The reflex responses of single motor units in human first dorsal interosseous muscle following cutaneous afferent stimulation.
The reflex responses of single motor units in human first dorsal interosseous muscle following cutaneous afferent stimulation.
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皮肤传入刺激后人体第一背侧骨间肌单个运动单位的反射反应。
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
J. Stephens
中科院分区：
文献类型：
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作者：
R. Garnett;J. Stephens
1.研究了人第一骨间背侧肌在皮肤传入刺激下自主收缩时活动运动单位放电概率的变化。2.电刺激食指指神经产生一种由三个阶段组成的反射反应，即早期兴奋、抑制和晚期兴奋。3.在自主收缩强度较低时招募的运动单位比在较高强度下招募的运动单位具有更大的早期抑制和晚期兴奋反应。4.综合短潜伏期兴奋性和抑制性反应的大小，在自主收缩强度较低和收缩时间较慢的情况下，招募的单位以抑制性反应为主。相比之下，短潜伏期兴奋性反应占主导地位的单位有较快的抽搐收缩时间，并在高水平的收缩强度下招募。5.对于皮肤反射通路，撞击第一骨间运动神经元的兴奋性和抑制性神经元之间的平衡存在差异，这与支配的肌肉单位的种类有关。
1. Changes in the probability of firing of motor units active during voluntary muscle contraction have been studied in human first dorsal interosseous muscle in response to cutaneous afferent stimulation. 2. Electrical stimulation of the digital nerves of the index finger produces a reflex response consisting of three phases, early excitation followed by inhibition followed by late excitation. 3. Motor units recruited at low levels of voluntary contraction strength had larger early inhibitory and larger late excitatory responses than those recruited at higher levels of force. 4. Taking together the size of the short latency excitatory and inhibitory responses, units recruited at low levels of voluntary contraction strength and with slow twitch contraction times had predominantly inhibitory responses. In contrast, units in which the short latency excitatory responses predominated had fast twitch contraction times and were recruited at high levels of contraction strength. 5. It is concluded that for the cutaneous reflex pathway there are differences in the balance of excitatory and inhibitory sets of interneurones impinging on first dorsal interosseous motoneurones which are related to the kind of muscle unit innervated.