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Flexor Digitorum Profundus
The flexor digitorum profundus is a muscle in the forearm that flexes the fingers. It is considered to be an extrinsic muscle because its action is at a different location than the main body of the muscle.
Anatomy of the Flexor Digitorum Profundus
The flexor digitorum profundus muscle is antagonist to the Extensor digitorum muscle. It is supplied by the ulnar artery and innervated by the muscular branches of ulnar nerve.
Flexor digitorum profundus, along with flexor digitorum superficialis have long tendons that run down the arm and through the carpal tunnel and attach to the palmar side of the phalanges of the fingers. This muscle originates from the anterior side of the ulna.
Flexor digitorum profundus lies deep to superficialis, but it attaches more distally. To get around this problem profundus tendons go through the tendons of superficialis, and end up attaching to the distal phalanx.
Functions of the Flexor Digitorum Profundus
The flexor carpi ulnaris muscle assists in flexing the hand and interphalangeal joints.













