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Needle electromyographic examination constitutes the only neurophysiological test used routinely to assess the integrity of proximal nerve pathways. A heteronymous reflex, with a latency consistent with a monosynaptic pathway, can be evoked in the contracting biceps brachii muscle by stimulation of the median nerve at the elbow. This reflex response provides a complementary technique to the biceps...
The present study provides normal data for a new technique to assess conduction across the C5 segments by recording a heteronymous monosynaptic reflex response from the contracting biceps brachii in response to stimulation of the median nerve in the cubital fossa. The reflex responses were reproducible and symmetrical, with a mean latency of 14.8 msec (S.D. 1.4 msec) and an absolute side-to-side...
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