近端肌肉的振动刺激不影响远端神经刺激后体感诱发电位的皮质成分。
Vibratory stimulation of proximal muscles does not affect cortical components of somatosensory evoked potential following distal nerve stimulation.
作者信息
Hoshiyama M, Kakigi R
机构信息
Department of Integrative Physiology, National Institute for Physiological Sciences, Myodaiji, 444-8585, Okazaki, Japan.
出版信息
Clin Neurophysiol. 2000 Sep;111(9):1607-10. doi: 10.1016/s1388-2457(00)00369-2.
OBJECTIVES
The effects of the proprioceptive activity of the proximal muscles on somatosensory evoked potentials (SEPs) were investigated, using vibratory stimulation of proximal muscle tendons.
METHODS
SEPs were recorded following electrical median nerve stimulation at the wrist during vibratory stimulation of tendon of pronator teres, biceps and trapezius muscles and fingers in 8 normal subjects.
RESULTS
The cortical SEP components, N20, P25 and N33 recorded from the parietal area, and P20 and N30 recorded from frontal area contralateral to the stimulated side, were markedly attenuated by vibratory stimulation applied to the fingers, but unaffected by vibratory stimulation of the proximal muscles.
CONCLUSION
The proprioceptive afferent, especially group Ia muscle spindle afferent, in the relaxed proximal muscles is not likely to contribute to the gating of SEP following distal nerve stimulation.
目的
通过对近端肌腱进行振动刺激，研究近端肌肉的本体感觉活动对体感诱发电位（SEP）的影响。
方法
对8名正常受试者在旋前圆肌、肱二头肌、斜方肌肌腱以及手指进行振动刺激时，在腕部对正中神经进行电刺激后记录SEP。
结果
从顶叶区域记录的皮质SEP成分N20、P25和N33，以及从受刺激侧对侧额叶区域记录的P20和N30，在手指进行振动刺激时明显衰减，但在近端肌肉进行振动刺激时未受影响。
结论
放松的近端肌肉中的本体感觉传入神经，尤其是Ia类肌梭传入神经，不太可能在远端神经刺激后对SEP的闸门控制起作用。
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