Flexor pollicis longus muscle

Flexor pollicis longus (FPL) muscle is one of the two muscles that make up the third layer of the anterior compartment of the forearm along with the flexor digitorum profundus muscle. It is a deep muscle under the abductor pollicis brevis muscle. It passes through the carpal tunnel. It is one of the extrinsic muscles of the hand.

Summary

• origin: mid-anterior surface of the radial shaft and adjacent interosseous membrane
  • frequently the flexor pollicis longus muscle arises from the lower part and slip of coronoid process of ulna by a rounded bundle of muscular fibers and even medial epicondyle of humerus
• insertion: volar surface of the distal 1 phalanx (thumb)
• innervation: anterior interosseous nerve
• action: flexion of 1 interphalangeal joint

Variant anatomy

• Linburg-Comstock anomaly

Siehe auch:

• Fingermuskulatur
• Handgelenksmuskulatur
• Musculus flexor pollicis brevis
• flexor pollicis longus tendon rupture
• lange Beugesehne

und weiter:

• Mannerfelt-Syndrom
• Ruptur Sehne Musculus flexor pollicis longus Musculus flexor digitorum longus über Osteophyt vom Scaphoid