NDLI: Effect of Aging on Tongue Protrusion Forces in Rats

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Effect of Aging on Tongue Protrusion Forces in Rats

Content Provider	PubMed Central
Author	Nagai, Hiromi Russell, John A. Jackson, Michelle A. Connor, Nadine P.
Abstract	The purpose of this study was to ascertain the effect of aging on muscle contractile properties associated with tongue protrusion in a rat model. Fischer 344/Brown Norway hybrid rats, ten young (9 months old) and ten old (32 months old), were used to measure protrusive contractile properties. Results showed a significant reduction in tetanic forces in the old animals. The following measures of muscle contraction were not different between age groups: mean twitch contraction force, twitch contraction time, twitch contraction half-decay time, and a calculated measure of fatigability. In conclusion, aging influenced protrusive tongue muscle contractions in a rat model such that tetanic forces were reduced. The reduction of tetanus force may parallel findings in human subjects relative to isometric tongue force generation and may be associated with age-related disorders of swallowing.
Related Links	http://dx.doi.org/10.1007/s00455-007-9103-6
Ending Page	121
Page Count	6
Starting Page	116
File Format	PDF
ISSN	0179051X
e-ISSN	14320460
Journal	Dysphagia
Issue Number	2
Volume Number	23
Language	English
Publisher Date	2008-06-01
Access Restriction	Open
Subject Keyword	Speech and Hearing Gastroenterology Otorhinolaryngology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Otorhinolaryngology Gastroenterology Speech and Hearing

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