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Laryngeal muscle activity in unilateral vocal fold paralysis patients using electromyography and coronal reconstructed images.
Otolaryngol Head Neck Surg. 2014 Apr; 150(4):625-30.OH

Abstract

OBJECTIVE

To assess laryngeal muscle activity in unilateral vocal fold paralysis (UVFP) patients using laryngeal electromyography (LEMG) and coronal images.

STUDY DESIGN

Case series with chart review.

SETTING

University hospital.

SUBJECTS AND METHODS

Twenty-one patients diagnosed with UVFP of at least 6 months in duration with paralytic dysphonia, underwent LEMG, phonatory function tests, and coronal imaging. A 4-point scale was used to grade motor unit (MU) recruitment: absent = 4+, greatly decreased = 3+, moderately decreased = 2+, and mildly decreased = 1+. Maximum phonation time (MPT) and mean flow rate (MFR) were employed. Coronal images were assessed for differences in thickness and vertical position of the vocal folds during phonation and inhalation.

RESULTS

MU recruitment in thyroarytenoid/lateral cricoarytenoid (TA/LCA) muscle complex results were 1+ for 4 patients, 2+ for 5, 3+ for 6, and 4+ for 6. MPT was positively correlated with MU recruitment. Thinning of the affected fold was evident during phonation in 19 of the 21 subjects. The affected fold was at an equal level with the healthy fold in all 9 subjects with MU recruitment of 1+ and 2+. Eleven of 12 subjects with MU recruitments of 3+ and 4+ showed the affected fold at a higher level than the healthy fold. There was a significant difference between MU recruitment and the vertical position of the affected fold.

CONCLUSIONS

Synkinetic reinnervation may occur in some cases with UVFP. MU recruitments of TA/LCA muscle complex in UVFP patients may be related to phonatory function and the vertical position of the affected fold.

Authors+Show Affiliations

Department of Otolaryngology-Head and Neck Surgery, Graduate School of Medicine, Kumamoto University, Kumamoto, Japan.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Evaluation Study
Journal Article

Language

eng

PubMed ID

24493787

Citation

Sanuki, Tetsuji, et al. "Laryngeal Muscle Activity in Unilateral Vocal Fold Paralysis Patients Using Electromyography and Coronal Reconstructed Images." Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery, vol. 150, no. 4, 2014, pp. 625-30.
Sanuki T, Yumoto E, Nishimoto K, et al. Laryngeal muscle activity in unilateral vocal fold paralysis patients using electromyography and coronal reconstructed images. Otolaryngol Head Neck Surg. 2014;150(4):625-30.
Sanuki, T., Yumoto, E., Nishimoto, K., & Minoda, R. (2014). Laryngeal muscle activity in unilateral vocal fold paralysis patients using electromyography and coronal reconstructed images. Otolaryngology--head and Neck Surgery : Official Journal of American Academy of Otolaryngology-Head and Neck Surgery, 150(4), 625-30. https://doi.org/10.1177/0194599814520999
Sanuki T, et al. Laryngeal Muscle Activity in Unilateral Vocal Fold Paralysis Patients Using Electromyography and Coronal Reconstructed Images. Otolaryngol Head Neck Surg. 2014;150(4):625-30. PubMed PMID: 24493787.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Laryngeal muscle activity in unilateral vocal fold paralysis patients using electromyography and coronal reconstructed images. AU - Sanuki,Tetsuji, AU - Yumoto,Eiji, AU - Nishimoto,Kohei, AU - Minoda,Ryosei, Y1 - 2014/02/03/ PY - 2014/2/5/entrez PY - 2014/2/5/pubmed PY - 2014/5/30/medline KW - CT images KW - laryngeal electromyography KW - synkinesis KW - unilateral vocal fold paralysis SP - 625 EP - 30 JF - Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery JO - Otolaryngol Head Neck Surg VL - 150 IS - 4 N2 - OBJECTIVE: To assess laryngeal muscle activity in unilateral vocal fold paralysis (UVFP) patients using laryngeal electromyography (LEMG) and coronal images. STUDY DESIGN: Case series with chart review. SETTING: University hospital. SUBJECTS AND METHODS: Twenty-one patients diagnosed with UVFP of at least 6 months in duration with paralytic dysphonia, underwent LEMG, phonatory function tests, and coronal imaging. A 4-point scale was used to grade motor unit (MU) recruitment: absent = 4+, greatly decreased = 3+, moderately decreased = 2+, and mildly decreased = 1+. Maximum phonation time (MPT) and mean flow rate (MFR) were employed. Coronal images were assessed for differences in thickness and vertical position of the vocal folds during phonation and inhalation. RESULTS: MU recruitment in thyroarytenoid/lateral cricoarytenoid (TA/LCA) muscle complex results were 1+ for 4 patients, 2+ for 5, 3+ for 6, and 4+ for 6. MPT was positively correlated with MU recruitment. Thinning of the affected fold was evident during phonation in 19 of the 21 subjects. The affected fold was at an equal level with the healthy fold in all 9 subjects with MU recruitment of 1+ and 2+. Eleven of 12 subjects with MU recruitments of 3+ and 4+ showed the affected fold at a higher level than the healthy fold. There was a significant difference between MU recruitment and the vertical position of the affected fold. CONCLUSIONS: Synkinetic reinnervation may occur in some cases with UVFP. MU recruitments of TA/LCA muscle complex in UVFP patients may be related to phonatory function and the vertical position of the affected fold. SN - 1097-6817 UR - https://www.unboundmedicine.com/medline/citation/24493787/Laryngeal_muscle_activity_in_unilateral_vocal_fold_paralysis_patients_using_electromyography_and_coronal_reconstructed_images_ L2 - http://journals.sagepub.com/doi/full/10.1177/0194599814520999?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -