scholarly journals Effects of a Semioccluded Vocal Tract on Laryngeal Muscle Activity and Glottal Adduction in a Single Female Subject

2008 ◽  
Vol 60 (6) ◽  
pp. 298-311 ◽  
Author(s):  
Anne-Maria Laukkanen ◽  
Ingo R. Titze ◽  
Henry Hoffman ◽  
Eileen Finnegan
Keyword(s):  
Muscle Activity ◽  
Female Subject ◽  
Vocal Tract ◽  
Single Female ◽  
Laryngeal Muscle

scholarly journals Subglottal pressure, tracheal airflow, and intrinsic laryngeal muscle activity during rat ultrasound vocalization

2011 ◽  
Vol 106 (5) ◽  
pp. 2580-2592 ◽  
Author(s):  
Tobias Riede
Keyword(s):  
Fundamental Frequency ◽  
Muscle Activity ◽  
Vocal Tract ◽  
Male Rats ◽  
Emg Activity ◽  
Laryngeal Muscles ◽  
Laryngeal Muscle ◽  
Subglottal Pressure ◽  
Ultrasound Vocalization ◽  
Intrinsic Laryngeal Muscles

Vocal production requires complex planning and coordination of respiratory, laryngeal, and vocal tract movements, which are incompletely understood in most mammals. Rats produce a variety of whistles in the ultrasonic range that are of communicative relevance and of importance as a model system, but the sources of acoustic variability were mostly unknown. The goal was to identify sources of fundamental frequency variability. Subglottal pressure, tracheal airflow, and electromyographic (EMG) data from two intrinsic laryngeal muscles were measured during 22-kHz and 50-kHz call production in awake, spontaneously behaving adult male rats. During ultrasound vocalization, subglottal pressure ranged between 0.8 and 1.9 kPa. Pressure differences between call types were not significant. The relation between fundamental frequency and subglottal pressure within call types was inconsistent. Experimental manipulations of subglottal pressure had only small effects on fundamental frequency. Tracheal airflow patterns were also inconsistently associated with frequency. Pressure and flow seem to play a small role in regulation of fundamental frequency. Muscle activity, however, is precisely regulated and very sensitive to alterations, presumably because of effects on resonance properties in the vocal tract. EMG activity of cricothyroid and thyroarytenoid muscle was tonic in calls with slow or no fundamental frequency modulations, like 22-kHz and flat 50-kHz calls. Both muscles showed brief high-amplitude, alternating bursts at rates up to 150 Hz during production of frequency-modulated 50-kHz calls. A differentiated and fine regulation of intrinsic laryngeal muscles is critical for normal ultrasound vocalization. Many features of the laryngeal muscle activation pattern during ultrasound vocalization in rats are shared with other mammals.

scholarly journals Formant-Estimated Vocal Tract Length and Extrinsic Laryngeal Muscle Activation During Modulation of Vocal Effort in Healthy Speakers

2020 ◽  
Vol 63 (5) ◽  
pp. 1395-1403
Author(s):  
Matti D. Groll ◽  
Victoria S. McKenna ◽  
Surbhi Hablani ◽  
Cara E. Stepp
Keyword(s):  
Muscle Activity ◽  
Surface Electromyography ◽  
Muscle Activation ◽  
Vocal Tract ◽  
General Linear ◽  
Laryngeal Muscle ◽  
Tract Length ◽  
Extrinsic Muscle ◽  
Vocal Effort ◽  
Muscle Groups

Purpose The goal of this study was to explore the relationships among vocal effort, extrinsic laryngeal muscle activity, and vocal tract length (VTL) within healthy speakers. We hypothesized that increased vocal effort would result in increased suprahyoid muscle activation and decreased VTL, as previously observed in individuals with vocal hyperfunction. Method Twenty-eight healthy speakers of American English produced vowel–consonant–vowel utterances under varying levels of vocal effort. VTL was estimated from the vowel formants. Three surface electromyography sensors measured the activation of the suprahyoid and infrahyoid muscle groups. A general linear model was used to investigate the effects of vocal effort level and surface electromyography on VTL. Two additional general linear models were used to investigate the effects of vocal effort on suprahyoid and infrahyoid muscle activities. Results Neither vocal effort nor extrinsic muscle activity showed significant effects on VTL; however, the degree of extrinsic muscle activity of both suprahyoid and infrahyoid muscle groups increased with increases in vocal effort. Conclusion Increasing vocal effort resulted in increased activation of both suprahyoid and infrahyoid musculature in healthy adults, with no change to VTL.

