the fibularis brevis originates at the middlelateralfibula, inserts at the 5thmetatarsal and its action is plantar flexion and eversion
the fibularis longus originates at the head of the fibula, inserts at the bottom of the medial cuneiform and its action is plantar flexion and eversion
the tibialis posterior originates on the posterior tibia, inserts at the naviculartuberosity, medialcuneiform, and metatarsals 2-4, and its action is plantar flexion and inversion