Extensor digitorum brevis muscle
The mucous sheaths of the tendons around the ankle. Lateral aspect. (Extensor dig. brevis labeled at upper right.)
Latin	musculus extensor digitorum brevis
Gray's	subject #131 490
Origin	dorsal surface of calcaneus
Insertion	proximal dorsal region of middle phalanges 2, 3 & 4
Artery	dorsalis pedis artery
Nerve	deep peroneal nerve
Actions	extends digits 2 through 4
Antagonist	Flexor digitorum longus, Flexor digitorum brevis

The extensor digitorum brevis muscle (sometimes EDB) is a muscle on the upper surface of the foot that helps extend digits 2 through 4.

Contents 1 Structure 1.1 Innervation 1.2 Action 2 See also 3 Additional images 4 External links

[edit] Structure

The extensor digitorum brevis is found on the back of the foot. It arises with the extensor hallucis brevis muscle from the calcaneus bone; many consider these two muscles are a single common muscle.

The extensor digitorum brevis divides into three tendons, which insert on the second, third, and fourth middle phalanges.

[edit] Innervation

The extensor digitorum brevis is innervated by the deep fibular nerve (deep peroneal nerve).

[edit] Action

The extensor digitorum brevis help to extend the toes to which it attaches.

[edit] See also

• Extensor digitorum longus muscle
• Extensor hallucis brevis
• Extensor digitorum muscle

[edit] Additional images

Bones of the right foot. Dorsal surface.

Muscles of the front of the leg.

Cross-section through middle of leg.

[edit] External links

• LUC edbf
• -583729075 at GPnotebook
• SUNY Labs 16:st-0405 - "The Foot: Muscles"
• extensor+digitorum+brevis+muscle at eMedicine Dictionary
• Roche Lexicon - illustrated navigator, at Elsevier 39960.000-1
• PTCentral

v • d • e List of muscles of lower limbs (TA A04.7, GA 4.465) ILIAC Region / ILIOPSOAS psoas major/psoas minor · iliacus BUTTOCKS gluteals: (maximus, medius, minimus) · tensor fasciae latae lateral rotator group: quadratus femoris · inferior gemellus · obturator internus · superior gemellus · piriformis THIGH / compartments Anterior sartorius · quadriceps (rectus femoris, vastus lateralis, vastus intermedius, vastus medialis) · articularis genu Posterior/hamstring biceps femoris · semitendinosus · semimembranosus Medial pectineus · obturator externus · gracilis · adductor (longus, brevis, magnus) Fascia Femoral sheath (Femoral canal) · Femoral ring Adductor canal · Adductor hiatus fascia lata (Iliotibial tract, Lateral intermuscular septum of thigh, Medial intermuscular septum of thigh, Fascia cribrosa/Saphenous opening) LEG/ Crus/ compartments Anterior tibialis anterior · extensor hallucis longus · extensor digitorum longus · peroneus tertius Posterior superficial · triceps surae (gastrocnemius, soleus, Achilles tendon) · plantaris deep · tarsal tunnel (flexor hallucis longus, flexor digitorum longus, tibialis posterior) · popliteus Lateral peroneus muscles (longus, brevis) Fascia Pes anserinus crural fascia (Anterior crural intermuscular septum, Posterior crural intermuscular septum, Transverse intermuscular septum) FOOT Dorsal extensor hallucis brevis · extensor digitorum brevis Plantar 1st layer (abductor hallucis, flexor digitorum brevis, abductor digiti minimi) · 2nd layer (quadratus plantae, lumbrical muscle) · 3rd layer (flexor hallucis brevis, adductor hallucis, flexor digiti minimi brevis) · 4th layer (dorsal interossei, plantar interossei) Fascia Plantar fascia retinacula (Peroneal, Inferior extensor, Superior extensor, Flexor)

This muscle article is a stub. You can help Wikipedia by expanding it. v • d • e