Multifocal Brain Magnetic Stimulation in Chronic Ischemic Stroke

Inclusion Criteria: * Patients aged 18-80 years; * Clinical diagnosis of chronic ischemic stroke recovering for more than 3 months with unilateral motor deficits of arm and leg, or arm alone; -- Exclusion Criteria: * History of seizure; * Epileptogenic activity (indicative of increased risk of seizures) on EEG; * Any active unstable medical condition; * Pregnancy; * Schizophrenia, bipolar disorder, alcoholism, or substance abuse; * Medications which in the investigator's clinical judgment significantly lower the seizure threshold; * Presence of metal or electronic implants in the head (or any in the body that preclude MRI) , including pacemakers, defibrillators, aneurysm clips, neuro-stimulators, cochlear implants, metal in the eyes, etc.; * Any changes in medications prescribed for the treatment of stroke impairment within six weeks prior to inclusion in the study or at any time during the study. * Botulinum toxin use within two months prior to the screening visit or any planned use of botulinum toxin during the study * Changes in NIHSS and motor assessment scores between Visit 1 and Visit 2 indicating that the patient's impairment is not stable. The following cutoffs, based on research establishing Clinically Important Differences, will be used for this determination: * National Institutes of Health Stroke Scale: A change in total score of more than 2 points in either direction, or a change in the motor extremity score of more than 1 point in either direction. * Fugl-Meyer Assessment of Sensorimotor Impairment: A change of more than 5 points in either direction on the upper-extremity motor score for the affected arm. * Action Research Arm Test: A change of more than 5 points in either direction on the ARAT score for the affected arm. * Any condition that precludes a high quality brain MRI scan.