What causes the carrying angle of the elbow joint? What functional purpose does the carrying angle serve?
What will be an ideal response?
ANS:
The carrying angle is created by the obliquity of the humeral condyles and elbow joint axis. Although the elbow is a hinge joint, the axis is tilted slightly (down on the medial side). Thus, as the elbow flexes, the forearm moves medially on the humerus (like folding a piece of paper on a crooked fold). The effect is that elbow flexion brings the hand closer to the mouth (a very functional movement) without any glenohumeral rotation.
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