LOGIN
 
Share Page:
Back

Volume 25 , Issue 3
Summer 2011

Pages 250260


Control of Jaw-Clenching Forces in Dentate Subjects

Marco Testa, PT/Mara Rolando, MEng/Silvestro Roatta, PhD


PMID: 21837292

Aims: To characterize the control of jaw-clenching forces by means of a simple force-matching exercise. Methods: Seventeen healthy subjects, provided with visual feedback of the exerted force, carried out a unilateral force-matching exercise requiring developing and maintaining for 7 seconds a jaw-clenching force at 10%, 30%, 50%, and 70% of the maximum voluntary contraction. The task was repeated three times in each of two sessions. Motor performance was assessed, for both left and right sides, by different indices quantifying mean distance (MD), offset error (OE), and standard deviation (SD). Their dependence on force intensity, side, and time was assessed by ANOVA. Results: All error indices increased with the intensity of contraction in absolute terms. After normalization with respect to force level, the average performance in the second session was characterized by MD of 8.1% 2.6, OE 4.8% 2.9, and SD 12.7% 6.7 (mean standard deviation). Assessment of performance exhibited good reliability for all indices (intraclass correlation coefficient ranging from 74% to 88%). The motor performance improved with repetition (P < .01), varied considerably between subjects, was not correlated with gender or age (P > .05) but was highly correlated between left and right side (P < .01). Conclusion: The adopted approach is adequate to provide for an objective assessment of individual force control, although the presence of a learning phase must be taken into account. J Orofac Pain 2011;25:250260

Key words: accuracy, force transducer, masseter muscle, motor control, precision


Full Text PDF File | Order Article

 

 
Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.

 

© 2017 Quintessence Publishing Co, Inc

JOFPH Home
Current Issue
Ahead of Print
Archive
Author Guidelines
About
Accepted Manuscripts
Submission Form
Submit
Reprints
Permission
Advertising
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us
Help