Anatomy and Tributaries of the Anterior Tibial Artery

Courtesy: Prof Nabil Ebraheim, University of TOledo, Ohio, USA

Overview

• The anterior tibial artery is one of the terminal branches of the popliteal artery.
• It supplies the anterior compartment of the leg and continues distally as the dorsalis pedis artery.
• Understanding its course and anatomical relationships is important in trauma, orthopedic surgery, and vascular assessment.

Origin of the Anterior Tibial Artery

• The popliteal artery divides into two major branches:
  • Anterior tibial artery
  • Posterior tibial artery
• In some individuals, the division occurs as:
  • Anterior tibial artery
  • Tibioperoneal trunk
• The tibioperoneal trunk then divides into:
  • Posterior tibial artery
  • Peroneal artery

Course of the Anterior Tibial Artery

• The artery arises just below the popliteus muscle.
• It passes through the interosseous membrane to enter the anterior compartment of the leg.
• It then descends along the anterior aspect of the leg toward the ankle.

Branches

The anterior tibial artery gives off important branches including:

• Anterior tibial recurrent artery
• Posterior tibial recurrent artery

Clinical Importance

• The anterior tibial recurrent artery may be injured in tibial tubercle fractures in children.
• Such injury can contribute to compartment syndrome of the leg.

Relations in the Leg

Proximal Leg

• The anterior tibial artery lies between:
  • Tibialis anterior muscle (medially)
  • Extensor digitorum longus muscle (laterally)

Middle Leg

• The extensor hallucis longus muscle appears between these muscles.
• At this level the artery lies between:
  • Tibialis anterior
  • Extensor hallucis longus

Distal Leg

• The extensor hallucis longus tendon crosses medially toward the great toe.
• The artery then lies between:
  • Extensor hallucis longus (medially)
  • Extensor digitorum longus (laterally)

Arrangement of Structures at the Anterior Ankle

At the level of the ankle joint, the structures are arranged from medial to lateral.

A common memory aid is:

Tom Has Very Nice Dog

Meaning:

• T – Tibialis anterior tendon
• H – Extensor hallucis longus tendon
• V – Vessels (anterior tibial artery)
• N – Deep peroneal nerve
• D – Extensor digitorum longus tendon

Important note:

• This arrangement applies mainly at the distal leg and anterior ankle, not in the proximal or middle portions of the leg.

Dorsalis Pedis Artery

• After passing beneath the extensor retinaculum, the anterior tibial artery becomes the dorsalis pedis artery.
• The dorsalis pedis artery supplies the dorsum of the foot and is an important site for palpation of peripheral pulses.

Deep Peroneal Nerve

• The deep peroneal nerve accompanies the anterior tibial artery.
• It enters the anterior compartment by piercing the intermuscular septum.
• It passes through the extensor digitorum longus muscle.

Relationship with the Artery

The position of the nerve changes along the course of the artery:

• Proximally: nerve lies lateral to the artery
• Middle part: nerve crosses anterior to the artery
• Distally: nerve again lies lateral to the artery

Radiological and Surgical Importance

• Imaging such as computed tomography angiography around the knee can demonstrate the branching pattern of the popliteal artery.
• At the level of the distal femur and proximal tibia, the following arteries may be visualized:
  • Anterior tibial artery
  • Posterior tibial artery
  • Peroneal artery

Surgical Considerations

• During orthopedic procedures around the proximal tibia, careful placement of retractors is necessary.
• Improper retractor placement may damage the branches of the popliteal artery.
• This is particularly important because the bifurcation of the popliteal artery occurs in this region.

Summary Points

• The anterior tibial artery arises from the popliteal artery below the popliteus muscle.
• It passes through the interosseous membrane to enter the anterior compartment of the leg.
• It runs with the deep peroneal nerve and continues as the dorsalis pedis artery at the ankle.
• The anterior ankle structures follow the Tom Has Very Nice Dog arrangement from medial to lateral.
• Knowledge of this anatomy is essential for vascular assessment, trauma management, and orthopedic surgery.