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通过微刺激人体体感官皮层,对人工触摸进行特色化

Charles M Greenspon¹, Natalya D Shelchkova², Giacomo Valle¹

¹Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL.

bioRxiv : the preprint server for biology

|July 10, 2023

概括

人体感官皮层的内皮层微刺激 (ICMS) 可以为生物手提供触觉感觉. 多通道刺激创造了更多局部感觉,改善了生物手控制和感官反.

科学领域:

神经科学是一个神经科学.
生物医学工程生物医学工程
康复技术康复技术康复技术

背景情况:

人与物体的交互依赖于触觉反,而这种反往往无法在生物四肢控制中获得.
皮质内微刺激 (ICMS) 可以在体感皮质 (S1) 中唤起触觉,以获得生物手的反.
有效的感官反需要ICMS唤起的感觉是焦点,稳定,并分布在整个手.

研究的目的:

系统地调查ICMS引起的感觉的定位和空间范围.
了解ICMS感觉的投射场 (PF) 与神经元受体场 (RF) 之间的关系.
评估多通道刺激对改善生物手感觉局部化的有效性.

主要方法:

在三名使用S1微电极阵列的参与者中,分析了多年来ICMS引起的感觉的投射场 (PF).
调查的PF大小,稳定性,分布和振幅/频率依赖性.
检查了多通道刺激效应,并在生物手系统中实施了多通道ICMS反.

主要成果:

PFs在电极之间大小不同,每个电极都稳定,分布广泛,并且随着ICMS振幅/频率的增加而增加.
PF位置与神经元受体场 (RF) 位置相对应,PF经常被RF所包含.
多通道刺激导致PFs反映了组件PFs的结合,导致更局部的感觉.

结论:

由ICMS引起的感觉定位受电极特性和刺激参数的影响.
与单通道刺激相比,多通道刺激显著提高了ICMS引起的感觉的局部化.
这一发现对开发更直观,更有效的感官反系统对大脑控制的假肢产生影响.

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