Midtarsal joint range of motion:
For pedagogical reasons, the midtarsal joint can be considered as functioning about two axis of motion (evidence is clear that this joint does not, in reality, move about two axes) .
Oblique axis:
• range of motion not known
• allows for forefoot adduction/abduction and dorsiflexion of the forefoot relative to the rearfoot
Longitudinal axis:
• range of motion not known
• allows for inversion/eversion of the forefoot relative to the rearfoot
Clinical use:
• adequate range of motion is needed for normal function
• range of motion available at joint may be useful in predicting how the foot compensates for other structural and functional variations (eg if less than 10 degrees of dorsiflexion is available at the ankle joint, the compensation for this can occur by pronation at the oblique axis of the midtarsal joint if there is adequate motion available for this)
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