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Projections of two types of flexor tendon sheaths. Note that in the hand upon the right side there is a continuation between the little finger and the ulnar bursa, and also between the thumb and radial bursa. Note also the connecting sheaths between. In the hand upon the left side the sheaths are separated not alone from their respective fingers but from each other. The type noted upon the right side is the one usually found.

Tendon Sheaths of Wrist and Hand

Projections of two types of flexor tendon sheaths. Note that in the hand upon the right side there is…