- 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 offorearm ,flexes elbow
Antagonist =Supinator muscle
Blood =ulnar artery andradial artery
Nerve =median nerve
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DorlandsPre = m_22
DorlandsSuf = 12550260The pronator teres is a
muscle of thehuman body (located mainly in theforearm ) that, along with thepronator 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 thehumerus and from thecommon 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 theulnar 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 thesupinator .The lateral border of the muscle forms the medial boundary of triangular hollow known as the
cubital fossa , which is situated in front of theelbow-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 thebiceps brachii , and from thebrachialis occasionally occur.Clinical aspects
"Pronator teres syndrome" is one common cause of
wrist pain.ee also
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Pronator quadratus
*Supinator
*Cubital fossa
=AdditionalExternal links
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* [http://www.ptcentral.com/muscles/musclearms.html#pronator%20teres PTCentral]
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