if weak. Once fatigue sets in, abnormal pronation is likely to increase. Extensor Hallucis Longus Muscle (EHL) The EHL dorsiflex es and assists with foot inversion . Extensor Digitorum Longus Muscle (EDL) The EDL dorsiflexes the foot. Peroneus Tertius The Peroneus Tertius is weak dorsiflexion of the ankle joint and is