Extensor carpi radialis longus: Difference between revisions
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'''Original Editor '''- | '''Original Editor '''- Wanda van Niekerk | ||
'''Top Contributors''' - {{Special:Contributors/{{FULLPAGENAME}}}} | '''Top Contributors''' - {{Special:Contributors/{{FULLPAGENAME}}}} | ||
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== Description == | == Description == | ||
Extensor carpi radialis longus lies on the lateral side of the posterior compartment of the forearm, being partly covered by brachioradialis. Approximately in the middle of the forearm, the muscle forms a flattened tendon which runs distally over the lateral surface of the radius. In the lower third of the forearm, the tendon, together with that of extensor carpi radialis brevis, is crossed by the tendons of abductor pollicis longus and extensor pollicis brevis. The tendons of extensor carpi radialis longus and brevis pass deep to the extensor retinaculum in a common synovial sheath. Together they groove the posterior surface of the styloid process of the radius. | |||
=== Origin === | === Origin === | ||
Extensor carpi radialis longus arises from the anterior part of the lower third of the lateral supracondylar ridge of the humerus and adjacent intermuscular septum. | Extensor carpi radialis longus arises from the anterior part of the lower third of the lateral supracondylar ridge of the humerus and adjacent intermuscular septum. Occasionally, there may be an attachment to the lateral epicondyle by the common extensor tendon. | ||
=== Insertion === | === Insertion === | ||
The tendon of the extensor carpi radialis longus attaches to the posterior surface of the base of the second metacarpal. | |||
=== Nerve === | === Nerve === | ||
Extensor carpi radialis longus is supplied by the radial nerve (root value C6 and 7) from the posterior cord of the brachial plexus, which enters the muscle above the elbow. The skin over the muscle is supplied by roots C5 and C6 | Extensor carpi radialis longus is supplied by the radial nerve (root value C6 and 7) from the posterior cord of the brachial plexus, which enters the muscle above the elbow. The skin over the muscle is supplied by roots C5 and C6. | ||
=== Artery === | === Artery === | ||
Radial artery | |||
== Function == | == Function == | ||
Revision as of 17:37, 25 June 2018
Original Editor - Wanda van Niekerk
Top Contributors - Wanda van Niekerk, Nina Myburg, Kim Jackson, Rachael Lowe, Amanda Ager and Aya Alhindi
Description[edit | edit source]
Extensor carpi radialis longus lies on the lateral side of the posterior compartment of the forearm, being partly covered by brachioradialis. Approximately in the middle of the forearm, the muscle forms a flattened tendon which runs distally over the lateral surface of the radius. In the lower third of the forearm, the tendon, together with that of extensor carpi radialis brevis, is crossed by the tendons of abductor pollicis longus and extensor pollicis brevis. The tendons of extensor carpi radialis longus and brevis pass deep to the extensor retinaculum in a common synovial sheath. Together they groove the posterior surface of the styloid process of the radius.
Origin[edit | edit source]
Extensor carpi radialis longus arises from the anterior part of the lower third of the lateral supracondylar ridge of the humerus and adjacent intermuscular septum. Occasionally, there may be an attachment to the lateral epicondyle by the common extensor tendon.
Insertion[edit | edit source]
The tendon of the extensor carpi radialis longus attaches to the posterior surface of the base of the second metacarpal.
Nerve[edit | edit source]
Extensor carpi radialis longus is supplied by the radial nerve (root value C6 and 7) from the posterior cord of the brachial plexus, which enters the muscle above the elbow. The skin over the muscle is supplied by roots C5 and C6.
Artery[edit | edit source]
Radial artery
