During ankle ROM assessment, which movement is typically limited to about 15 degrees?

During ankle ROM assessment, which movement is typically limited to about 15 degrees?

• A. Eversion
• B. Inversion
• C. Dorsiflexion
• D. Plantarflexion

Answer: (A)

In ankle range-of-motion testing, eversion is the movement that is typically limited to about 15 degrees. This smaller range is due to the subtalar joints and the strong medial structures of the ankle, particularly the deltoid ligament, which restrain outward tilt of the foot. Because of these anatomical constraints, eversion doesn’t move as much as the other directions. In contrast, plantarflexion and dorsiflexion at the main ankle joint allow larger ranges—plantarflexion around 50 degrees and dorsiflexion around 15–20 degrees—while inversion often has a greater range than eversion. So the movement confined to roughly 15 degrees is eversion.

In ankle range-of-motion testing, eversion is the movement that is typically limited to about 15 degrees. This smaller range is due to the subtalar joints and the strong medial structures of the ankle, particularly the deltoid ligament, which restrain outward tilt of the foot. Because of these anatomical constraints, eversion doesn’t move as much as the other directions. In contrast, plantarflexion and dorsiflexion at the main ankle joint allow larger ranges—plantarflexion around 50 degrees and dorsiflexion around 15–20 degrees—while inversion often has a greater range than eversion. So the movement confined to roughly 15 degrees is eversion.