Quick Answer
Ambulatory EEG records brain electrical activity over days rather than minutes, raising the chance of capturing an actual event. It requires two appointments, setup and removal, at 1691 W. Horizon Ridge Parkway, Suite 100, Henderson NV 89012, and the event diary you keep is half the study.
Part ofThis guide sits beneath ambulatory eeg, which covers the study itself, how it is performed and what the report should contain.
Ambulatory EEG Monitoring at CNS →Key Takeaways
- Two appointments: setup to apply sensors and connect the recorder, removal at the end.
- There is no version of this study that takes one journey.
- You cannot wash your hair during the monitoring period, which is the part patients find hardest.
- Avoid swimming, bathing and heavy sweating, and sleep normally since capturing sleep is part of the point.
- Both visits are at the same office. This one is 1691 W. Horizon Ridge Parkway, Suite 100, Henderson NV 89012.
Ambulatory EEG
Ambulatory EEG is multi-day electroencephalography recorded while you go about ordinary life at home. Because it records for far longer than a routine study, it is more likely to capture infrequent events.
Why a longer window changes the answer
A routine EEG samples twenty to forty minutes. Where events occur weekly or monthly, the chance of one appearing in that window is small, and a normal result tells you almost nothing you did not already know.
The arithmetic of the window
Ambulatory monitoring extends the recording to days rather than minutes, which raises the chance of capturing an actual event by orders of magnitude. That is the entire rationale, and it is why the study exists rather than simply repeating a short recording. It also captures sleep across whole nights, which matters because abnormal activity frequently appears in sleep and a brief daytime recording may miss it entirely.
The diary is half the study
You keep a written record of events, symptoms, sleep and activities with times. That is not administrative: the recording alone shows electrical activity, and the diary is what connects a pattern on the trace to something you actually experienced. An event felt but not recorded, and a recorded change with no symptom, are both informative and both depend on the diary being kept properly. A study returned without one is substantially less useful.
What it can settle that a short recording cannot
Whether episodes are seizures at all, which is frequently the real question. Faints, cardiac events, sleep phenomena and non-epileptic attacks all produce episodes resembling seizures, and capturing one on a recording alongside a diary entry is the strongest available evidence either way. That distinction matters enormously, because it determines whether someone takes anti-seizure medication for years.
| Also considered | How it is distinguished |
|---|---|
| Routine EEG | A short in-office recording; useful but can miss events that occur days apart. |
| Video-EEG in hospital | Used where events are frequent or classification needs continuous observation. |
| Cardiac monitoring | Chosen where the history points to fainting rather than seizure. |
| Sleep study | Where the question is a primary sleep disorder rather than epileptic activity. |
The two visits, and living with the recorder
01
What brings people in
Episodes too infrequent for a routine EEG to capture, or a routine study that was normal while events continued.
02
What the evaluation settles
Whether recorded events are epileptic, how often they occur, and what pattern they follow across ordinary days and nights.
03
What you leave with
A multi-day interpreted recording, correlated with the event diary you keep during the study.
Two appointments, which cannot be combined
A setup visit to apply and secure the sensors and connect the recorder, and a removal visit at the end. There is no version of this study that takes one journey, and knowing that before you plan time off matters. Both visits are at the same office, and both offices provide the study.
The hair instruction, which matters more here
Wash your hair beforehand and use nothing afterwards: no conditioner, oil, gel, spray or dry shampoo. Sensors must stay attached for days rather than minutes, so contact quality determines whether the recording is usable across the whole period. Plan around not washing your hair until removal, which is the part patients find hardest and is worth knowing in advance.
Ordinary life, with limits
You go home and continue normally. The recorder is small and carried or worn. Avoid swimming, bathing and heavy sweating, and follow the specific guidance given at setup. Sleep normally, since capturing sleep is part of the point. If a sensor comes loose, there is guidance on what to do rather than abandoning the study.
Who interprets it
A neurologist with fellowship training in epilepsy, within the practice, reading the recording alongside your diary. That combination is what makes the study worth doing, because a multi-day trace read without the diary loses much of what it captured.
The first 30, 60 and 90 days
Step 1
First visit
History and neurological examination, a review of records and prior imaging, and a decision on which studies are actually indicated. You leave with the plan, not just a referral.
Step 2
Within 30 days
Indicated in-office studies are performed and interpreted by the neurologist who ordered them, in our AANEM-accredited laboratories. Results are explained in plain language.
Step 3
60 to 90 days
Follow-up to judge whether the plan is working, adjust it, and coordinate with your referring clinician. Where a diagnosis needs time to confirm, this is where it is revisited.
Attending from Henderson
The Henderson office is at 1691 W. Horizon Ridge Parkway, Suite 100, just off the 215 Beltway, with parking on site. All six in-office studies are performed and interpreted there, so nothing is sent across to Las Vegas. Green Valley, Anthem, Whitney and Boulder City are generally closer to it than to Flamingo Road. Adults 18 and older.
