Reliability of clinical office-based laryngeal electromyography in vocally healthy adults

Daniel J. Croake; Joseph C. Stemple; Timothy Uhl; Sanford Archer; Richard D. Andreatta

doi:10.1177/0003489414525022

Reliability of clinical office-based laryngeal electromyography in vocally healthy adults

Daniel J. Croake, Joseph C. Stemple, Timothy Uhl, Sanford Archer, Richard D. Andreatta

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Objective: This study aimed to conduct a 3-session reliability assessment of the laryngeal electromyography (LEMG) signal in healthy participants during intensity controlled vocalization tasks. We hypothesized that vocal intensity level and testing session would affect LEMG measures. Methods: This prospective study used a 2-factor repeated measures design. Seven participants underwent bipolar needle LEMG of the right thyroarytenoid muscle. Data were collected over 3 testing sessions using vocalization tasks performed with visually guided intensity feedback targets (65 and 75 dB SPL). Root mean square amplitudes in microvolts were analyzed for within-session and between-session reliability. Results: The main effect for intensity was found to approach significance (F = 5.71, P = .054). However, intraclass correlation coefficients (ICCs) using a 2-factor mixed random effect model indicated poor to fair signal reliability between testing sessions (ICC = 0.56 at 65 dB, 0.40 at 70 dB). Intraclass correlation coefficients for within-session data indicated excellent reliability for all testing conditions (0.84-0.98). Conclusion: Using a quantitative analysis protocol to inform an essentially qualitative technique, our results indicated that there was generally poor to fair reliability in the LEMG signal over testing sessions. Vocal intensity was an important variable that affected LEMG signal reliability. Standardization of LEMG protocols using vocal control parameters and quantitative analyses may help improve LEMG reliability in clinical settings.

Original language	English
Pages (from-to)	271-278
Number of pages	8
Journal	Annals of Otology, Rhinology and Laryngology
Volume	123
Issue number	4
DOIs	https://doi.org/10.1177/0003489414525022
State	Published - Apr 2014

Bibliographical note

Funding Information:
The authors would like to thank the participants for undergoing multiple LEMG procedures for this study, and the University of Kentucky College of Health Sciences Office of Research for supporting this project through pilot funding.

Keywords

LEMG
Motor units
Neuromuscular
Thyroarytenoid

ASJC Scopus subject areas

Otorhinolaryngology

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10.1177/0003489414525022

Cite this

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title = "Reliability of clinical office-based laryngeal electromyography in vocally healthy adults",

abstract = "Objective: This study aimed to conduct a 3-session reliability assessment of the laryngeal electromyography (LEMG) signal in healthy participants during intensity controlled vocalization tasks. We hypothesized that vocal intensity level and testing session would affect LEMG measures. Methods: This prospective study used a 2-factor repeated measures design. Seven participants underwent bipolar needle LEMG of the right thyroarytenoid muscle. Data were collected over 3 testing sessions using vocalization tasks performed with visually guided intensity feedback targets (65 and 75 dB SPL). Root mean square amplitudes in microvolts were analyzed for within-session and between-session reliability. Results: The main effect for intensity was found to approach significance (F = 5.71, P = .054). However, intraclass correlation coefficients (ICCs) using a 2-factor mixed random effect model indicated poor to fair signal reliability between testing sessions (ICC = 0.56 at 65 dB, 0.40 at 70 dB). Intraclass correlation coefficients for within-session data indicated excellent reliability for all testing conditions (0.84-0.98). Conclusion: Using a quantitative analysis protocol to inform an essentially qualitative technique, our results indicated that there was generally poor to fair reliability in the LEMG signal over testing sessions. Vocal intensity was an important variable that affected LEMG signal reliability. Standardization of LEMG protocols using vocal control parameters and quantitative analyses may help improve LEMG reliability in clinical settings.",

keywords = "LEMG, Motor units, Neuromuscular, Thyroarytenoid",

author = "Croake, {Daniel J.} and Stemple, {Joseph C.} and Timothy Uhl and Sanford Archer and Andreatta, {Richard D.}",

note = "Funding Information: The authors would like to thank the participants for undergoing multiple LEMG procedures for this study, and the University of Kentucky College of Health Sciences Office of Research for supporting this project through pilot funding. ",

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T1 - Reliability of clinical office-based laryngeal electromyography in vocally healthy adults

AU - Croake, Daniel J.

AU - Stemple, Joseph C.

AU - Uhl, Timothy

AU - Archer, Sanford

AU - Andreatta, Richard D.

N1 - Funding Information: The authors would like to thank the participants for undergoing multiple LEMG procedures for this study, and the University of Kentucky College of Health Sciences Office of Research for supporting this project through pilot funding.

PY - 2014/4

Y1 - 2014/4

N2 - Objective: This study aimed to conduct a 3-session reliability assessment of the laryngeal electromyography (LEMG) signal in healthy participants during intensity controlled vocalization tasks. We hypothesized that vocal intensity level and testing session would affect LEMG measures. Methods: This prospective study used a 2-factor repeated measures design. Seven participants underwent bipolar needle LEMG of the right thyroarytenoid muscle. Data were collected over 3 testing sessions using vocalization tasks performed with visually guided intensity feedback targets (65 and 75 dB SPL). Root mean square amplitudes in microvolts were analyzed for within-session and between-session reliability. Results: The main effect for intensity was found to approach significance (F = 5.71, P = .054). However, intraclass correlation coefficients (ICCs) using a 2-factor mixed random effect model indicated poor to fair signal reliability between testing sessions (ICC = 0.56 at 65 dB, 0.40 at 70 dB). Intraclass correlation coefficients for within-session data indicated excellent reliability for all testing conditions (0.84-0.98). Conclusion: Using a quantitative analysis protocol to inform an essentially qualitative technique, our results indicated that there was generally poor to fair reliability in the LEMG signal over testing sessions. Vocal intensity was an important variable that affected LEMG signal reliability. Standardization of LEMG protocols using vocal control parameters and quantitative analyses may help improve LEMG reliability in clinical settings.

AB - Objective: This study aimed to conduct a 3-session reliability assessment of the laryngeal electromyography (LEMG) signal in healthy participants during intensity controlled vocalization tasks. We hypothesized that vocal intensity level and testing session would affect LEMG measures. Methods: This prospective study used a 2-factor repeated measures design. Seven participants underwent bipolar needle LEMG of the right thyroarytenoid muscle. Data were collected over 3 testing sessions using vocalization tasks performed with visually guided intensity feedback targets (65 and 75 dB SPL). Root mean square amplitudes in microvolts were analyzed for within-session and between-session reliability. Results: The main effect for intensity was found to approach significance (F = 5.71, P = .054). However, intraclass correlation coefficients (ICCs) using a 2-factor mixed random effect model indicated poor to fair signal reliability between testing sessions (ICC = 0.56 at 65 dB, 0.40 at 70 dB). Intraclass correlation coefficients for within-session data indicated excellent reliability for all testing conditions (0.84-0.98). Conclusion: Using a quantitative analysis protocol to inform an essentially qualitative technique, our results indicated that there was generally poor to fair reliability in the LEMG signal over testing sessions. Vocal intensity was an important variable that affected LEMG signal reliability. Standardization of LEMG protocols using vocal control parameters and quantitative analyses may help improve LEMG reliability in clinical settings.

KW - LEMG

KW - Motor units

KW - Neuromuscular

KW - Thyroarytenoid

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Reliability of clinical office-based laryngeal electromyography in vocally healthy adults

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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