Pronator Teres Humeral Head

caput humerale m. pronatoris teretis

The humeral head is the large component arising from the medial epicondyle. The median nerve passes between the humeral and ulnar heads, making the inter-head interval the site of median nerve entrapment in pronator syndrome.

Nerve: Median nerve (C6, C7) — the nerve passes… Blood Supply: Ulnar artery Region: Forearm

Anatomical Data

Origin, Insertion & Supply

Origin	Medial supracondylar ridge and medial epicondyle — common flexor origin
Insertion	Lateral surface of the radius — middle third at the pronator tubercle
Nerve Supply	Median nerve (C6, C7) — the nerve passes between the two heads
Blood Supply	Ulnar artery

Biomechanics

Function & Actions

Actions	Pronates the forearm — the primary and larger head; Assists elbow flexion

Clinical Relevance

Clinical Notes

Pronator syndrome involves compression of the median nerve between the humeral and ulnar heads of pronator teres. Symptoms mimic CTS but with forearm pain, absence of nocturnal symptoms, and reproduction by resisted pronation. The Tinel sign is at the proximal forearm rather than the wrist.

Palpation

Palpated as the anterior proximal forearm bulk — the dominant pronation muscle.

Pathology

Common Injuries & Conditions

Humeral Head PT in Pronator Syndrome

Median nerve compression between the humeral and ulnar heads of pronator teres producing forearm pain and median nerve symptoms, managed by surgical release of the pronator teres.