Concentric needle electrode duration measurement and uptake area

Sanjeev D. Nandedkar, Daniel Dumitru, John C King

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1225-1228
Number of pages4
JournalMuscle and Nerve
Issue number10
StatePublished - 1997
Externally publishedYes


  • Computer simulations
  • Concentric needle
  • Motor unit action potential duration
  • Motor unit recording territory
  • Volume conduction

ASJC Scopus subject areas

  • Clinical Neurology
  • Physiology (medical)
  • Cellular and Molecular Neuroscience
  • Physiology


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