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Dorsum of The Foot

Interactive Anatomical Interface

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Fibula
Tibia
Talus
Calcaneus
Cuboid Bone
Cuneiform Bones
Intermediate Cuneiform
Navicular
Metatarsal
Medial Cuneiform
Proximal phalanx
Distal Phalanx
Middle Phalanx

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Fibula
Tibia
Talus
Calcaneus
Cuboid Bone
Cuneiform Bones
Intermediate Cuneiform

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Navicular
Metatarsal
Medial Cuneiform
Proximal phalanx
Distal Phalanx
Middle Phalanx
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Plantar Aponeurosis
Interphalangeal ( proximal ) ligaments
Interphalangeal ( distal ) ligaments
Interphalangeal ligament of hallux
plantar calcaneonavicular ligament
Inferior extensor retinaculum
Flexor Retinaculum
deep transverse metatarsal
Distal phalanx
Proximal phalanx
Metatarsal
Middle phalanx
Medial Cuneiform
Intermediate cuneiform
Cuboid
navicular
talus
Calcaneus
Tibia
Fibula
Lateral cuneiform

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Plantar Aponeurosis
Middle phalanx
Interphalangeal ligament of hallux
plantar calcaneonavicular ligament
Inferior extensor retinaculum
Flexor Retinaculum
deep transverse metatarsal
Distal phalanx
Proximal phalanx

Highlight
Metatarsal
Interphalangeal ( distal ) ligaments
Interphalangeal ( proximal ) ligaments
Medial Cuneiform
Intermediate cuneiform
CUboid
navicular
talus
Calcaneus
Tibia
Fibula
Lateral cuneiform

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Related:   Carpal Tunnel

Sensory Innervation of The Dorsum of The Foot

4 sets of nerves supply the sensory nervous supply to the dorsum of the foot :

  • Superficial peroneal (musculocutaneous) nerve: With the exception of the skin of the cleft between the first and 2nd toes. it supplies sensory nerves to the majority of the dorsum of the foot . It also supplies medial margin of the great toe.
  • Deep peroneal nerve: It gives nerve supply to the cleft between the first and 2nd toes.
  • Sural nerve: It supplies lateral margin of the dorsum of the foot and lateral margin of the little toe.
  • Saphenous nerve: It supplies medial margins of the dorsum of the foot up to the head of the very first metatarsal.

Muscles of The Dorsum of The Foot

All these are as follows:

Extensor Digitorum Brevis

It’s a small muscle situated on the lateral part of the dorsum of the foot, deep to the tendons of extensor digitorum longus. It’s the only muscle on the dorsum of the foot and creates a fleshy swelling anterior to the lateral malleolus. The young beginner physicians sometime diagnose it as a contusion.

Origin

It originates from the anterior part of the superior surface of calcaneum, medial to the connection of the stalk of inferior extensor retinaculum.

Insertion

  • The muscle splits into 4 tendons for the medial 4 toes. The tendon to the big toe crosses in front of dorsalis pedis artery and inserts on the dorsal surface of the proximal phalanx of the big toe. The Lateral 3 tendons join the lateral side of the tendons of the extensor digitorum longus to the 2nd, third, and fourth toes.
  • Medial most part of the extensor digitorum brevis, which creates the tendon for the big toe, splits or becomes different early. It’s called extensor hallucis brevis.
Related:   Superficial Temporal Artery

Nerve Supply

It’s by the lateral terminal branch of the deep peroneal nerve.

Actions

  • Extensor hallucis brevis (EHB) stretches the metatarsophalangeal joint of the big toe.
  • The other 3 tendons stretch the metatarsophalangeal and interphalangeal joints of 2nd, third, and fourth toes, especially when the foot is dorsiflexed.

Dorsalis Pedis Artery

The dorsalis pedis artery is the just the continuation of the anterior tibial artery. So it starts as the anterior tibial artery passes by the ankle joint. It goes anteriorly over the dorsal aspect of the talus, navicular, and intermediate cuneiform bones, and then passes inferiorly, as the deep plantar artery, between the two heads of the first dorsal interosseous muscle to join the deep plantar arch in the sole of the foot. The pulse of the dorsalis pedis artery on the dorsal surface of the foot can be felt by gently palpating the vessel against the underlying tarsal bones between the tendons of the extensor hallucis longus and the extensor digitorum longus to the second toe.


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By | 2018-08-08T00:00:00+00:00 August 8th, 2018|Anatomy, Lower Limb|0 Comments