🦴 Radius

Brian Lee
Review Pending

Bony Landmarks

Head

Disc-shaped proximal epiphysis that articulates with the humerus and ulna.

Neck

Narrow region just distal to the head; common fracture site.

Radial Tuberosity

Rough anterior projection on the proximal radius where 💪 biceps inserts.

Interosseous Border

Sharp medial edge along the shaft for attachment of the interosseous membrane.

Ulnar Notch

Distal medial concavity articulating with the head of the ulna.

Dorsal Tubercle

Posterior distal bump (Lister’s tubercle) guiding externsor pollicis longus tendon.

Styloid Process

Pointed distal projection that anchors the radial collateral ligament and 💪 brachioradialis.

Muscles Insertions

💪 Biceps

• Radial tuberosity, bicipital aponeurosis
• Supination of the forearm and elbow flexion

💪 Pronator Teres

• Lateral surface of the radius (midshaft)
• Pronates and weakly flexes the forearm

Supinator *

• Proximal lateral radius
• Supination of the forearm

💪 Brachioradialis

• Styloid process of 🦴 radius
• Flexion of the forearm at the elbow

* Supinator is a deep muscle and shown here for completeness.

References

• Wikipedia
• 📕 Goldfinger 1991, 24-25.