As people will know ,the abductor hallucis muscle is one of the larger intrinsic muscles of the foot ,but what does it actually do ?
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If you look at an anatomy textbook you will probably find its actions described as "toe flexion and abduction" . However ,if you look at some modern research texts , you might find its actions described thus -
"The action of the abductor hallucis is to flex and supinate the first metatarsal, invert the calcaneus, externally rotate the tibia, and elevate the medial longitudinal arch. (Nicholas Campitelli -Podiatry Today 2014 " with no mention of toe flexion/abduction at all .
In my opinion ,if you are going to discuss the role of the abductor hallucis muscle in supporting /raising the medial longitudinal arch ,you must acknowledge the levering effect that a plantarflexing great toe has on the mechanics of the foot as a whole . Generally ,this does not happen .
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