High‐density surface electromyography: A visualization method of laryngeal muscle activity

2019 ◽  
Vol 129 (10) ◽  
pp. 2347-2353 ◽  
Author(s):  
David J. Bracken ◽  
Gladys Ornelas ◽  
Todd P. Coleman ◽  
Philip A. Weissbrod
Keyword(s):  
Muscle Activity ◽  
Surface Electromyography ◽  
High Density ◽  
Visualization Method ◽  
Laryngeal Muscle ◽  
Density Surface

Intrinsic Laryngeal Muscle Activity in a Spastic Dysphonia Patient

1985 ◽  
Vol 50 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Thomas Shipp ◽  
Krzysztof Izdebski ◽  
Charles Reed ◽  
Philip Morrissey
Keyword(s):  
Muscle Activity ◽  
Emg Activity ◽  
Muscle Paralysis ◽  
Normal Morphology ◽  
Laryngeal Muscles ◽  
Laryngeal Muscle ◽  
Intrinsic Laryngeal Muscle ◽  
Posterior Cricoarytenoid ◽  
Recurrent Laryngeal Nerves ◽  
Intrinsic Laryngeal Muscles

EMG activity from four intrinsic laryngeal muscles (thyroarytenoid, posterior cricoarytenoid, interarytenoid, and cricothyroid) was obtained from one female spastic dysphonia patient while she performed a variety of speech and nonspeech tasks. These tasks were performed before and during a period of temporary unilateral laryngeal muscle paralysis. In the nonparalyzed condition, adductory muscle activity showed intermittent sudden increases that coincided with momentary voice arrests. These muscle patterns and accompanying voice interruptions were not present either when speech was produced in falsetto register or at anytime during the paralysis condition. The data suggest that individuals with this type of spastic dysphonia have normal morphology of recurrent laryngeal nerves and intrinsic laryngeal muscles, which means that the triggering mechanism(s) for spastic dysphonia symptoms must be located at some point neurologically upstream from the larynx.

scholarly journals The effects of oesophageal distension on diaphragm and laryngeal muscle activity in the anaesthetized cat

1994 ◽  
Vol 79 (4) ◽  
pp. 505-513 ◽  
Author(s):  
JF Jones ◽  
D McKeogh ◽  
P Nolan ◽  
RG O'Regan
Keyword(s):  
Muscle Activity ◽  
Laryngeal Muscle

Laryngeal Muscle Activity and Vocal Fold Adduction During Chest, Chestmix, Headmix, and Head Registers in Females

2012 ◽  
Vol 26 (2) ◽  
pp. 182-193 ◽  
Author(s):  
Karen Ann Kochis-Jennings ◽  
Eileen M. Finnegan ◽  
Henry T. Hoffman ◽  
Sanyukta Jaiswal
Keyword(s):  
Muscle Activity ◽  
Vocal Fold ◽  
Laryngeal Muscle

Laryngeal Muscle Activity in Giggle: A Damped Oscillation Model

2008 ◽  
Vol 22 (6) ◽  
pp. 644-648 ◽  
Author(s):  
Ingo R. Titze ◽  
Eileen M. Finnegan ◽  
Anne-Maria Laukkanen ◽  
Megan Fuja ◽  
Henry Hoffman
Keyword(s):  
Muscle Activity ◽  
Laryngeal Muscle ◽  
Oscillation Model ◽  
Damped Oscillation
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