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首页> 外文期刊>Journal of hand therapy: Official journal of the American Society of Hand Therapists >Contribution of peripheral input to length discrimination during use of a precision grip.
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Contribution of peripheral input to length discrimination during use of a precision grip.

机译：在使用精密手柄时，外围输入对长度识别的贡献。

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摘要

This study examined the ability of 63 subjects to discriminate a length difference, using a precision grip with the thumb and the index finger. To assess the relative contribution of different peripheral inputs associated with the discriminative ability of precision grip, three tasks were performed under each of three conditions-normal conditions; when vibratory stimuli were delivered to the forearm muscles; and when a local anesthetic was administered to the index finger. Under the first and second conditions, the length difference detected most frequently was 2.0 mm; in the third task, it was 3.0 mm. When a 100-Hz vibratory stimulus was applied to the forearm muscles, no difference in the threshold for length discrimination was observed for three of seven subjects. After injection of lidocaine into the metacarpophalangeal joint of the index finger, the threshold for length discrimination was significantly different for five of seven subjects. The detected length difference ranged from 1.0 to 4.0 mm. The authors question whether a single peripheral input is likely to make a major contribution to the complex perception that is used for discrimination tasks.
机译：这项研究使用拇指和食指精确抓握，检查了63位受试者辨别长度差异的能力。为了评估与精确抓地力的判别能力相关的不同外围输入的相对贡献，在三个条件（正常条件）下分别执行了三个任务。当振动刺激传递到前臂肌肉时;当对食指进行局部麻醉时。在第一和第二条件下，最常检测到的长度差为2.0毫米。在第三项任务中，它是3.0毫米。当对前臂肌肉施加100 Hz的振动刺激时，对于七个受试者中的三个受试者，没有观察到长度歧视的阈值差异。将利多卡因注射进食指的掌指关节后，长度区分的阈值对于七个受试者中的五个受试者有显着差异。检测到的长度差在1.0至4.0mm的范围内。作者质疑单个外围输入是否可能对用于识别任务的复杂感知做出重大贡献。

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