Which muscle dorsi flexes the ankle?

The tibialis anterior is the primary muscle responsible for dorsiflexion of the ankle. Dorsiflexion refers to the movement that brings the top of the foot closer to the shin, which is essential for activities such as walking and running. The tibialis anterior is located on the front of the lower leg and is activated when you need to lift your foot upwards during these movements.

In contrast, the peroneus longus primarily aids in eversion and plantarflexion of the foot, which does not contribute to dorsiflexion. The adductors are primarily involved in bringing the legs together and do not affect ankle movement. The brachioradialis, while a muscle of the forearm, is involved in flexing the elbow joint, not ankle movement at all. Therefore, the tibialis anterior is uniquely positioned and activated to perform the action of dorsiflexion effectively.