Cohen L G, Starr A, Pratt H
Brain. 1985 Mar;108 ( Pt 1):103-21. doi: 10.1093/brain/108.1.103.
Somatosensory cerebral evoked potentials were recorded in man to natural forms of somatosensory stimulation of the lower extremity including stretching of the muscle tendons, tapping on muscle bellies and tapping on cutaneous surfaces. These potentials were compared with those evoked by electrical stimulation of peripheral nerves measuring the amplitudes and latencies of the evoked potential components and defining the effects of stimulus variables on these parameters. Spinal cord potentials could only be detected to electrical stimuli. Mechanical stimulation of tendons and muscle bellies evoked scalp potentials at latencies earlier than those evoked by electrical stimulation of the peripheral nerve and by cutaneous stimulation at the same level of the leg. Muscle receptors, most probably muscle spindles, are the source of the short latency components obtained by the stretching of tendons and tapping on muscle bellies. The proximal location of these receptors as well as very rapid spinal conduction account for the latency difference. The potentials were larger to electrical stimulation of nerve trunks than to mechanical stimulation of tendons or skin, suggesting the asynchronous activation of a smaller number of fibres by the latter. Individuals with the largest potentials to one form of stimulation usually had the largest potentials to the other modes of stimulation. The use of physiological stimuli such as muscle stretch to test the transmission in specific neural pathways might be useful in investigating the processing of relatively selective afferent volleys using noninvasive evoked potential recordings.
在人体中记录了体感诱发电位，该电位是对下肢的自然体感刺激形式产生的，包括肌腱拉伸、肌肉腹部轻敲和皮肤表面轻敲。将这些电位与通过电刺激外周神经诱发的电位进行比较，测量诱发电位成分的幅度和潜伏期，并确定刺激变量对这些参数的影响。脊髓电位只能通过电刺激检测到。肌腱和肌肉腹部的机械刺激诱发头皮电位的潜伏期早于外周神经电刺激和腿部同一水平皮肤刺激诱发的潜伏期。肌肉感受器，很可能是肌梭，是通过肌腱拉伸和肌肉腹部轻敲获得的短潜伏期成分的来源。这些感受器的近端位置以及非常快速的脊髓传导解释了潜伏期差异。神经干的电刺激诱发出的电位比肌腱或皮肤的机械刺激诱发出的电位更大，这表明后者异步激活了数量较少的纤维。对一种刺激形式电位最大的个体通常对其他刺激模式的电位也最大。使用生理刺激（如肌肉拉伸）来测试特定神经通路中的传导，可能有助于利用非侵入性诱发电位记录来研究相对选择性传入冲动的处理过程。
