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Protrusive tongue strength in people with severely weak tongues

International journal of speech-language pathology | 23 Jan 2013

RM Furlan, AR Motta, AF Valentim, MF Barroso, CG Costa and EB Casas
Abstract
The purpose of the study was to quantify tongue protrusion force and compare its characteristics between participants with severely weak tongues and those with normal lingual strength. The sample consisted of 11 participants with severe lingual strength deficits and 11 age- and sex-matched participants with normal lingual strength. Tongue force was evaluated quantitatively using the Forling instrument, and the average force, maximum force, average force application rate, and area under the graphic curve were analysed. These parameters were compared between the groups. In the participants with severely weak tongues, the average and the maximum forces in N (Newton) were 2.03 ± 1.17 and 3.56 ± 1.77, respectively. The average force application rate in N/s (Newton per second) was 1.25 and the area under the graphic curve in Ns (Newton times second) was 18.6. The values of the participants with normal lingual strength were, respectively, 13.27 ± 6.15 N, 18.91 ± 7.95 N, 10.46 N/s, and 108.08 Ns. All parameters analysed differed significantly between the groups. The data collected could aid speech-language pathologists in diagnosing problems related to tongue force.
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Concepts
Tensile stress, Mass, Lingual nerve, Newton, Classical mechanics, Tongue, Force
MeSH headings
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