PCA Demonstrates Trunk Muscle Pattern Variation with Fall Direction
Timothy Craig
Broschiertes Buch

PCA Demonstrates Trunk Muscle Pattern Variation with Fall Direction

Application of Principal Component Analysis to a Biomechanical System

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This study examines the role of the direction of afall on neuromuscular response. Electromyographysensors were positioned on the erector spinae oftwenty subjects. Falls, simulating slips, occurredin the anterior, posterior, and medial-lateraldirections. The average activation curves for thefour different fall directions displayed differentcharacteristics. Observations were supported byprincipal component analysis (PCA). PCA coefficientsrelated all fall directions to a single reflex-likeresponse. Analysis of variance on the coefficientsdemonstrated that anterior falls had a significantly(p0.05)...