Expansion
Plantarflexes and inverts the foot and supplies sensation to the sole
Expansion
- Motor - the posterior leg muscles (plantarflexors) and the intrinsic muscles of the sole
- Sensory - the sole of the foot, via the medial and lateral plantar nerves
- Roots - L4 to S3
It passes behind the medial malleolus through the tarsal tunnel, where it can be compressed to cause tarsal tunnel syndrome.