posterior tibial artery
The posterior tibial artery (PTA) is one of the 2 branches of the tibioperoneal trunk in the lower leg and provides oxygenated blood to the posterior compartments of the leg and plantar surface of the foot. It is accompanied by the posterior tibial vein, along its course.
- origin: tibioperoneal trunk
- main branches:
- circumflex fibular artery
- medial plantar artery
- lateral plantar artery
- termination: division into medial and lateral plantar arteries within the tarsal tunnel
In posterior tibial artery aplasia, the posterior tibial arteries are absent and there is compensatory hyperplasia of the peroneal arteries.