主要作用關節第 2–5 近端指間關節 Proximal interphalangeal joints of digits 2–5第 2–5 掌指關節 Metacarpophalangeal joints of digits 2–5腕關節綜合體 Wrist joint complex
跨越關節腕關節綜合體 Wrist joint complex第 2–5 掌指關節 Metacarpophalangeal joints of digits 2–5第 2–5 近端指間關節 Proximal interphalangeal joints of digits 2–5
起點 Origin肱骨內上髁(經共同屈肌腱) Medial epicondyle via common flexor tendon肘關節尺側副韌帶及尺骨冠突 Ulnar collateral ligament and coronoid process橈骨前緣上半部 Superior half of anterior border of radius