Evaluate patient motion during seizures.

Inclusion Criteria:

• 18 years of age or older
• Diagnosed with epilepsy and expected to have at least one motor seizure in the EMU
• Determined by the Investigator to be an acceptable candidate for epilepsy evaluation with intracranial or scalp electrode monitoring
• Willing and able to wear 3 ActiGraph GT3X+ devices for the duration of their participation in the study and comply with the study protocol
• Have one of the following seizure types: (a) partial seizures with secondary generalization, which results in visible clonic or tonic-clonic motor behavior; (b) primarily generalized seizures (in patients with either primary [idiopathic] or secondary [symptomatic] generalized epilepsy), which may involve the following depending on the motor manifestation observed: myoclonic seizures, clonic seizures, tonic-clonic seizures, or atonic seizures.
• Be able to consent to participate by signing the Informed Consent document after a full explanation of the nature and purpose of this study
• Male or non-pregnant female
• English speaking

Exclusion Criteria:

• Currently enrolled in another investigational device, drug, or surgery study. Concurrent physiologic study participation is acceptable
• Have an implanted device that may interfere with GT3X+ recordings, ECoG/EEG recordings, ECG recordings, or video recordings
• Have a movement disorder that may affect GT3X+ recordings

Patients with epilepsy referred to epilepsy monitoring unit.