Optimizing Populations of SAI Tactile Mechanoreceptors to Enable Activities of Daily Living.
Optimizing Populations of SAI Tactile Mechanoreceptors to Enable Activities of Daily Living.
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DOI：
10.1109/whc.2011.5945461
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发表时间：
2011-07-11
期刊：
影响因子：
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通讯作者：
Gerling GJ
中科院分区：
文献类型：
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作者：
Rivest II;Gerling GJ
目前，手指和大脑之间密集的外周传入网络和大尺寸的工程传感器排除了生物学观察到的传入群体的重建。这项工作使用了一个经过验证的计算模型的皮肤和触觉传入评估稀疏人口在执行任务所需的日常生活活动。使用模型（指尖皮肤的3D有限元表示，线性双相转导功能，和泄漏整合和发射神经元模型），我们系统地改变触觉感受器的密度尺寸的人口（100、45、20和10个探头/cm 2）和尺寸（直径0.1，0.2，0.5，和1.0mm），以确定给定的建模群体是否能够区分代表日常生活活动中使用的物体的球体和圆柱体。使用一个评分系统，它允许人口之间的直接比较，我们的研究结果表明，人口必须有至少20个传感器每平方厘米，以保持响应分辨率在这些活动的日常生活和较大尺寸的传感器不降低响应分辨率。
At present, the dense network of peripheral afferents between finger and brain and the large size of engineered sensors preclude the recreation of biologically observed afferent populations. This work uses a validated computational model of cutaneous skin and tactile afferents to evaluate sparse populations in performing tasks required in activities of daily living. Using a model (3D finite element representation of fingertip skin, linear bi-phasic transduction function, and leaky-integrate-and-fire neuronal model), we systematically varied populations of tactile receptors in dimensions of density (100, 45, 20, and 10 sensors/cm2) and size (diameter 0.1, 0.2, 0.5, and 1.0 mm) to determine if a given modeled population can discriminate spheres and cylinders representative of objects used in activities of daily living. Using a scoring system which allows for direct comparisons between the populations, our results indicate that a population must have at least 20 sensors per cm2 to maintain response resolution in these activities of daily living and that larger-sized sensors do not degrade response resolution.