Review Question - QID 5490

A 50-year-old male presents with ongoing plantar medial heel pain for the past few months. It is associated with the first step in the morning and eases up after he takes a few additional steps. He has attempted physical therapy, including Achilles stretching, heel cups, and ice massage with no relief. On physical examination, there is pain over the plantar medial heel with a Tinel’s sign elicited just proximal to the abductor hallucis musculature. The pain radiates to the base of the 5th metatarsal. A Tinel’s sign over the posterior tibial nerve is not found. Innervation of which anatomic structure is most likely affected in this patient?