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Biomechanical Overview, Tennis Elbow, Pitcher's Elbow, Treatment Strategies
Biomechanical Overview
The elbow is a fairly straightforward joint in that it has two directions of movement, bending and straightening. However the forearm has two bones and a spiralic arrangement of muscles. With the added component of forearm movement, many more movement combinations can be added to hand, wrist and elbow activity. Imagine for a moment that you find a piece of paper on the floor. You pick it up reaching out, straightening your elbow with the palm down to grasp it.
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You then turn your palm up as you bend your elbow to view the paper. In various sports a player combines bending/straightening movements of the elbow with either forearm turning or flicking the hand/wrist up/down. These motions activate the wrist/finger flexors or wrist/finger extensors as well as the pronators (muscles which turn the palm down, see clip 1) and supinators (muscles which turn the palm up).
With Pitcher's Elbow or Medial Epicondylitis (See ill. 2 for location of muscle attachment), the ball is thrown with a downward flick of the wrist and with a supination motion of the forearm.
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