Inversion and eversion are primary movements at which joint?

Inversion and eversion are primary movements at which joint?

• A. Talocrural joint
• B. Subtalar joint
• C. Tarsometatarsal joints
• D. Metatarsophalangeal joints

Answer: (B)

Inversion and eversion describe turning the sole of the foot inward or outward. The main joint that allows these motions is the subtalar joint, the articulation between the talus and calcaneus. At this joint, the foot can roll inward (inversion) or roll outward (eversion), which helps adapt the foot to uneven ground and adjusts leg alignment during walking and standing. The other joints have different primary roles: the talocrural joint (the ankle) mainly enables dorsiflexion and plantarflexion; the tarsometatarsal joints connect the midfoot to the forefoot with limited movement; and the metatarsophalangeal joints regulate toe flexion and extension (and some side-to-side movement) rather than inversion/eversion.

Inversion and eversion describe turning the sole of the foot inward or outward. The main joint that allows these motions is the subtalar joint, the articulation between the talus and calcaneus. At this joint, the foot can roll inward (inversion) or roll outward (eversion), which helps adapt the foot to uneven ground and adjusts leg alignment during walking and standing.

The other joints have different primary roles: the talocrural joint (the ankle) mainly enables dorsiflexion and plantarflexion; the tarsometatarsal joints connect the midfoot to the forefoot with limited movement; and the metatarsophalangeal joints regulate toe flexion and extension (and some side-to-side movement) rather than inversion/eversion.