Radius and Ulna

The Radius is lateral, the Ulna is medial.

Ulna (pl. ulnae):

Important Features:

Olecranon Process: Named due to its articulation with the olecranon fossa of the humerus

Ulnar Tuberosity: Obvious tuberosity in the proximal half of the bone

Coronoid Process: Named due to its projection into the coronoid fossa of the humerus when flexing the forearm at the elbow

Trochlear Notch: Articulates with the trochlea of the humerus

Radial Notch: Receives the head of the Radius

Head: At the DISTAL end

Styloid Process: Jutts out of the head

Radius (pl. radii):

Important Features:

Head: Articulates with the capitulum of the humerus. Is at the proximal end.

Radial Tuberosity: Medial and visible from the posterior view

Ulnar Notch: Articulates with the head of the ulna and is therefore located at the distal end

Styloid Process: Emerges from the distal end


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