can the muscle tone be changed by perhaps giving her more stability proximally to allow distal control and therefore increase her selective movement? Maybe also desensitisation techniques may help to directly reduce the tone and allow selective movement. I have had some luck using a device called a malleoloc which mimics a figure of 8 strapping technique to increase ankle joint stabiltiy and prevent inversion/eversion. Strapping I find is good in the interim but as a longer term measure its not the answer. I think also perhaps the device called a "toe off" similar to the one Richard is talking about may be worth trying. It aid the swing phase of gait and give some dosiflexion support. E mail me if you want any of the suppliers.