Final answer:
Inversion and eversion are complex foot movements that involve turning the bottom of the foot towards or away from the midline. Inversion has a greater range of motion than eversion and assists with foot stability and side-to-side changes in direction.
Step-by-step explanation:
Inversion and eversion are complex movements that involve the multiple plane joints among the tarsal bones of the posterior foot (intertarsal joints).
Inversion is the turning of the foot to angle the bottom of the foot toward the midline, while eversion turns the bottom of the foot away from the midline.
The foot has a greater range of inversion than eversion motion. These movements help stabilize the foot when walking or running on uneven surfaces and aid in quick side-to-side changes in direction.