Pronator teres muscle 3042730 224133350 2008-07-07T13:40:30Z Vedran12 7322109 interwiki hr {{Muscle infobox | Name = Pronator teres muscle | Latin = musculus pronator teres | GraySubject = 125 | GrayPage = 446 | Image = Pronator-teres.png | Caption = Front of the left forearm. Superficial muscles. (Pronator teres labeled at center.) | Width = 194 | Origin = ''humeral head'': [[medial epicondyle of humerus]] ([[common flexor tendon]]) <BR> ''ulnar head'': [[coronoid process of ulna]] | Insertion = [[radius]] | Action = [[pronation]] of [[forearm]], [[flexes]] [[Elbow-joint|elbow]] | Antagonist = [[Supinator muscle]] | Blood = [[ulnar artery]] and [[radial artery]] | Nerve = [[median nerve]] | MeshName = | MeshNumber = | 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). ===Structure=== 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. ==See also== * [[Pronator quadratus]] * [[Supinator]] * [[Cubital fossa]] ==Additional images== <gallery> Image:Gray207.png|Left humerus. Anterior view. Image:Gray213.png|Bones of left forearm. Anterior aspect. Image:Gray417_color.PNG|Cross-section through the middle of the forearm. Image:Gray525.png|The brachial artery. Image:Gray527.png|The radial and ulnar arteries. </gallery> ==External links== * {{MuscleLoyola|prt}} * {{MuscleUWash|pronatorteres}} * {{GPnotebook|-234487749}} * {{DukeOrtho|pronator_teres}} * [http://www.ptcentral.com/muscles/musclearms.html#pronator%20teres PTCentral] {{Gray's}} {{Muscles_of_upper_limb}} [[Category:Muscles of the upper limb]] {{muscle-stub}} [[ar:عضلة كابة مدورة]] [[de:Musculus pronator teres]] [[fr:Muscle rond pronateur]] [[hr:Obli pronator]] [[id:Otot pronator teres]] [[he:השריר הכפן העגול]] [[hu:Hengeres borintóizom]] [[nl:Musculus pronator teres]] [[ja:円回内筋]] [[pl:Mięsień nawrotny obły]] [[pt:Músculo pronador redondo]] [[sv:Pronator teres]] [[sl:Zgornja obračalka]] [[th:กล้ามเนื้อโปรเนเตอร์ เทเรส]]