The extensor carpi radialis longus is a muscle that helps move the hand. It also facilitates movement at the wrist. It is involved in extending and abducting the hand at the wrist joint. The muscle also plays a role in flexion of the elbow. It is part of a muscle group with the extensor carpi radialis brevis, which is located adjacent to it. The extensor carpi radialis longus is longer and thinner than its brevis counterpart.
The muscle originates along the lateral supracondylar ridge of the humerus. It inserts at the posterior base of the second metacarpal. Within the hand, this is the bone connected to the phalanges of the index finger. The radial nerve controls the muscle’s movement. The radial artery and radial vein support the circulation of blood to this muscle group. One of the most common injuries associated with the extensor carpi radialis longus is known as lateral epicondylitis, or ‘tennis elbow.’ This painful condition occurs when tendons in the elbow have been overworked. This is often due to repetitive movements of the forearm or hand.
Muscles that Extend the Wrist
- Extensor Carpi Radialis Longus.
- Extensor Carpi Radialis Brevis.
- Extensor Carpi Ulnaris.
Blood Supply
- Radial Artery
Active Movements
- Elbow flexion/extension
- Supination/pronation
- Wrist flexion/extension
- Radial/ulnar deviation
Passive Movements
- Elbow flexion/extension
- Supination/pronation
- Wrist flexion/pronation
- Radial/ulnar deviation
Resisted Movements
- Wrist extension
- Wrist abduction (radial deviation)
- Wrist extension together with abduction
- Grip test
Treatment
- Control of pain
- Soft tissue therapy
- Manual therapy – elbow and wrist
- Stretching
- Muscle strengthening
The extensor carpi radialis longus is a very important muscle to take care of. We use our arms and hands everyday , we need to make sure we will be able to use them in 10 years time. Take care and come see us at Centre 4 health
