Weak feeling limbs right arm and leg. heavy mess back dull feeling right lant back numb feeling, shin tingling feet left, right eye floaters. blather problems, quick tingling limbs fast twitching muscles walking pattern different. mri was clean?

Negative MRI does not rule out a CNS disease which can cause those symptoms. A complete medical history and some basic blood and serology tests are also required. Please follow closely with a neurologist.

The mri may have been negative, but what does the neurologist feel is the differential diagnosis and what other testing is proposed? I'd be thinking of possible deficiencies of calcium,magnesium,electrolyte imbalance, and possibly doing EMG, &/or examination of spinal fluid. A neurologist with a specialty in neuromuscular disorders may be worthwhile consulting at a university hospital near you