Dorsiflexion of the foot is a medical term that refers to the bending of the foot upwards at the ankle. Dorsiflexion is an important movement for activities such as walking, running, and jumping. It allows us to raise our heel off the ground and makes these activities possible.
What Muscles Produce Dorsiflexion?
Dorsiflexion of the foot is produced by three main muscle groups: the tibialis anterior, extensor digitorum longus, and peroneus tertius.
The tibialis anterior is the primary muscle responsible for dorsiflexion. It originates on tibia (shinbone) and inserts on the first metatarsal bone and first cuneiform bone (two bones in the foot). The tibialis anterior muscle acts to bring the foot toward the shin and is used when walking up stairs or slopes.
The extensor digitorum longus muscle also originates on the leg and inserts on top of several bones in the foot. This muscle extends all four toes and assists in dorsiflexion.
The peroneus tertius muscle arises from the fibula and inserts into the fifth metatarsal bone. This muscle everts (turns outwards) the foot and also aids in dorsiflexion.
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