Techniques used will include longitudinal rating of motor function, neuro-imaging with positron emission tomography (PET) and functional magnetic resonance tomography (fMRI), electroencephalography (EEG) and transcranial magnetic stimulation (TMS). Patients will be assigned to one of the two groups: amph linked with PT, and placebo linked with PT. Every patient will receive the standard of care PT. Motor recovery will be evaluated in the two groups. If motor recovery is accelerated in any of the groups, then neuroimaging and neurophysiological data will allow identification of areas and networks in the brain associated with this recovery.