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Supinator
Other Terms:
Musculus supinator,
Muscle supinateur
Muscle parts
None
Latin name
Musculus supinator
Latin muscle parts
None
Group
Antebrachial muscle – posterior compartment – lateral group
Etymology
The English name for this muscle is the muscle that makes the hand lay on its back. The word supinator comes from the Latin supinum meaning “lying on its back.”
Origin
Posterior surface of the lateral epicondyle of the humerus, radial collateral ligament, annular ligament, and the lateral edge of the proximal ulna
Insertion
Lateral and anterior surfaces of the proximal third of the shaft of radius
Action
Supination (active in all phases and ranges of supination, though not as powerful as the biceps)
Nerve supply
Radial nerve (C6 and C7)
Blood supply
The muscle receives direct muscular branches from the radial artery, in addition to branches from the posterior interosseous, radial recurrent, recurrent interosseous, and middle collateral arteries.
Latin
Musculus supinator
French
Muscle supinateur
