Spatial-Motor Stroke-Rehab Study

Inclusion Criteria: Young Adults Able Bodied (YAB) Individuals * 18-30 years * Able-Bodied (healthy without any physical disability or neurological disorder) Older Adults Able-Bodied Individuals (OAB) * 45-90 years * Able-Bodied (healthy without any physical disability or neurological disorder) Individuals with right hemisphere stroke (40-90 years) * \>3 months following stroke. * Presence of Aiming SN * Ability to walk \>10m with or without assistive devices. * Unilateral left-sided hemiparesis with gross arm strength of ≤ grade 4/5 on the Medical Research Council Scale * Ability to follow 3-stage commands and provide informed consent. Exclusion Criteria: Young Adults Able-Bodied (YAB) Individuals and Older Adults Able-Bodied Individuals (OAB) * History or evidence of orthopedic or physical disability * History or evidence of neurological pathology * Pregnancy (female) * Uncontrolled hypertension * Cardiac pacemaker or other implanted electronic system * Presence of skin conditions preventing the electrical stimulation setup * Impaired sensation in the left upper limb. * Bruises or cuts at the stimulation electrode placement site * Concurrent enrollment in rehabilitation or another investigational study. * History or evidence of orthopedic or physical disability interfering with study procedures * History or evidence of neurological pathology or disorder * Severe uncontrolled medical problems (e.g., hypertension, cardiovascular disease, rheumatoid arthritis, active cancer or renal disease, epilepsy) that may interfere with study procedures * Contraindications to TMS, such as metal implants, medications that can increase cortical excitability, and unexplained dizziness in the past 6 months Individuals with right hemisphere stroke (40-90 years) * History or brainstem strokes * Cerebellar disorders * Impaired sensation in the left upper limb. * History of other neurological disorders * Uncontrolled hypertension * Cardiac pacemaker or other implanted electronic system * Pregnancy (female) * Presence of skin condition * Bruises at the electrode placement site * Severe uncontrolled medical problems (e.g., hypertension, cardiovascular disease, rheumatoid arthritis, active cancer or renal disease, epilepsy) or other medical conditions that can interfere with study procedures * Contraindications to TMS, such as metal implants in the brain, medications that will increase cortical excitability, etc.