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Flexor Digitorum Superficialis: Origin, Insertion, Nerve Supply & Action

Flexor Digitorum Superficialis: The flexor digitorum superficialis muscle is the only muscle of the intermediate compartment. It can sometimes be classed as a superficial layer muscle, but in most cadavers, it lies between the deep and superficial layers of the muscle.

The muscle is a good anatomical landmark in the forearm – the median nerve and ulnar artery pass between its two heads and then travel it posteriorly.

Flexor-Digitorum-Superficialis

Origin: It has two heads – one originates from the medial epicondyle of the humerus, the other from the radius. The muscle splits into four tendons at the wrist, which travels through the carpal tunnel.

Insertion: Attaches to the middle phalanges of the four fingers.

Function: Flexes the metacarpophalangeal joints and proximal interphalangeal joints at the 4 fingers, and flexes at the wrist.

Nerve supply: Median nerve.

Upper Extremity Muscle Atlas

  • Abductor Pollicis Longus
  • Abductor Digiti Minimi
  • Abductor Pollicis Brevis
  • Adductor Pollicis
  • Anconeus
  • Biceps Brachii
  • Brachioradialis
  • Brachialis
  • Coracobrachialis
  • Deltoid
  • Extensor Carpi Radialis Longus
  • Extensor Carpi Radialis Brevis
  • Extensor Carpi Ulnaris
  • Extensor Digitorum
  • Extensor Digiti Minimi
  • Extensor Indicis
  • Extensor Pollicis Longus
  • Extensor Pollicis Brevis
  • Flexor Carpi Radialis
  • Flexor Carpi Ulnaris
  • Flexor Digitorum Profundus
  • Flexor Digitorum Superficialis
  • Flexor Digiti Minimi Brevis
  • Flexor Pollicis Brevis
  • Flexor Pollicis Longus
  • Infraspinatus
  • Interosseous Muscles, Dorsal
  • Interosseous Muscles, Palmar
  • Levator Scapulae
  • Latissimus Dorsi
  • Opponens Digiti Minimi
  • Opponens Pollicis
  • Pectoralis Major
  • Pectoralis Minor
  • Palmaris Longus
  • Pronator Quadratus
  • Pronator Teres
  • Rhomboid Major and Minor
  • Subscapularis
  • Supinator
  • Serratus Anterior
  • Supraspinatus
  • Trapezius
  • Triceps Brachii
  • Teres Major
  • Teres Minor
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