Cerebral Palsy maybe/maybe not

as to advance the stiff foot forward and then sets the stiff left side down in such a way as to balance both sides. Once firmly set down the intact side pole vaults, using the rigid left side as the pole. The left hip joint does nothing. Attacking the left hip flexibility will accomplish nothing. In fact, the rigidity of BOTH the stiff hip and knee help, as the intact side could not depend on what the left side might do if it varied unexpectedly (without sharing proprioception). In essence it is a peg leg on the stiff side with the entire stiff side of the body (shoulder to toe) being the peg. Proprioception is totally right sided. Free Hip Type. The free hip type means free hip and only the hip is free. That is, the right knee behaves stiffly. The stiff knee supports weight. As long as hip mobility has proprioception (position sense) then the motion may be useful. If not, the motion may translate into instability. The good side needs to know where the opposite foot will be - either by feel or by reliability (as with a peg leg). Free hip + stiff knee cases suggest better more energy efficient walking – a trap. Despite all the many determinants of gait that have been discussed, in this group the only factor that works, or not, is flexion of the involved side knee BEFORE the leg [thigh] swings. That is type 1 ( and also type 2B ).