Extensor Hallucis brevis

Introduction

The EHB is a muscle on the top of the foot that helps to extend the big toe .It is essentially the medial part of the extensor digitorum brevis muscle.
Musculus flexor hallucis brevis1 (1).jpg

Anatomy

Origin

From distal part of superior and lateral surface of calcaneus ,lateral talocalcaneal ligament and apex of inferior extensor retinaculum.

Insersion

To dorsal surface of base of proximal phalanx of big toe .

Nerve supply

Deep peroneal L4 ,L5 , S1 .

Action

Extend the metatarsophalangeal joint of the big toe .

Blood supply

The perforating branch of the peroneal artery, anterior lateral malleolar artery, lateral tarsal arteries, dorsalis pedis artery, arcuate artery, first dorsal metatarsal artery, and dorsal digital arteries