Osteology of the Radius and ulna Flashcards
Body of Radius
Pronounced interosseous border.
Shaft of the radius.
Neck of the Radius
Narrow area between the head and shaft.
Head of Radius
Also called articular circumference.
Articulates with the radial notch of the ulna.
Articular surface on top articulates with capitulum of humerus.
Radial tuberosity
Anteromedial, just below the radial head.
Rough surface
Attachment: biceps brachii muscle.
Lister’s tubercle
Dorsal, posterior tubercle of the radius.
Lateral to the sulcus for the pollicis longus tendon.
Interosseal margin of the radius
Line down form the head down to each side of the dorsal radioulnar articular surface, on medial side of radius.
Radial styloid process
Most dorsolateral point of the radius.
Lower than the styloid process of ulna.
Distal articular surfaces of radius
Lateral surface articulates with the scaphoid bone.
Medial surface articulates with the lunate bone.
Body of Ulna
Shaft
Long and thin.
Ulnar tuberosity
Rough area.
Attachment: brachialis muscle.
Just below the coronoid process on the anterior side.
Crest of Supinator muscle
Ulna
Proximal part the interosseous border. Anterolateral
Attachment: supinator muscles.
Olecranon
Apex articulated with olecranon fossa of humerus in elbow extension. Most prominent part.
Attachments: triceps brachii, anconeus muscles.
Coronoid process
Sharp triangular eminence on proximal anterior part.
Attachments: brachialis muscle.
Goes into the coronoid fossa of humerus during elbow flexion.
Trochlear notch
Articulated with the trochlea of the humerus
Divided in 2 parts (superior, inferior).
Lateral part of inferior surface is the radial notch.
Receives the head of the radius.
Styloid process of ulna
Posterior prominence of the head of the ulna.
Distal, posterior.
Attachment: ulnar collateral ligament.
Higher than the styloid process of radius
