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
Information about cause and effect of flexor carpi radialis pain: Flexor Carpi Radialis Muscle: Wrist and Hand Pain