Task-specific recruitment of motor units for vibration damping

James M Wakeling, Anna-Maria Liphardt

Publikation: Beitrag in FachzeitschriftZeitschriftenaufsätzeForschungBegutachtung

Abstract

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.

OriginalspracheEnglisch
ZeitschriftJournal of biomechanics
Jahrgang39
Ausgabenummer7
Seiten (von - bis)1342-6
Seitenumfang5
ISSN0021-9290
DOIs
PublikationsstatusVeröffentlicht - 01.01.2006

Fingerprint

Untersuchen Sie die Forschungsthemen von „Task-specific recruitment of motor units for vibration damping“. Zusammen bilden sie einen einzigartigen Fingerprint.

Zitation