Pronator Teres Anatomy

Pronator Teres Muscle

Origin:  Humeral head: superior portion of the medial epicondyle via the common flexor tendon.
Ulnar head: coronoid process of the ulna.
Insertion:  Lateral aspect of the mid shaft of the radius.
Actions: Pronation of the forearm
Innervation: Median nerve (C6 C7)
Blood Supply: Muscular branches from the ulnar and radial arteries.

Primary Actions of the Pronator Teres

1. Pronation of the Forearm
Agonists:

  • Pronator Quadratus

Antagonists: 

  • Biceps Brachii, Supinator

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Secondary Actions of the Pronator Teres

2. Assists with flexion of the forearm at the elbow
Agonists:

  • Brachialis
  • Biceps Brachii
  • Brachioradialis

Antagonists:

  • Triceps Brachii
  • Anconeus