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Task-specific recruitment of motor units for vibration damping

Wakeling, James and Liphardt, Anna-Maria (2006) Task-specific recruitment of motor units for vibration damping. Journal of Biomechanics, 39, pp. 1342-1346.

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Vibrations occur within the soft tissues of the lower extremities due to the heel-strike impact during walking. Increases in muscle activity in the lower extremities result in increased damping to reduce this vibration. The myoelectric intensity spectra were compared using principal component analysis from the tibialis anterior and lateral gastrocnemius of 40 subjects walking with different shoe conditions. The soft insert condition resulted in a significant, simultaneous increase in muscle activity with a shift to higher myoelectric frequencies in the period 0-60 ms after heel-strike which is the period when the greater vibration damping occurred. These increases in myoelectric frequency match the spectral patterns which indicate increases in recruitment of faster motor units. It is concluded that fast motor units are recruited during the task of damping the soft-tissue resonance that occurs following heel-strike.

Item URL in elib:https://elib.dlr.de/46397/
Document Type:Article
Title:Task-specific recruitment of motor units for vibration damping
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wakeling, JamesUniversity of LondonUNSPECIFIED
Journal or Publication Title:Journal of Biomechanics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1342-1346
Keywords:Vibration, Motor control, Walking, Muscle Recruintment, Damping
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignment
DLR - Research area:Space
DLR - Program:W - no assignment
DLR - Research theme (Project):W - no assignment (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerospace Medicine > Space Physiology
Deposited By: Zange, Dr.rer.nat. Jochen
Deposited On:19 Dec 2006
Last Modified:27 Apr 2009 13:22

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