Pronator

Pronator

The Pronator is a type of muscle in the human body that serves to rotate parts of the body. There are two main pronator muscles in the human forearm: the Pronator teres and the Pronator quadratus. These muscles are primarily responsible for the pronation of the forearm, which is the action of turning the hand so that the palm faces downwards or backwards.

Anatomy

Pronator Teres

The Pronator teres is one of the muscles of the superficial flexor group of the anterior compartment of the forearm. It originates from the medial epicondyle of the Humerus and the coronoid process of the Ulna, and inserts into the middle of the lateral surface of the Radius.

Pronator Quadratus

The Pronator quadratus is a square shaped muscle that lies deep within the forearm. It originates from the distal portion of the anterior ulna and inserts into the distal portion of the anterior radius.

Function

The main function of the pronator muscles is to perform pronation of the forearm. This is the action of turning the hand so that the palm faces downwards or backwards. The pronator teres also assists in flexion of the elbow.

Clinical Significance

Damage or injury to the pronator muscles can lead to a loss of pronation ability, which can significantly impact a person's ability to perform daily tasks. Conditions such as Pronator teres syndrome can cause pain and discomfort in the forearm and hand.

See Also

• Supinator muscle
• Forearm
• Muscular system

References

Pronator Resources
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