Posterior Tibial Artery Flashcards Preview

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Flashcards in Posterior Tibial Artery Deck (14):
1

General

- Terminal branch of popliteal artery
- Originates from low border of popliteus muscle between tibia and fibula
- LARGE artery
- Passes deep to soleus as it descends in the posterior leg
- Protected anteriorly by the tibia

2

Ankle joint

- At the ankle joint, the posterior tibial artery is located posterior to the medial malleolus
0 Accompanied by the tibial nerve
- Travels in a neurovascular fascial tunnel ("tarsal tunnel") deep to the flexor retinaculum, but superficial to the flexor hallucis longus tendon
- In the tunnel, the artery is medial (AKA superficial) to the tibial nerve
- The artery is surrounded by venae comitantes

3

Communicating branch

Before bifurcating, the posterior tibial artery gives off small communicating branches
- These communicate with the peroneal artery

4

Artery of tarsal canal

- The artery of the tarsal canal also branches off the posterior tibial artery prior to bifurcation
- This provides blood supply to the talus

5

Peroneal (fibular) artery

- Branches from the posterior tibial artery 2.5 cm below popliteus muscle
- Located deep in the fibular side of teh leg
- Descends along the medial border of the fibula, between the tibialis posterior and flexor hallucis longus

6

Branches of peroneal (fibular) artery

- Gives off muscular, nutrient and perforating arteries in the leg as it descends
- It then crosses the posterior aspect of the distal tibiofibular joint to give off 2 branches - the perforating branch of the peroneal artery and the posterior branch of the peroneal artery

7

Perforating branch of peroneal artery

- Pierces the interosseous membrane 5 cm superior to lateral malleolus in the anterior leg
- Runs down deep to the peroneus tertius tendon
- Anastomoses with the anterior lateral malleolar branch of the anterior tibial artery and contributes to the lateral malleolar rete
- Terminal branches of the perforating branch of the peroneal artery anastomose with the lateral tarsal branch of the dorsalis pedis

NOTE: 1-5% of perforating branches become the dorsalis pedis or occasionally the lateral tarsal artery

8

Posterior branch of peroneal artery

Crosses the ankle joint and terminates into two branches:
- Posterior lateral malleolar artery
- Lateral calcaneal arteries

9

Posterior lateral malleolar artery

- Small twig around lateral malleolus
- Contributes to the lateral malleolar arterial rete
- Retes provide blood to distal end of tibia and fibula

10

Lateral calcaneal arteries

Considered the TERMINAL branch of the peroneal artery
- Runs along the lateral heel
- Branches between the anterior and posterior lateral malleolar branches
- Anastomoses with medial calcaneal branches, which both supply the calcaneus

11

Anterior and posterior malleolar arteries

Recall... (LATERAL)
- Anterior lateral malleolar artery is a branch of the anterior tibial artery
- Posterior lateral malleolar artery is a branch from the peroneal artery

Recall... (MEDIAL)
- Anterior medial malleolar artery is a branch of the anterior tibial artery
- Posterior medial malleolar artery is a branch of the posterior tibial artery

12

Posterior medial malleolar artery

- Arises directly from posterior tibial artery
- Courses across the tibialis posterior and flexor digitorum longus muscles
- Anastomoses with the anterior medial malleolar branch of the anterior tibial artery and contributes to the rete

13

Medial calcaneal artery

- Originates from the posterior tibial artery, posterior to the medial malleolus and proximal to the bifurcation into medial and lateral plantar arteries
- Can occasionally originate from the lateral plantar artery when the bifurcation is high
- Pierces the flexor retinaculum and supplies the tendocalcaneus and heel
- Terminates as an anastomosis with the posterior medial malleolar branches of the posterior tibial artery and the lateral calcaneal branches of teh peroneal artery

14

Artery of the tarsal canal

Originates from the posterior tibial artery, prior to bifurcation