radius

the radius is thin at its proximal end and

widened at the distal end

head of radius

shaped like the end of a spool of thread

the head of the radius articulates with the

capitulum of humerus

the head medially articulates with radial notch of the ulna forming the

proximal radioulnar joint

neck of radius

narrowed region that extends from the radial head to the radial tuberosity

radial tuberosity

attachment site for the biceps brachii muscle, flexes the elbow, swings forearm toward arm

ulnar notch

medial, articulates with head of the ulna, forming the distal radioulnar joint

styloid process

lateral, anchors ligament to wrist

extreme distal end of radius is

concave

the extreme distal end of the radius also articulates with

carpal bones of the wrist

radius contributes heavily to the

wrist joint