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This study examines the role of the direction of a fall on neuromuscular response. Electromyography sensors were positioned on the erector spinae of twenty subjects. Falls, simulating slips, occurred in the anterior, posterior, and medial-lateral directions. The average activation curves for the four different fall directions displayed different characteristics. Observations were supported by principal component analysis (PCA). PCA coefficients related all fall directions to a single reflex-like response. Analysis of variance on the coefficients demonstrated that anterior falls had a…mehr

Produktbeschreibung
This study examines the role of the direction of a
fall on neuromuscular response. Electromyography
sensors were positioned on the erector spinae of
twenty subjects. Falls, simulating slips, occurred
in the anterior, posterior, and medial-lateral
directions. The average activation curves for the
four different fall directions displayed different
characteristics. Observations were supported by
principal component analysis (PCA). PCA coefficients
related all fall directions to a single reflex-like
response. Analysis of variance on the coefficients
demonstrated that anterior falls had a significantly
(p0.05) stronger reflex-like response than posterior
falls. There was also a significant (p0.05)
difference for the interaction between side of the
erector spinae and fall direction for the
medial-lateral fall directions. Here the
contra-lateral muscle had a stronger reflex-like
response than the ipsi-lateral muscle. Possible
reasons for the observations could be to increase
time available for active responses or decrease the
energy transferred if the head impacted the ground.
Autorenporträt
Timothy Craig is working towards a doctorate of philosophy in the
field of mechanical engineering with a focus on biomechanics at
the University of Kansas. Craig has worked on research that
ranges from falls in the elderly to occupational vibration
exposure in young adults.