Gavrilenko T, Gantchev G N, Ioffe M, Dimitrov B
Motor Control Section, Bulgarian Academy of Sciences, Sofia.
Electromyogr Clin Neurophysiol. 1993 Apr-May;33(3):143-8.
The aim of the study was to assess the influence of a biphasic flexion-extension movement upon somatosensory evoked potentials (SEPs). Voluntary thumb flexion initiated a sequence of either single or single PLUS sustained electrical stimulation upon the median nerve. In cases of sustained stimulation the subjects had to overcome the induced tetanic thumb flexion. During movements the latencies of early components were longer compared to rest; during simple movements the amplitudes of most components were diminished compared to rest; the amplitudes of early components were further diminished in movements against tetanic contraction compared to simple ones; the suppression of SEP amplitudes was similar regardless of possibility to overcome the opposing tetanic contraction; the changes in SEP amplitudes were not dependent on training.
该研究的目的是评估双相屈伸运动对体感诱发电位（SEP）的影响。自主拇指屈曲会引发对正中神经的单次或单次加持续电刺激序列。在持续刺激的情况下，受试者必须克服诱发的强直性拇指屈曲。运动期间，早期成分的潜伏期比静息时更长；在简单运动期间，大多数成分的波幅比静息时减小；与简单运动相比，对抗强直性收缩运动时早期成分的波幅进一步减小；无论是否有可能克服对抗性强直性收缩，SEP波幅的抑制情况相似；SEP波幅的变化不依赖于训练。
