Pronator teres muscle

Muscle infobox
Name = Pronator teres muscle
Latin = musculus pronator teres
GraySubject = 125
GrayPage = 446


Caption = Anterior view of the left forearm. Superficial muscles. (Pronator teres labeled at center.)
Width = 194
Origin = "humeral head": medial epicondyle of humerus (common flexor tendon)
"ulnar head": coronoid process of ulna
Insertion = radius
Action = pronation of forearm, flexes elbow
Antagonist = Supinator muscle
Blood = ulnar artery and radial artery
Nerve = median nerve
MeshName =
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DorlandsPre = m_22
DorlandsSuf = 12550260

The pronator teres is a muscle of the human body (located mainly in the forearm) that, along with the pronator quadratus, serves to pronate the forearm (turning it so the palm faces downward).

tructure

The pronator teres has two heads--humeral and ulnar.

The humeral head, the larger and more superficial, arises immediately above the medial epicondyle of the humerus and from the common flexor tendon.

The ulnar head is a thin fasciculus, which arises from the medial side of the coronoid process of the ulna, and joins the preceding at an acute angle.

The median nerve enters the forearm between the two heads of the muscle, and is separated from the ulnar artery by the ulnar head.

The muscle passes obliquely across the forearm, and ends in a flat tendon, which is inserted into a rough impression at the middle of the lateral surface of the body of the radius, just below the insertion of the supinator.

The lateral border of the muscle forms the medial boundary of triangular hollow known as the cubital fossa, which is situated in front of the elbow-joint.

Innervation

The pronator teres is innervated by the median nerve.

Variations

Occasionally, the ulnar head is absent. Also, additional slips from the medial intermuscular septum, from the biceps brachii, and from the brachialis occasionally occur.

Clinical aspects

"Pronator teres syndrome" is one common cause of wrist pain.

ee also

* Pronator quadratus
* Supinator
* Cubital fossa


=Additional

External links

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* [http://www.ptcentral.com/muscles/musclearms.html#pronator%20teres PTCentral]


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Look at other dictionaries:

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  • pronator teres — ˈtiˌrēz noun Etymology: New Latin, literally, smooth or rounded pronator : a muscle of the forearm, arising from the medial epicondyle of the humerus, inserting into the lateral surface of the middle third of the radius, and serving to pronate… …   Useful english dictionary

  • pronator teres — pronator te·res tir .ēz n a muscle of the forearm arising from the medial epicondyle of the humerus and the coronoid process of the ulna, inserting into the lateral surface of the middle third of the radius, and serving to pronate and flex the… …   Medical dictionary

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  • pronator syndrome — pronator teres syndrome an entrapment neuropathy in which the median nerve or its anterior interosseous branch is compressed by the structures of the cubital fossa or by its passage between the heads of the pronator teres muscle, causing pain in… …   Medical dictionary

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