In passive range of motion testing, what two muscles are assessed when the foot is placed in inversion?

Passive ROM tests the antagonist muscles, in this case the muscles that Evert the foot. Active ROM and resistive ROM test the prime movers. Prime movers for Inversion= tibialis anterior /posterior, flexor digitorum longus, flexor hallucis longus, and extensor hallucis longus. Antagonists for Eversion= extensor digitorum longus, fibularis (peroneus) longus, and brevis.