Flexor Carpi Radialis Anatomy

Flexor Carpi Radialis Muscle

Origin:  Medial epicondyle of the humerus via the common flexor tendon
Insertion:  Base of the second and, occasionally, the third metacarpal
Actions: Flexion of the wrist
Innervation: Median nerve (C6 C7)
Blood Supply: Muscular branches from the radial artery

Primary Actions of the Flexor Carpi Radialis

1. Flexion of the wrist

  Agonists:

  • Palmaris Longus
  • Flexor Carpi Ulnaris

  Antagonists:

  • Extensor Carpi Radialis Longus
  • Extensor Carpi Radialis Brevis
  • Extensor Carpi Ulnaris

Flexor digitorum superficialis, flexor digitorum profundus, and flexor pollicis longus assist with flexion of the wrist.

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Secondary Actions of the Flexor Carpi Radialis

1. Assists with radial deviation of the wrist

  Agonists:

  • Extensor Carpi Radialis longus
  • Extensor Carpi Radialis Brevis

  Antagonists:

  • Flexor Carpi Ulnaris
  • Extensor Carpi Ulnaris

2. Assists with flexion of the forearm at the elbow

  Agonists:

  • Biceps Brachii
  • Brachioradialis
  • Brachialis

Antagonists:

  • Triceps Brachii
  • Anconeus