Concentric and single fiber electrode spatial recording characteristics

John C. King, Daniel Dumitru, Sanjeev Nandedkar

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A better appreciation of the specific spatial recording characteristics of the single fiber and concentric needle electrode can result in mere accurate physiologic and theoretical interpretations of single fiber and quantitative motor unit action potential analysis. We demonstrate by physical modeling that the 90% and 99% amplitude sensitivity envelopes are not simple hemispherical shapes. The 90% sensitivity concentric electrode volume does not extend beyond the insulated portion of the 15°beveled surface between the core and cannula and extends only 280 μm perpendicularly from the center of the cora's surface. The 99% envelope extends approximately 830 μm perpendicularly from the core's center. This is a much smaller volume of sensitivity than exists for a similarly modeled monopolar electrode. The 90% and 99% envelopes extend to 110 and 320 μm perpendicularly from the exposed single fiber core. Both the single fiber and concentric needle volumes of sensitivity have specific asymmetries described.

Original languageEnglish (US)
Pages (from-to)1525-1533
Number of pages9
JournalMuscle and Nerve
Volume20
Issue number12
DOIs
StatePublished - 1997

Fingerprint

Electrodes
Needles
Action Potentials
Cannula

Keywords

  • Concentric
  • Electrode modeling
  • Electrodes
  • Electrodiagnosis
  • Instrumentation
  • Motor unit action potential
  • Single fiber

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

Cite this

Concentric and single fiber electrode spatial recording characteristics. / King, John C.; Dumitru, Daniel; Nandedkar, Sanjeev.

In: Muscle and Nerve, Vol. 20, No. 12, 1997, p. 1525-1533.

Research output: Contribution to journalArticle

King, John C. ; Dumitru, Daniel ; Nandedkar, Sanjeev. / Concentric and single fiber electrode spatial recording characteristics. In: Muscle and Nerve. 1997 ; Vol. 20, No. 12. pp. 1525-1533.
@article{5bbec081b2cf4dd6ad56a9c5d5985278,
title = "Concentric and single fiber electrode spatial recording characteristics",
abstract = "A better appreciation of the specific spatial recording characteristics of the single fiber and concentric needle electrode can result in mere accurate physiologic and theoretical interpretations of single fiber and quantitative motor unit action potential analysis. We demonstrate by physical modeling that the 90{\%} and 99{\%} amplitude sensitivity envelopes are not simple hemispherical shapes. The 90{\%} sensitivity concentric electrode volume does not extend beyond the insulated portion of the 15°beveled surface between the core and cannula and extends only 280 μm perpendicularly from the center of the cora's surface. The 99{\%} envelope extends approximately 830 μm perpendicularly from the core's center. This is a much smaller volume of sensitivity than exists for a similarly modeled monopolar electrode. The 90{\%} and 99{\%} envelopes extend to 110 and 320 μm perpendicularly from the exposed single fiber core. Both the single fiber and concentric needle volumes of sensitivity have specific asymmetries described.",
keywords = "Concentric, Electrode modeling, Electrodes, Electrodiagnosis, Instrumentation, Motor unit action potential, Single fiber",
author = "King, {John C.} and Daniel Dumitru and Sanjeev Nandedkar",
year = "1997",
doi = "10.1002/(SICI)1097-4598(199712)20:12<1525::AID-MUS7>3.0.CO;2-A",
language = "English (US)",
volume = "20",
pages = "1525--1533",
journal = "Muscle and Nerve",
issn = "0148-639X",
publisher = "John Wiley and Sons Inc.",
number = "12",

}

TY - JOUR

T1 - Concentric and single fiber electrode spatial recording characteristics

AU - King, John C.

AU - Dumitru, Daniel

AU - Nandedkar, Sanjeev

PY - 1997

Y1 - 1997

N2 - A better appreciation of the specific spatial recording characteristics of the single fiber and concentric needle electrode can result in mere accurate physiologic and theoretical interpretations of single fiber and quantitative motor unit action potential analysis. We demonstrate by physical modeling that the 90% and 99% amplitude sensitivity envelopes are not simple hemispherical shapes. The 90% sensitivity concentric electrode volume does not extend beyond the insulated portion of the 15°beveled surface between the core and cannula and extends only 280 μm perpendicularly from the center of the cora's surface. The 99% envelope extends approximately 830 μm perpendicularly from the core's center. This is a much smaller volume of sensitivity than exists for a similarly modeled monopolar electrode. The 90% and 99% envelopes extend to 110 and 320 μm perpendicularly from the exposed single fiber core. Both the single fiber and concentric needle volumes of sensitivity have specific asymmetries described.

AB - A better appreciation of the specific spatial recording characteristics of the single fiber and concentric needle electrode can result in mere accurate physiologic and theoretical interpretations of single fiber and quantitative motor unit action potential analysis. We demonstrate by physical modeling that the 90% and 99% amplitude sensitivity envelopes are not simple hemispherical shapes. The 90% sensitivity concentric electrode volume does not extend beyond the insulated portion of the 15°beveled surface between the core and cannula and extends only 280 μm perpendicularly from the center of the cora's surface. The 99% envelope extends approximately 830 μm perpendicularly from the core's center. This is a much smaller volume of sensitivity than exists for a similarly modeled monopolar electrode. The 90% and 99% envelopes extend to 110 and 320 μm perpendicularly from the exposed single fiber core. Both the single fiber and concentric needle volumes of sensitivity have specific asymmetries described.

KW - Concentric

KW - Electrode modeling

KW - Electrodes

KW - Electrodiagnosis

KW - Instrumentation

KW - Motor unit action potential

KW - Single fiber

UR - http://www.scopus.com/inward/record.url?scp=0030774089&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030774089&partnerID=8YFLogxK

U2 - 10.1002/(SICI)1097-4598(199712)20:12<1525::AID-MUS7>3.0.CO;2-A

DO - 10.1002/(SICI)1097-4598(199712)20:12<1525::AID-MUS7>3.0.CO;2-A

M3 - Article

C2 - 9390665

AN - SCOPUS:0030774089

VL - 20

SP - 1525

EP - 1533

JO - Muscle and Nerve

JF - Muscle and Nerve

SN - 0148-639X

IS - 12

ER -