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Origin: Tendon of Flexor carpi ulnaris and pisiform bone Insertion: By two slips:  one into base of proximal phalanx of little finger, ulnar side; the second, into the ulnar border of the extensor expansion. Innervation: Ulnar, C(7), 8, T1 Action: Abducts, assists in opposition, and may assist in flexion of the MCP of the little finger, may assist in extension of IP joints.

Dorsal Instrinsic | Volar Instrinsic Superficial | Volar Intrinsic Deep | Extrinsic Muscles | Muscle Arrangement | Help | Hand Kinesiology

Lorie Richards and Janice Loudon, University of Kansas Medical Center, School of Allied Health,
Occupational and Physical Therapy Education, October 1997