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Stage I : spastic gait with no need to use a walking stick and no Babinski sign.

Stage II: spastic gait with the need of one walking stick. Ankle clonus and Babinski sign present.

Stage III: Spastic cross adductor gait with the need of two walking sticks. Ankle clonus and Babinsi sign present.

Stage IV: There is bed ridden (wheel chair) state with loss of leg use and contracture. Arms are strong and pyramidal signs present.