Deconstructing Post Stroke Hemiparesis

Inclusion Criteria:

* Diagnosis of a unilateral ischemic stroke occurring \>6 months prior as documented in medical chart
* Upper extremity motor impairment as measured by Fugl-Meyer Upper Extremity Assessment ≤60
* Ability to follow simple instructions in English

Exclusion Criteria:

* Greater than moderate difficulty using the arm and hand pre-dating the stroke as assessed by the questions adapted from the QuickDASH outcome measure score on any question \>= 3, which measures physical function and symptoms in people with difficulty using the arm and hand.
* Visual or auditory disorders resulting in the inability to see or hear, respectively, the stimuli presented as part of research sessions
* Inability to maintain a seated position for at least one hour
* Standard MRI exclusion (e.g., significant claustrophobia or inability to tolerate loud noises, cardiac pacemaker (unless MRI-safe), implanted device (deep brain stimulation) or metal in the brain, cervical spinal cord, or upper thoracic spinal cord)
* Standard (single-pulse) TMS exclusion which include (in addition to those listed for MRI) pregnancy/lactation/planning to become pregnant during the study, seizure disorder, and primary or secondary CNS tumors