Click on the structure to specify the target of your label
 |
 |
 |
||
 |
 |
 |
 |
 |
01 |  |
Extensor pollicis longus
Other Terms:
Musculus extensor pollicis longus,
Muscle long extenseur du pouce
Muscle parts
None
Latin name
Musculus extensor pollicis longus
Latin muscle parts
None
Group
Antebrachial muscle – posterior compartment – radial group
Etymology
In English this muscle’s name is the long muscle that straightens the thumb. The word extensor comes from the Latin ex meaning “out from” and tendere meaning “to stretch.” The Latin pollex meaning “thumb” arises from the Latin polleo meaning “to be strong,” as the thumb was the strongest of the fingers. Longus is the Latin term meaning “long.” This is being used as a comparative reference to a shorter muscle that does the same thing.
Origin
Lateral side of the posterior surface of the ulna distal to the abductor pollicis longus and the adjacent interosseous membrane
Insertion
Posterior surface of the base of distal phalanx of the thumb
Action
Extends the metacarpal bone and the proximal and distal phalanges of the thumb
Nerve supply
Radial nerve (C7 and C8)
Blood supply
From proximal to distal, the muscle belly receives blood from the posterior interosseous artery and perforating branches from the anterior interosseous artery. The distal tendon receives blood from the a branch of the radial artery in the anatomical snuff box, the dorsal metacarpal artery, and small branches from the dorsal carpal arch.
Latin
Musculus extensor pollicis longus
French
Muscle long extenseur du pouce
