Which is an action of tibialis posterior?

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Multiple Choice

Which is an action of tibialis posterior?

Explanation:
Tibialis posterior mainly inverts the foot and helps with plantarflexion, while also supporting the arch of the foot. Its tendon runs behind the medial ankle and attaches to midfoot bones, so its primary job is to turn the sole inward (inversion). Dorsiflexion is done by muscles in the front of the leg, not this one, and eversion is produced mostly by the fibular muscles on the outside. So, among the options, inverting the foot best captures the characteristic action of tibialis posterior (with plantarflexion also being a possible action).

Tibialis posterior mainly inverts the foot and helps with plantarflexion, while also supporting the arch of the foot. Its tendon runs behind the medial ankle and attaches to midfoot bones, so its primary job is to turn the sole inward (inversion). Dorsiflexion is done by muscles in the front of the leg, not this one, and eversion is produced mostly by the fibular muscles on the outside. So, among the options, inverting the foot best captures the characteristic action of tibialis posterior (with plantarflexion also being a possible action).

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