During supination at the subtalar joint, the axes of the transverse tarsal (midtarsal) joints become ____________________, resulting in greater ____________________ of the foot during gait
a. parallel, mobility
b. convergent, mobility
c. parallel, stability
d. convergent, stability
ANS: D
There are two axes of motion. One axis allows for abduction and adduction; the other allows for inversion and eversion. These two axes can converge or diverge. During supination of the foot, the subtalar joint becomes more rigid, and the axes converge. During pronation, the axes become parallel and the foot becomes more mobile.
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