(Jon of the Clue Crew walks with crutches.)  Crutches are an example of a simple lever; the tip of the crutch acts as this point on whcih a lever turns
If the patient needs bilateral assistance 
to walk due to severe ataxia, the EDSS Score will be ... For example if patient 
replies that he can walk 5000 metrs - is it enough for "unrestricted .... device, such 
as a cane or crutch, then the use of an AFO is not considered unilateral 
assistance.