Inversion
Inversion: A frontal plane movement of the ankle in which the sole of the foot rotates inward, toward the body's midline.
- Opposing Joint Action: Eversion
- Plane of Motion: Frontal
- Direction Bias: Facing inward
- Note: Joint actions may be referred to as "osteokinematic motions" or "osteokinematic joint actions" to differentiate them from "arthrokinematic motions " (e.g., spin, glide, roll, compression, and distraction).
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Joints that Perform Inversion (and Sample Exercises):
- Ankle joint (Talocrural joint) : Inversion is a motion that involves rotation around an anterior-to-posterior axis, in which the sole of the foot faces inward. This action may be observed during an inversion ankle sprain (the most common type of ankle or sprain) or as a component of tibialis posterior activation .