QUANTITATIVE-ANALYSIS OF STATIC STRAIN SENSITIVITY IN HUMAN MECHANORECEPTORS FROM HAIRY SKIN
QUANTITATIVE-ANALYSIS OF STATIC STRAIN SENSITIVITY IN HUMAN MECHANORECEPTORS FROM HAIRY SKIN
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DOI：
10.1152/jn.1992.67.5.1105
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发表时间：
1992-05-01
影响因子：
2.5
通讯作者：
EDIN, BB
中科院分区：
文献类型：
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作者：
EDIN, BB
1.在人桡神经获得了15个起源于多毛皮肤的慢适应（SA）皮肤机械感受器传入的微电极记录.在掌指关节运动过程中，对手背施加控制性皮肤拉伸，包括皮肤拉伸的生理范围。SA组I和II的传入表现出精致的动态和静态敏感性皮肤拉伸。对于SAI单位和SAII单位，平均静态应变灵敏度分别为1.0 imp.s-1/ %皮肤拉伸。转化为对MCP关节运动的敏感性，手背皮肤中的SAI和SAII传入都显示出与肌梭传入相当的位置敏感性。这些数据提供定量支持的建议，皮肤受体在人类毛茸茸的皮肤提供信息附近的关节配置，因此可能发挥特定的作用，本体感觉，动觉和运动控制。
1. Microelectrode recordings from 15 slowly adapting (SA) cutaneous mechanoreceptor afferents originating in hairy skin were obtained from the radial nerve in humans.2. Controlled skin stretch was applied to the back of the hand that encompassed the physiological range of skin stretch during movements at the metacarpophalangeal (MCP) joints.3. Both SA Group I and II afferents showed exquisite dynamic and static sensitivity to skin stretch. The median static strain sensitivity was 1.0 imp.s-1 per percent skin stretch for SAI units and 1.8 for SAII units.4. Translated into sensitivity to movements at the MCP joint, both SAI and SAII afferents in the skin of the back of the hand displayed a positional sensitivity that was comparable with that reported for muscle spindle afferents.5. These data give quantitative support to suggestions that skin receptors in the human hairy skin provide information on nearby joint configurations and therefore may play a specific role in proprioception, kinesthesia, and motor control.