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Flexor carpi radialis muscle

Synonym: radial hand flexor
German: Musculus flexor carpi radialis

1 Definition

The flexor carpi radialis muscle belongs to the superficial layer of the forearm flexors.

2 Devolution

2.1 Origin

The flexor carpi radialis muscle has its origin at the medial epicondyle of the humerus - between the palmaris longus muscle and the pronator teres muscle - as well as at the antebrachial fascia.

2.2 Insertion

The muscle passes diagonally across the ulna into distal direction and ends in a long tendon which draws to the lateral wrist and forms a small bony hollow in the trapezium bone. Finally, it inserts at the 2nd metacarpal bone and - with a smaller portion of the tendon - at the 3rd metacarpal bone.

In the lower third of the forearm, the radial artery passes between the tendon of the flexor carpi radialis muscle and the tendon of the brachioradialis muscle.

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3 Innervation

The innervation of the flexor carpi radialis muscle is provided by the medianus nerve, with fibers from the C5, C6 and C7 segments.

4 Function

The flexor carpi radialis muscle effects a flexion in the wrist (palmar flexion) as well as a radial abduction. It supports pronation, when the elbow is being extended.

Specialties: Anatomy

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