Pronator Teres

Musculus pronator teres is the Latin pronunciation for Pronator Teres Muscle. The word Pronator comes from Pronus which means inclined forward or lying face downward. Pronator Muscle is found in the Forearm of the Human Body. Pronator teres along with Pronator Quadratus Muscle help Pronate the Forearm (Turning so the Palm faces posteriorly).

Extensor Retinaculum Posterior Extensor Carpi Radialis Longus Muscle Biceps Brachii Muscle Brachialis Muscle Dorsal Interossei Muscle Extensor Carpi Ulnaris Muscle Extensor Digitorum Communis Muscle Triceps Brachii Muscles Deltoid Muscle of Upperarm Brachioradialis Muscle

Pronator Teres

ANATOMY

There are two heads of Pronator Teres Muscle that are:

Humeral: It is the larger and superficial head arising from the Medial Supracondylar Ridge (Medial border of Humerus raised in a ridge), superior to the Medial Epicondyle of the Humerus forming the Common Flexor Tendon (tendon shared by Superficial flexor muscles of Forearm).
Ulnar: It is thin Fasiculus arising from the Medial side of Coronoid Process (triangular eminence flat from sides) of ulna.

Lateral side of the Pronator Teres Muscle forms a Triangular hollow called Cubital Fossa situated anterior to Elbow. Muscle pass over the forearm ending in a flat tendon which is inserted in the middle of the body of Radius.

INNERVATION

The Pronator Teres Muscle is innervated by the Median Nerve which is one of the five nerves of Brachial Plexus.

BLOOD SUPPLY

The blood supply to the muscle is provided through Ulnar Artery and Anterior Recurrent Ulnar Artery.

FUNCTION

The main function of Pronator Teres Muscle is to pronate the Forearm i.e. to turn the hand posterior. It is helped by the Pronator Quadratus Muscle. It also helps in weak flexing of elbow.

CLINICAL SIGNIFICANCE

There are many clinical aspects due to the affecting of Pronator Teres Muscle. Pronator Teres Syndrome is one of them which cause pain in wrist.

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