Effect of tongue exercise on protrusive force and muscle fiber area in aging rats.

Journal of Speech, Language, and Hearing Research : JSLHR
Nadine P ConnorKeith Kluender

Abstract

Age-related changes in tongue function may contribute to dysphagia in elderly people. The authors' purpose was to investigate whether aged rats that have undergone tongue exercise would manifest increased protrusive tongue forces and increased genioglossus (GG) muscle fiber cross-sectional areas. Forty-eight young adult, middle-aged, and old Fischer 344/Brown Norway rats received 8 weeks of tongue exercise. Protrusive tongue forces were measured before and after exercise. GG muscle fiber cross-sectional area was measured in exercised rats and was compared with cross-sectional areas in a no-exercise control group. A significant increase in maximum tongue force was found following exercise in all age groups. In addition, a trend for increased GG muscle fiber cross-sectional area and a significant increase in variability of GG muscle fiber cross-sectional area was identified postexercise. The findings of this study have implications for treatment of elderly persons with dysphagia using tongue exercise programs. Specifically, increases in tongue force that occur following 8 weeks of progressive resistance tongue exercise may be accompanied by alterations in tongue muscle fiber morphology. These changes may provide greater strength ...Continue Reading

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Citations

Feb 28, 2009·Experimental Brain Research·Michelle Renee Ciucci, Nadine P Connor
May 11, 2011·Brain Imaging and Behavior·Catherine L GallagherW Douglas Brown
Jan 11, 2012·Journal of Speech, Language, and Hearing Research : JSLHR·Mary BehanNadine P Connor
Mar 22, 2014·Pflügers Archiv : European journal of physiology·Dae Yun SeoJin Han
Mar 8, 2012·Behavioural Brain Research·Sheila M FlemingMichelle R Ciucci
Oct 20, 2015·Behavioural Brain Research·Allison J SchaserNadine P Connor
Nov 22, 2012·Muscle & Nerve·Nadine P ConnorDavid L Zealear
Dec 5, 2014·Radiation Oncology·John A Russell, Nadine P Connor
Apr 5, 2011·Behavioural Brain Research·Michelle R CiucciNadine P Connor
Jun 5, 2016·The Laryngoscope·Brittany N Krekeler, Nadine P Connor
Feb 10, 2017·Muscle & Nerve·Miranda J Cullins, Nadine P Connor
Dec 16, 2017·The Laryngoscope·Miranda J CullinsNadine P Connor
May 26, 2018·Muscle & Nerve·Heidi KletzienNadine P Connor
Jun 20, 2015·Journal of Speech, Language, and Hearing Research : JSLHR·Emily K Plowman
Jan 11, 2020·Frontiers in Neuroscience·Miranda J CullinsNadine P Connor
Feb 19, 2021·Journal of Applied Physiology·Miranda J CullinsNadine P Connor
Oct 6, 2020·Experimental Gerontology·Heidi KletzienNadine P Connor
Oct 20, 2019·Journal of Voice : Official Journal of the Voice Foundation·Aaron M Johnson, Mary J Sandage
Jul 10, 2021·Journal of Voice : Official Journal of the Voice Foundation·Aaron M Johnson, Mary J Sandage
Sep 16, 2021·Journal of Speech, Language, and Hearing Research : JSLHR·Corinne A Jones, Christina M Colletti
Nov 9, 2021·Frontiers in Physiology·Tiffany J GlassNadine P Connor

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