On its lower edge on either side are its lateral and medial processes (serving as the origins of the abductor hallucis and abductor digit minimi).
In the third layer, the oblique head of adductor hallucis joins the muscle's transversal head on the lateral side of the big toe.
It also provides motor innervation to flexor hallucis brevis.
Additional flexion control is provided by the flexor hallucis brevis.
It flexes the second to fifth toes and is flanked by abductor hallucis and abductor digiti minimi.
Extensor hallucis longus originates medially on the fibula and is inserted on the first digit.
These include the tibialis anterior, extensor hallucis longus, extensor digitorum longus, and peroneus tertius.
Medially to adductor hallucis are the two heads of flexor hallucis brevis, below the tendon of flexor hallucis longus.
