Pronator Teres

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The Pronator Teres is in the Superficial Layer of the Anterior Compartment of the forearm.

The Pronator Teres has two heads: Humeral Head and Ulnar Head.

ATTACHMENTS:

• Medial epicondyle of the humerus via the common flexor belly/tendon to the lateral radius.
  • The ulnar head attaches proximally onto the coronoid process of the ulna.
  • The humeral head also attaches onto the medial supracondylar ridge of the humerus.
  • The distal attachment is on the middle 1/3 of the lateral radius.

ACTIONS:

• Pronates the forearm at the radioulnar joints.
• Flexes the forearm at the elbow joint.

NOTES:

1. The pronator teres is one of five muscles of the common flexor belly/tendon that is involved with medial elbow tendinopathy (aka golfer’s elbow).
2. The median nerve runs between the two heads of the pronator teres. If the pronator teres is tight (overly facilitated), it can compress the median nerve causing symptoms that mimic carpal tunnel syndrome. This condition is called pronator teres syndrome.