The architecture and contraction time of intrinsic foot muscles

Tosovic, Danijel, Ghebremedhin, Estifanos, Glen, Christopher, Gorelick, Mark and Brown, J. Mark (2012) The architecture and contraction time of intrinsic foot muscles. Journal of Electromyography and Kinesiology, 22 6: 930-938.


Author Tosovic, Danijel
Ghebremedhin, Estifanos
Glen, Christopher
Gorelick, Mark
Brown, J. Mark
Title The architecture and contraction time of intrinsic foot muscles
Journal name Journal of Electromyography and Kinesiology  (ERA 2012 Listed)    (ERA 2010 Rank B)   Check publisher's open access policy
Publication date 2012-06
Sub-type Article
DOI 10.1016/j.jelekin.2012.05.002
Volume number 22
Issue number 6
ISSN 1050-6411; 1873-5711
Start page 930
End page 938
Total pages 9
Place of publication Oxford, United Kingdom
Publisher Elsevier
Collection year 2013
Language eng
Formatted abstract Although critical for effective human locomotion and posture, little data exists regarding the segmentation, architecture and contraction time of the human intrinsic foot muscles. To address this issue, the Abductor Hallucis (AH), Abductor Digiti Minimi (ADM), Flexor Digitorum Brevis (FDB) and Extensor Digitorum Brevis (EDB) were investigated utilizing a cadaveric dissection and a non-invasive whole muscle mechanomyographic (wMMG) technique. The segmental structure and architecture of formaldehyde-fixed foot specimens were determined in nine cadavers aged 60–80 years. The wMMG technique was used to determine the contraction time (Tc) of individual muscle segments, within each intrinsic foot muscle, in 12 volunteers of both genders aged between 19 and 24 years.

While the pattern of segmentation and segmental –architecture (e.g. fibre length) and –Tc of individual muscle segments within the same muscle were similar, they varied between muscles. Also, the average whole muscle Tc of FDB was significantly (p < 0.05) shorter (faster) (Tc = 58 ms) than in all other foot muscles investigated (ADM Tc = 72 ms, EDB Tc = 72 ms and ABH Tc = 69 ms). The results suggest that the architecture and contraction time of the FDB reflect its unique direct contribution, through toe flexion, to postural stability and the rapid development of ground reaction forces during forceful activities such as running and jumping.
Keyword Intrinsic foot muscles
Mechanomyography
Muscle architecture
Muscle segmentation
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Available online: 27 June 2012.

Document type: Journal Article
Sub-type: Article
Collections: Official 2013 Collection
School of Biomedical Sciences Publications
 
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Created: Thu, 31 May 2012, 07:56:18 EST by Dr Estifanos Ghebremedhin on behalf of School of Biomedical Sciences