Posterior
Flexor Hallucis Longus
The flexor hallucis longus is a deep muscle in the posterior compartment of the leg that assists in movements of the ankle, foot, and digit 1 (big toe, hallux).
Gastrocnemius
The gastrocnemius is a superficial two-headed muscle of the posterior compartment of the leg and one of the two muscles that make up the triceps surae.