Some Physiologic Correlates of Vocal-Fry Phonation

1971 ◽  
Vol 14 (4) ◽  
pp. 769-775 ◽  
Author(s):  
Robert E. McGlone ◽  
Thomas Shipp
Keyword(s):  
Young Adult ◽  
Muscle Activity ◽  
Low Frequency ◽  
Air Pressure ◽  
Electromyographic Activity ◽  
Adult Males ◽  
Young Adult Males ◽  
Posterior Cricoarytenoid Muscle ◽  
Posterior Cricoarytenoid

Subglottal air pressure, airflow, and electromyographic activity of four intrinsic larygeal muscles were recorded during sustained phonation in the vocal-fry and low-frequency modal registers. Nine young adult males were subjects. In modal phonation there was greater airflow, greater cricothyroid and interarytenoid muscle activity, and decreased thyroarytenoid activity than in vocal fry. No differences were found between registers for subglottal air pressure or posterior cricoarytenoid muscle activity.

Laryngeal Dynamics Associated with Voice Frequency Change

1971 ◽  
Vol 14 (4) ◽  
pp. 761-768 ◽  
Author(s):  
Thomas Shipp ◽  
Robert E. McGlone
Keyword(s):  
Muscle Activity ◽  
Air Flow ◽  
Frequency Change ◽  
Electromyographic Activity ◽  
Adult Males ◽  
Cricothyroid Muscle ◽  
Systematic Pattern ◽  
Subglottal Pressure ◽  
Posterior Cricoarytenoid ◽  
Highly Correlated

Simultaneous measures of laryngeal muscle electromyographic activity, subglottal pressure, and air flow were obtained from 14 adult males as they sustained phonation at the 10, 30, 50, 70, and 90% frequency points of their rnodal-to-falsetto range. Frequency was changed throughout the vocal range principally by thyroarytenoid and cricothyroid muscle activity. Further, activity from these two muscles was highly correlated with measures of subglottal pressure. Activity from the posterior cricoarytenoid and interarytenoid muscles and air flow measures showed no systematic pattern related to voice frequency change.

scholarly journals Determining the Optimal Workrate for Cycle Ergometer Verification Phase Testing in Males with Obesity

Sports ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 30
Author(s):  
Jenny M. Mahoney ◽  
Brett R. Baughman ◽  
Ailish C. Sheard ◽  
Brandon J. Sawyer
Keyword(s):  
Body Mass Index ◽  
Young Adult ◽  
Body Mass ◽  
Critical Power ◽  
Cycle Ergometer ◽  
Adult Males ◽  
Ramp Test ◽  
Young Adult Males ◽  
Main Effect ◽  
Vo2max Test

The aim of the present study was to assess the validity of verification phase (VP) testing and a 3 min all-out test to determine critical power (CP) in males with obesity. Nine young adult males with a body mass index (BMI) ≥ 30 kg·m−2 completed a cycle ergometer ramp-style VO2max test, four randomized VP tests at 80, 90, 100, and 105% of maximum wattage attained during the ramp test, and a 3 min all-out test. There was a significant main effect for VO2max across all five tests (p = 0.049). Individually, 8 of 9 participants attained a higher VO2max (L/min) during a VP test compared to the ramp test. A trend (p = 0.06) was observed for VO2max during the 90% VP test (3.61 ± 0.54 L/min) when compared to the ramp test (3.37 ± 0.39 L/min). A significantly higher VO2max (p = 0.016) was found in the VP tests that occurred below 130% of CP wattage (N = 15, VO2max = 3.76 ± 0.52 L/min) compared to those that were above (N = 21, VO2max = 3.36 ± 0.41 L/min). Our findings suggest submaximal VP tests at 90% may elicit the highest VO2max in males with obesity and there may be merit in using % of CP wattage to determine optimal VP intensity.

Respiratory Activity of the Rat Posterior Cricoarytenoid Muscle

1997 ◽  
Vol 106 (11) ◽  
pp. 897-901 ◽  
Author(s):  
Robert G. Berkowitz ◽  
John Chalmers ◽  
Qi-Jian Sun ◽  
Paul M. Pilowsky
Keyword(s):  
Phrenic Nerve ◽  
Muscle Activity ◽  
Electrophysiological Study ◽  
Emg Activity ◽  
Diaphragmatic Muscle ◽  
Posterior Cricoarytenoid Muscle ◽  
Inspiratory Activity ◽  
Intramuscular Nerve ◽  
Posterior Cricoarytenoid ◽  
Nerve Discharge

An anatomic and electrophysiological study of the rat posterior cricoarytenoid (PCA) muscle is described. The intramuscular nerve distribution of the PCA branch of the recurrent laryngeal nerve was demonstrated by a modified Sihler's stain. The nerve to the PCA was found to terminate in superior and inferior branches with a distribution that appeared to be confined to the PCA muscle. Electromyography (EMG) recordings of PCA muscle activity in anesthetized rats were obtained under stereotaxic control together with measurement of phrenic nerve discharge. A total of 151 recordings were made in 7 PCA muscles from 4 rats. Phasic inspiratory activity with a waveform similar to that of phrenic nerve discharge was found in 134 recordings, while a biphasic pattern with both inspiratory and post-inspiratory peaks was recorded from random sites within the PCA muscle on 17 occasions. The PCA EMG activity commenced 24.6 ± 2.2 milliseconds (p < .0001) before phrenic nerve discharge. The results are in accord with findings of earlier studies that show that PCA muscle activity commences prior to inspiratory airflow and diaphragmatic muscle activity. The data suggest that PCA and diaphragm motoneurons share common or similar medullary pre-motoneurons. The earlier onset of PCA muscle activity may indicate a role for medullary pre-inspiratory neurons in initiating PCA activity.

Sign in / Sign up

Export Citation Format

Share Document