Origin vs insertion: Tendons attach muscles to bone. Origin is where muscle starts (pretty obvious, huh?) while insertion is where action is performed. In the case of posterior tibial tendon, it originates high up to back of tibia & inserts in bottom of foot. Check out http://mydoctor.kaiserpermanente.org/ncal/facilities/region/santarosa/area_master/departments/Footandankle/footandankle_posterior_tibial_tendon.jsp
Answered 5/29/2015
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