An ambulatory EEG report describes the electrical activity recorded from your scalp over several days and says whether anything abnormal appeared. The three findings that matter most are whether any events you noted lined up with electrical change, whether there were abnormal discharges between events, and whether the background rhythm was normal.
An ambulatory EEG report describes the electrical activity recorded from your scalp over several days and says whether anything abnormal appeared. The three findings that matter most are whether any events you noted lined up with electrical change, whether there were abnormal discharges between events, and whether the background rhythm was normal.
An ambulatory EEG is ordered to answer a specific question, usually whether particular episodes are seizures. So the first thing to look for is correlation: when you pressed the event button or wrote in the diary, was there a matching electrical change? A recorded episode with no electrical change is a genuinely useful result, because it argues the episodes are something other than seizures.
Interictal discharges are abnormal patterns occurring between events and can support a diagnosis of epilepsy even when no seizure was captured. The background rhythm describes ordinary activity and is reported as normal, slowed or asymmetric. Artifact refers to electrical noise from muscle movement, chewing or a loose electrode; a report noting artifact is not a failed study.
A normal ambulatory EEG does not rule out epilepsy. It means nothing abnormal appeared during that recording window. Whether that is reassuring or inconclusive depends on how often your episodes occur and what the clinical picture already suggests, which is why the report is interpreted alongside your history rather than read in isolation. If episodes happen monthly, a few days of recording was always unlikely to catch one, and that limitation is understood before the study is ordered rather than discovered afterwards. The next step might be a longer recording, a different question, or simply watching how things develop.
Clinical Neurology Specialists has been physician-owned since 1998, when Leo Germin, M.D., FAANEM founded it. Five board-certified neurologists and four advanced practice providers see patients at the Las Vegas and Henderson offices, each with its own AANEM-accredited electrodiagnostic laboratory.
Clinical Neurology Specialists is an adult outpatient neurology practice for patients 18 and older. The practice performs no surgery and operates no imaging suite, infusion suite or interventional pain programme, and provides no emergency or inpatient care.
Physician-reviewed. Reviewed by the physicians of Clinical Neurology Specialists — board-certified neurologists, AANEM-accredited electrodiagnostic laboratories, physician-owned since 1998. Reviewed 1 August 2026. This article is general education for adults 18 and older and is not a substitute for a consultation.
Sources and further reading: MedlinePlus: electroencephalogram (EEG); MedlinePlus: epilepsy; American Academy of Neurology.
Adults 18 and older, at the Las Vegas and Henderson offices. Call 702-804-1212 or request an appointment online.