Effects of evoked pain on the electromyogram and compound muscle action potential of the brachial biceps muscle
β Scribed by Erisela Qerama; Anders Fuglsang-Frederiksen; Helge Kasch; Flemming W. Bach; Troels Staehelin Jensen
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 324 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0148-639X
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## Abstract Compound muscle action potential (CMAP) onset latency is interpreted to reflect the arrival time at the muscle of impulses in the fastestβconducting motor nerve fiber. However, we have observed that the position of the reference or indifferent electrode (E2) affects CMAP onset latency.
The contributions of the various ulnar-innervated muscles of the hand to the hypothenar compound muscle action potential (CMAP) were estimated by directly stimulating individual muscles and by analyzing CMAP shape changes resulting from manipulations that changed individual muscle lengths. The resul