Multivariate Analysis of Biomechanical Profiles for the Coracobrachialis and Biceps Brachii (Caput Breve) Muscles in Humans

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Abstract
A multivariate analysis of various biomechanical parameters for the muscles coracobrachialis and biceps brachii (caput breve) was conducted for two groups of human subjects while they practiced a skill acquisition task conducted over a period of time and at different subject-to-target distances. Practice at different distances had no effect on either muscle. Comparisons of pre- and post-test data indicated that the biomechanical parameters were altered as a function of practice or increased time spent at the task. A specific statistical comparison of these two morphologically similar muscles indicated significant differences in their response profiles. Lastly, practice had a differential effect on the activity of the two muscles.