Targeted Noninvasive Brain Stimulation to Improve Hand Dexterity in Stroke Patients

Inclusion Criteria: * Aged between 18-75 years * Clinically diagnosed with hemiparetic stroke (weakness on one side - either left or right side of the body) * Have had a stroke for more than 6 months * Have weakness in moving the fingers of the affected hand * Able to understand and perform the instructions that are part of the tDCS-MusicGlove testing and intervention. * Willing and able to participate in and travel to Kessler Foundation for the screening session, MRI session, and tDCS-MusicGlove sessions. * Able to sit and be active for 1.5 hours during the session without cardiac, respiratory and/or pain disturbances as assessed during the screening visit. * Able to provide informed consent. * Medically stable and not planning for a major change in medications for at least 4 weeks Exclusion Criteria: * Unable to move the hand because of muscle stiffness (scoring 3 or more on the Ashworth scale) * Have lost the sensation of hand movement * Have a history of alcohol abuse and/or illicit drug use * Have a history of smoking within the past 5 years * Have a problem with the eyesight that would make it difficult to notice the changing instructions on a computer screen * Currently enrolled in another research study that might affect this research study * A history of epilepsy (including family members who are diagnosed with epilepsy) * An active history of migraine or chronic headache * A history of mental illness (e.g. schizophrenia, anxiety, depression, and PTSD) * Past or current history of treated ringing in the ears known as tinnitus or severe hearing problems * Have a tattoo with metal-based ink in the head or neck. * Have severe skin damage on the scalp * Afraid of confined spaces (claustrophobic) * Have metallic implants, including intracranial electrodes, surgical clips, shrapnel or a pacemaker. * Currently taking medications that increase the risk of seizures * Pregnant