extensor digital expansion (extensor aponeurosis, dorsal hood, dorsal expansion)

Introduction

A traingular tendinous aponeurosis including the tendon of the extensor digitorum centrally, interosseous tendon on each side & a lumbrical tendon laterally.

• covers the dorsal aspect of the metacarpophalangeal joint & the proximal phalanx

A comparable structure occurs on the foot.

More general terms

• tendon

Additional terms

• extensor muscles of wrist

Component of

• hand
• foot