在模拟假肢使用过程中,抓握姿势的可变性会导致同侧感觉运动贝塔激活增强。

IF 1.1 4区 心理学 Q4 NEUROSCIENCES
Journal of Motor Behavior Pub Date : 2024-01-01 Epub Date: 2024-07-23 DOI:10.1080/00222895.2024.2364657
Bennett L Alterman, Saif Ali, Emily Keeton, Katrina Binkley, William Hendrix, Perry J Lee, John T Johnson, Shuo Wang, James Kling, Mary Kate Gale, Lewis A Wheaton
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引用次数: 0

摘要

使用不同级别上肢假肢的运动行为变化很大,这给解释理想的康复策略带来了挑战。阐明驱动变异的潜在神经控制机制有利于我们了解肢体缺失后的适应情况。在这项后续研究中,未截肢的参与者使用由身体提供动力的经桡侧或偏手假肢模拟器完成了简单和复杂的伸抓运动任务。我们假设,在复杂任务的限制下,采用可变抓握姿势的人将比依靠均匀抓握的人表现出更大的感觉运动β激活,而且可变抓握者的激活将晚于均匀抓握者。在简单任务中,部分手型可变使用者和跨桡侧使用者从伸手的早期到晚期都表现出神经激活的增加,主要是在使用设备的同侧半球。在复杂任务中,只有偏手可变抓握者的感觉运动皮层神经激活从伸手的早期阶段到晚期阶段都有显著增加。这些结果表明,抓握可变性可能是神经适应假肢使用机制中的一个重要组成部分,并可能受到装置水平和任务复杂性的影响,这对截肢后的康复具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Grasp Posture Variability Leads to Greater Ipsilateral Sensorimotor Beta Activation During Simulated Prosthesis Use.

Motor behaviour using upper-extremity prostheses of different levels is greatly variable, leading to challenges interpreting ideal rehabilitation strategies. Elucidating the underlying neural control mechanisms driving variability benefits our understanding of adaptation after limb loss. In this follow-up study, non-amputated participants completed simple and complex reach-to-grasp motor tasks using a body-powered transradial or partial-hand prosthesis simulator. We hypothesised that under complex task constraints, individuals employing variable grasp postures will show greater sensorimotor beta activation compared to individuals relying on uniform grasping, and activation will occur later in variable compared to uniform graspers. In the simple task, partial-hand variable and transradial users showed increased neural activation from the early to late phase of the reach, predominantly in the hemisphere ipsilateral to device use. In the complex task, only partial-hand variable graspers showed a significant increase in neural activation of the sensorimotor cortex from the early to the late phase of the reach. These results suggest that grasp variability may be a crucial component in the mechanism of neural adaptation to prosthesis use, and may be mediated by device level and task complexity, with implications for rehabilitation after amputation.

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来源期刊
Journal of Motor Behavior
Journal of Motor Behavior 医学-神经科学
CiteScore
3.10
自引率
0.00%
发文量
39
审稿时长
>12 weeks
期刊介绍: The Journal of Motor Behavior, a multidisciplinary journal of movement neuroscience, publishes articles that contribute to a basic understanding of motor control. Articles from different disciplinary perspectives and levels of analysis are encouraged, including neurophysiological, biomechanical, electrophysiological, psychological, mathematical and physical, and clinical approaches. Applied studies are acceptable only to the extent that they provide a significant contribution to a basic issue in motor control. Of special interest to the journal are those articles that attempt to bridge insights from different disciplinary perspectives to infer processes underlying motor control. Those approaches may embrace postural, locomotive, and manipulative aspects of motor functions, as well as coordination of speech articulators and eye movements. Articles dealing with analytical techniques and mathematical modeling are welcome.
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