Epilepsy Seizure Detection With Innovative Tripolar EEG (tEEG)

Inclusion Criteria: * Pediatric (BCH): Age ≥ 6 years and \< 18 years * Adult (BNI): Age ≥ 18 years * Able to provide written informed consent or have a legally authorized representative able to provide consent; pediatric patients to provide assent when appropriate * Scheduled for routine outpatient EEG for clinical diagnosis * Able to participate in a post-EEG telemedicine video visit * Clinical diagnosis of epilepsy with epileptiform discharges on prior routine EEG * Scheduled for inpatient video-EEG monitoring for clinical diagnosis * MRI of brain available for co-registration * Confirmed diagnosis of focal epilepsy by prior video-EEG monitoring interpreted by board-certified epileptologist or clinical neurophysiologist * Scheduled for inpatient video-EEG monitoring with intracranial stereo-EEG electrodes for epilepsy presurgical evaluation * MRI of brain available for co-registration Exclusion criteria * Presence of a condition or abnormality that in the opinion of the Investigator would compromise the safety of the subject or the integrity of the data * Any clinical suspicion of prion disease * History of allergy or adverse reaction to EEG electrode paste or gel * Scalp lesions or infections * Severe intellectual disability or behavioral disorders with inability to cooperate with EEG application or recording