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首页> 外文期刊>Gait & posture >Comparison of tap-evoked and tone-evoked postural reflexes in humans.
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Comparison of tap-evoked and tone-evoked postural reflexes in humans.

机译：人中踢踏诱发的和语气诱发的姿势反射的比较。

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摘要

To find an easy clinical test of postural reflexes, we compared tone and tap stimuli for eliciting postural reactions in leg muscles in 13 healthy subjects during upright stance. Tones (1000 Hz, 90 dB nHl) were presented monaurally via headphones; taps were applied with a reflex hammer to the forehead. Surface EMG was recorded from the medial gastrocnemius and the sternocleidomastoid muscles, and rectified and averaged. Tapping the forehead of a standing subject evoked leg muscle reflexes that began 50 ms after the stimulus in all subjects. Tone-evoked leg muscle reflexes behaved differently, i.e., they had smaller amplitudes and could be recorded in only 5 of 13 subjects. However, this same acoustic stimulus elicited reflex activity in the neck muscles of all subjects. There were also other differences (amplitudes, dependence on pre-activation) between these two reflexes. Tone-evoked leg muscle responses and tone-evoked neck muscle responses seem to be mediated by different structures, i.e., the latter by an oligosynaptic pathway and the former by polysynaptic neural circuits. We conclude that tap-evoked leg muscle responses are not or not solely mediated by saccular receptors but other receptors (i.e., proprioceptors, semicircular canals) are probably also involved.
机译：为了找到简单的姿势反射临床测试方法，我们比较了直立姿势期间13位健康受试者的口气和敲打刺激在腿部肌肉中引起姿势反应的情况。通过耳机非立体声地显示音调（1000 Hz，90 dB nHl）。用反射锤将水龙头贴在额头上。从内侧腓肠肌和胸锁乳突肌记录表面肌电图，并校正并取平均值。轻拍站立受试者的前额会引起腿部肌肉反射，该反射在所有受试者刺激后50毫秒开始。音调诱发的腿部肌肉反射的行为有所不同，即它们的振幅较小，只能在13个受试者中记录5个。然而，这种相同的声音刺激在所有受试者的颈部肌肉中引起了反射活动。这两个反射之间还存在其他差异（振幅，对预激活的依赖性）。音调诱发的腿部肌肉反应和音调诱发的颈部肌肉反应似乎由不同的结构介导，即后者通过寡突触途径而前者通过多突触神经回路介导。我们得出的结论是，踢踏诱发的腿部肌肉反应并非或仅由囊性受体介导，而其他受体（即本体感受器，半规管）也可能参与其中。

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