[TA] three synovial tendon sheaths that allow movement of tendons across the anterior aspect of the wrist, deep to or within the flexor retinaculum; they are the: (1) tendinous sheath of flexor pollicis longus (muscle) [TA] (vagina tendinis musculi flexoris pollicis longi [TA]); (2) tendinous sheath of flexor carpi radialis (muscle) [TA] (vagina tendinis musculi flexoris carpi radialis [TA]); and (3) common flexor sheath [TA] (vagina communis tendinum musculorum flexorum [TA]). SYN: vaginae tendinum carpales palmares [TA].
