Document Detail

Activity patterns in latissimus dorsi and sternocleidomastoid in classical singers.
MedLine Citation:
PMID:  21724365     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: The aim of this study was to investigate and compare the roles of the accessory respiratory muscles, latissimus dorsi (LD), and sternocleidomastoid, in classical singing.
METHODS: Electromyography was used to record the activity of these muscles in six classically trained female singers carrying out a number of singing and nonsinging tasks. Movements of the chest and abdominal walls were monitored simultaneously using inductive plethysmography, and the sound of the phonations was recorded.
RESULTS: In normal breathing, LD is active transiently during very deep inhalations and in inhalation against resistance. During exhalation it becomes active again as residual capacity is approached or when air is expelled with great force. Sternocleidomastoid (SCM) supports inhalation when lung volume nears 100% vital capacity or when this is very rapid. All singers engaged LD in supported singing where it was associated with maintaining an expanded thorax. In coloratura singing, pulses of activity of increasing amplitude were often seen in LD toward the end of the breath. These were synchronized with each note. During a short phrase typical of the end of an aria, which was sung at full volume with the projected voice, both LD and SCM were active simultaneously. Spectral analysis of muscle activity demonstrated that in some singers, activity in LD and more rarely SCM, fluctuated in phase with vibrato.
CONCLUSIONS: LD appears to play a significant role in maintaining chest expansion and the dynamic processes underlying vibrato and coloratura singing in classically trained singers.
Alan H D Watson; Caitlin Williams; Buddug V James
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-07-02
Journal Detail:
Title:  Journal of voice : official journal of the Voice Foundation     Volume:  26     ISSN:  1873-4588     ISO Abbreviation:  J Voice     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-05-04     Completed Date:  2012-08-24     Revised Date:  2013-06-28    
Medline Journal Info:
Nlm Unique ID:  8712262     Medline TA:  J Voice     Country:  United States    
Other Details:
Languages:  eng     Pagination:  e95-e105     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 The Voice Foundation. Published by Mosby, Inc. All rights reserved.
School of Biosciences, Cardiff University, Cardiff, Wales, UK.
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MeSH Terms
Action Potentials
Airway Resistance
Middle Aged
Respiratory Mechanics*
Respiratory Muscles / innervation,  physiology*
Signal Processing, Computer-Assisted
Sound Spectrography
Speech Production Measurement
Time Factors
Vital Capacity
Voice Quality*
Young Adult
Grant Support
//Wellcome Trust

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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