- Skeletal system
- Head muscles
- Neck muscles
- Muscles of upper limb
- Muscles of pectoral girdle
- Muscles of shoulder region
- Muscles of upper arm
- Muscles of forearm
- Anterior compartment
- Lateral compartment
- Posterior compartment
- Muscles of hand
- Thoracic muscles
- Muscles of back
- Muscles of lower limb
- Blood vessels
- Respiratory system
- Digestive system
- Endocrine glands
- Nervous system
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- Male reproductive system
The pronator teres (Latin: musculus pronator teres) is a fusiform-shaped muscle of the upper limb that extends between the humerus, radius and ulna. It belongs to the anterior muscles of the forearm and is classified as one of the forearm flexors. The pronator teres lies in the first, most superficial layer of the anterior compartment. This muscle is composed of two heads - humeral (superficial) and ulnar (deep).
Humeral head - medial supracondylar ridge of humerus
Ulnar head - coronoid process of ulna
|Insertion||Lateral surface of radius|
|Action||Flexion and pronation of forearm|
|Innervation||Median nerve (C6, C7)|
|Blood supply||Branches of ulnar, radial and brachial arteries|
The humeral head of the pronator teres muscle originates superior to the medial epicondyle of the humerus - from the medial supracondylar ridge. In contrast, the ulnar head arises from the coronoid process of the ulna.
The pronator teres extends in an oblique manner to the radial side of the forearm and forms a flat tendon that inserts on the middle aspect of the lateral surface of the radius.
The pronator teres muscle provides the flexion and pronation of the forearm at the elbow and proximal radioulnar joints, respectively.
The pronator teres is innervated by the median nerve (C6, C7) - a branch of the brachial plexus.
The pronator teres muscle receives arterial blood supply from the branches of the radial, brachial and ulnar arteries.