<prompt> Tibialis posterior muscle is supplied by which nerve?Posterior tibial nerveDeep peroneal nerveFemoral nerveSural nerve  <response>: Ans A Posterior tibial nerveRef: Mac Glamrys Textbook of Foot and Ankle Surgery, pg. 196 Posterior tibial muscle is supplied by L5, S1 posterior tibial nerve Action: Inversion of the foot at the ankle. Test: The patient holds his foot in the inverted position while the examiner pushes outward toward eversion. Anterior tibial muscle is supplied by L4,5 deep peroneal nerve Action: Dorsiflexion of the foot at the ankle. Test: The patient dorsiflexes the foot and the examiner try to push the foot downward towards plantar extension. 