Anatomy study note · Upper limb

Radius

The lateral bone of the forearm. Its small upper end turns within the anular ligament; its broad lower end forms the main bony part of the wrist joint.

Key points

• Lateral forearm bone; head turns inside the anular ligament.
• Radial tuberosity = biceps insertion.
• Colles: distal radius, fragment posterior, dinner-fork, over 50.
• Smith: reversed Colles (fragment anterior).
• Galeazzi: radius shaft + distal radioulnar dislocation.
• Shaft: primary centre; ends: secondary centres; growth at the epiphyseal plate.
• Limb bones: limb-bud mesenchyme, endochondral (except clavicle).
• Long bone: endochondral ossification; epiphyseal plate closes ~20 y.
• Bone: type I collagen + hydroxyapatite.

The full note in the atlas also covers

Features · Articulations · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 3, PDF pp. 230–235
• Inderbir Singh’s Human Embryology, ch. 7, PDF pp. 98, 102–104; ch. 10, PDF pp. 141, 142–143, 145
• BRS Cell Biology & Histology, 7th ed., ch. 7, PDF pp. 121–125, 126–129, 130

More from the upper limb

• Rhomboid major
• Rhomboid minor
• Scapula
• Serratus anterior
• Shoulder joint
• Sternoclavicular joint
• Subclavius
• Subscapular nerves
• Subscapularis
• Supinator
• Suprascapular nerve
• Supraspinatus

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