Common extensor origin

Looks like

The shared tendon attachment on the outer knob of the elbow, where the wrist and finger extensor muscles begin.

What it does

Anchors the muscles that lift the wrist and straighten the fingers.

Keeping it well

Overused by gripping it becomes 'tennis elbow'. Load management and graded exercise help; most cases settle within a year.

Related conditions

• Cubital tunnel syndrome
• Tendinopathy (tennis & golfer's elbow, Achilles, patellar)