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Dysphagia
Published in: Dysphagia 2/2008

01-06-2008 | Original Article

Effect of Aging on Tongue Protrusion Forces in Rats

Authors: Hiromi Nagai, John A. Russell, Michelle A. Jackson, Nadine P. Connor

Published in: Dysphagia | Issue 2/2008

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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.
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Metadata
Title
Effect of Aging on Tongue Protrusion Forces in Rats
Authors
Hiromi Nagai
John A. Russell
Michelle A. Jackson
Nadine P. Connor
Publication date
01-06-2008
Publisher
Springer-Verlag
Published in
Dysphagia / Issue 2/2008
Print ISSN: 0179-051X
Electronic ISSN: 1432-0460
DOI
https://doi.org/10.1007/s00455-007-9103-6

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