common efferent sympathetic pathway to sweat glands of the hand and foot mediating a sympathetic skin response. Individuals with SCI elicited responses above the lesion level. The EDR amplitude was correlated to the lesion level and autonomic dysreflexia history. No foot response was recorded in individuals with complete cervical and thoracic motor lesions. Foot response with a lower amplitude and higher latency occurred in participants with incomplete motor lesion, suggesting a link between the descending motor pathway and sympathetic function.
The small sample of individuals with incomplete SCI limits the generalization of the results obtained at the foot site.
Electrodermal response above the lesion level may be a reliable index for assessing MI ability in individuals with SCI. It is a noninvasive, user-friendly method for clinicians to consider before enrolling individuals in MI training.
在那些能够从康复计划中的运动想象训练中受益的脊髓损伤（SCI）患者中，应该评估运动想象（MI）能力。皮肤电反应（EDR）似乎是评估 MI 能力的可靠指标。然而，SCI 患者有多种自主神经功能障碍。
本研究旨在研究 MI 诱发的 EDR。
使用成本-效用分析，对完全或不完全 SCI 患者（n=30）与健康对照组（n=10）的 EDR 进行分析，观察 EDR 在损伤水平以上和以下的反应。
在 MI 饮水动作时，记录损伤水平以上和以下的 EDR。EDR 的持续时间、潜伏期和振幅是观察指标。
对照组的手和脚 EDR 出现相同的模式和相似的潜伏期，这表明手和脚的汗腺有共同的传出交感神经通路，介导交感皮肤反应。SCI 患者在损伤水平以上产生反应。EDR 振幅与损伤水平和自主反射障碍史相关。完全颈胸运动损伤的患者没有记录到脚反应。不完全运动损伤的参与者出现振幅较低、潜伏期较高的脚反应，提示下行运动通路与交感功能之间存在联系。
不完全 SCI 患者的样本量小，限制了在脚部获得的结果的推广。
损伤水平以上的皮肤电反应可能是评估 SCI 患者 MI 能力的可靠指标。它是一种非侵入性、易于使用的方法，临床医生可以在考虑让患者参加 MI 训练之前使用。
