supinator (muscle)

su·pi·na·tor (mus·cle)

[TA]

1. muscle of deep layer of proximal part of posterior compartment of forearm; origin, lateral epicondyle of humerus radial collateral and anular ligaments, and supinator ridge of ulna; insertion, anterior and lateral surface of radius; action, supinates the forearm; nerve supply, radial (posterior interosseous).

2. a muscle that supinates, that is, twists the forearm about a longitudinal axis from the pronated or neutral position toward one in which the palms face anteriorly (in the anatomic position).

Synonym(s): musculus supinator [TA], musculus supinator radii brevis

Farlex Partner Medical Dictionary © Farlex 2012