Referred for ambulatory monitoring?
Book both visits before you start, and plan around not washing your hair in between.
The Bottom Line
Two visits, no exceptions, and no hair washing in between. Plan time off around both rather than one.
Frequently Asked Questions
Why not just repeat a routine EEG?
Because a routine recording samples twenty to forty minutes, and where events occur weekly or monthly the chance of capturing one in that window is small. Extending to days raises it by orders of magnitude, and it captures whole nights of sleep, when abnormal activity frequently appears. The trade-off is the inconvenience of days with sensors attached.
How many appointments does it take?
Two, and they cannot be combined. A setup visit to apply the sensors and connect the recorder, and a removal visit at the end. There is no version of this study that takes one journey, which matters when planning time off. Both visits happen at the same office, so factor in two round trips.
Can I wash my hair during the monitoring?
No, and that is the part most patients find hardest. Sensors must stay attached for days, so contact quality determines whether the recording is usable across the whole period. Wash beforehand, use nothing afterwards, and plan around it until removal. Dry shampoo is not a substitute and will degrade the recording.
How important is the diary?
It is half the study. The recording shows electrical activity; the diary connects a pattern on the trace to something you actually experienced. An event felt but not recorded, and a recorded change with no symptom, are both informative and both depend on the diary. Note times as they happen rather than reconstructing them at the end.
Can I go about normal life?
Largely yes. You go home and continue normally with the recorder carried or worn. Avoid swimming, bathing and heavy sweating, and sleep normally, since capturing sleep is part of the point. Work, driving and ordinary routine continue unless you have been told otherwise, and keeping to your usual pattern makes the recording more representative.
What if it captures nothing?
That is the least useful outcome, which is why the monitoring period is set against how often your events occur. Capturing an event with no electrical change is more useful, because it suggests the episodes are not seizures and redirects the assessment. Where nothing at all is captured, the period can be extended or the study repeated.
Can the two visits be combined?
No. Setup and removal are separate by definition, since the recording happens in between. There is no version of this study that takes one journey. Plan two separate trips at the point you book, and allow for the setup visit taking rather longer than the removal appointment, which is usually fairly brief.
Where exactly is the Henderson office?
1691 W. Horizon Ridge Parkway, Suite 100, Henderson NV 89012, just off the 215 Beltway, with parking on site. All six in-office studies are performed and interpreted there, so nothing is referred across to the Las Vegas office. Green Valley, Anthem, Whitney and Boulder City are generally closer to it than to West Flamingo Road.
Should I use the Henderson or the Las Vegas office?
Whichever is the shorter drive, since both are fully equipped and hold the same records. West Horizon Ridge Parkway generally suits Green Valley, Anthem and Boulder City; West Flamingo Road suits the west and southwest of the valley. If you can attend either, say so when booking, because availability differs between the two week to week.
Can the recorder be removed early if I capture an event?
Raise it rather than deciding alone, because a single captured event is sometimes enough and sometimes not, depending on what question the study was set to answer. Removing sensors yourself ends the recording and cannot be undone, so it is worth a phone call first. The diary matters as much as the recording itself.
How this page was sourced
Practice facts come from Clinical Neurology Specialists directly: that the study is provided at both offices, that it requires separate setup and removal visits, and that interpretation stays within the practice with fellowship training in epilepsy. Clinical context is sourced to the organisations listed below.
No detection rates, capture probabilities or monitoring durations are quoted as figures, because the appropriate period depends on how often an individual patient’s events occur. Nevada driving requirements are referred to rather than quoted. No outcome is promised. Scope is adults 18 and older.
Change log
- 2026-07-28 — page published; clinical content reviewed.
- 2026-07-28 — last reviewed against AAN, AANEM and NINDS guidance; internal links and schema verified.
- Review cadence: quarterly, or sooner if guidance changes.
How to cite this page
Clinical Neurology Specialists. “Ambulatory EEG Henderson.” Reviewed 2026-07-28. https://www.cnsnevada.com/diagnostic-testing/ambulatory-eeg/ambulatory-eeg-henderson/
References
- American Epilepsy Society — clinical guidance on epilepsy and electroencephalography.
- National Institute of Neurological Disorders and Stroke — the reference catalogue of nervous-system disorders.
- American Academy of Neurology — practice guidance and specialist supply.
This page is for general information about a Clinical Neurology Specialists office and is not medical advice, a diagnosis, or a treatment recommendation. It does not create a physician-patient relationship. Adults 18 and older. For an active stroke, a first-time or prolonged seizure, sudden severe headache, sudden weakness, sudden vision loss, or a head injury with loss of consciousness, call 911 or go to the nearest emergency department.