Supinator
Supinator
Supinator (pronounced soo-pi-nay-tor) is a muscle in the forearm that plays a crucial role in the rotation of the forearm and hand.
Etymology
The term 'Supinator' is derived from the Latin word 'supinare', which means 'to lay on the back'. This is in reference to the action of the muscle, which is to turn the palm upwards or forwards.
Anatomy
The Supinator muscle is located in the posterior compartment of the forearm, lateral to the elbow. It is a broad, flat muscle that wraps around the upper third of the radius, one of the two long bones in the forearm. The supinator muscle is responsible for the supination of the forearm, i.e., it turns the palm of the hand to face upwards or forwards.
Function
The primary function of the supinator muscle is to supinate the forearm. This action is crucial for many daily activities, such as turning a key, using a screwdriver, or opening a door. The supinator muscle works in conjunction with other muscles in the forearm, including the biceps brachii, to perform these actions.
Related Terms
- Pronator teres: A muscle in the forearm that performs the opposite action to the supinator, i.e., it pronates the forearm (turns the palm downwards or backwards).
- Biceps brachii: A muscle in the upper arm that assists the supinator in turning the palm upwards.
- Radius (bone): One of the two long bones in the forearm, around which the supinator muscle wraps.
See Also
External links
- Medical encyclopedia article on Supinator
- Wikipedia's article - Supinator
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