Non-invasive BCI-controlled Assistive Devices

Inclusion Criteria: 1. Able-bodied participants: * good general health * normal or corrected vision * no history of neurological/psychiatric disease * ability to read and understand English (Research Personnel do not speak Spanish) 2. Subjects with motor disabilities * motor deficits due to: unilateral and bilateral stroke / spinal cord injury / motor neuron diseases (i.e. amyotrophic lateral sclerosis, spino-cerebellar ataxia, multiple sclerosis) / muscular diseases (i.e. myopathy) / traumatic or neurological pain / movement disorders (i.e. cerebral palsy) / orthopedic / traumatic brain injury / brain tumors * normal or corrected vision * ability to read and understand English * ability to provide informed consent Exclusion Criteria: 1. Subjects with motor disabilities * short attentional spans or cognitive deficits that prevent the subject from concentrating during the whole experimental session * heavy medication affecting the central nervous system (including vigilance) * concomitant serious illness (e.g., metabolic disorders) 2. All participants * factors hindering EEG/EMG acquisition and the delivery of non-invasive electrical stimulation (e.g., skin infection, wounds, dermatitis, metal implants under electrodes) * criteria identified in safety guidelines for MRI and TMS, in particular metallic implants