I have had numbness and tingling from knees to feet and elbows to finger tips. I am now experiencing discomfort in sciatic nerve. I feel I tingly sensation down the nerve to my foot and then toes splay apart. I have had all blood work and everything checks ok. I have had cervical and lumbar MRI and both are normal. I am also experiencing weakness in my legs. Especially when climbing stairs. My arms show no weakness. I also have no deep tendon reflexes in legs. Any help would be appreciated! I am scheduled for EMG in march also.