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Concentric needle electrode duration measurement and uptake area
Author(s) -
Nandedkar Sanjeev D.,
Dumitru Daniel,
King John C.
Publication year - 1997
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/(sici)1097-4598(199710)20:10<1225::aid-mus3>3.0.co;2-e
Subject(s) - concentric , motor unit , biceps , duration (music) , biomedical engineering , anatomy , rotation (mathematics) , electrode , electromyography , bevel , materials science , medicine , mathematics , physics , acoustics , physical medicine and rehabilitation , geometry , quantum mechanics , structural engineering , engineering
Motor unit action potentials (MUAPs) were recorded with a standard concentric needle electrode inserted into the right biceps brachii muscle with different angular orientations of the beveled recording surface to the muscle fibers. Contrary to the predictions from computer simulations, the MUAP duration remained constant during needle rotation. This finding is used to reexamine the previous assumptions regarding the concentric needle's spatial uptake recording territory and the implications with respect to MUAP duration measurements. © 1997 John Wiley & Sons, Inc. Muscle Nerve 20: 1225–1228, 1997