What is an at-home EEG sleep study?

Electroencephalography (EEG) is one of the most valuable tools in your toolbelt when it comes to diagnosing sleep apnea. EEG tests are unique in that they monitor electrical activity in the brain. Your brain is always active, even when you’re asleep, and some of your most important neurological functions are carried out while you’re counting sheep. That’s why EEGs are so useful in identifying sleep disorders. 

EEGs are traditionally performed as part of an in-lab polysomnography (PSG), where electrodes are placed on the scalp to monitor brain activity alongside other important metrics like airflow. However, PSGs can be costly and invasive, but thanks to modern technology, you can benefit from Electroencephalography in the comfort of your own home. So, how does an at-home EEG sleep study work, and more importantly, are they reliable?

How does a home EEG work?

An at-home EEG sleep study, also known as an ambulatory EEG, consists of a portable and wearable electroencephalograph device. Rather than having a technician place each electrode in a lab, ambulatory EEGs are normally more like hats, headbands, or even earpieces with sensors attached, but they do the same thing. 

While you may not have the clinical setting of an overnight PSG, there are also some benefits to doing it at home. Aside from convenience, at-home testing also allows you to wear the device for longer than you would during an overnight sleep test, up to 24 hours or more. This extra time can provide more comprehensive results compared to a shorter clinical test.

As for their reliability, ambulatory EEGs were 95% accurate when compared to clinical PSGs.

Wondering if sleep apnea is affecting you? Buy our At-Home Sleep Study.  It is a simple, one night test designed to measure key signals related to obstructive sleep apnea, or OSA 

What do they measure?

Electroencephalography monitors the energy generated by neurons in your brain. By analyzing this energy, it can detect:

• Sleep stages: Awake, light (N1), intermediate (N2), deep (N3), and REM sleep.
  
  
• Arousals and awakenings: Subtle shifts in brainwave patterns that indicate disrupted sleep.
  
  
• Sleep efficiency: The ratio of time spent asleep to total time in bed.

• Sleep apnea severity: When paired with other devices like an oximeter, EEGs have even been shown to estimate the severity of apneas, on par with PSGs.

Frequently Asked Questions

Is a home EEG study comfortable to wear overnight?
Most home EEG devices are designed for comfort, using flexible headbands or lightweight earpieces. While they may feel unusual at first, most patients adapt quickly and can sleep through the night with them.

Can a home EEG detect seizures as well as sleep stages?
Some systems are sensitive enough to capture abnormal brain activity, but seizure monitoring usually requires more electrodes and hospital-grade equipment. Home EEG can sometimes be used for follow-up monitoring, but it’s not a substitute for inpatient epilepsy studies.

How many nights should a home EEG be worn?
Clinicians often recommend multiple nights, since sleep can vary from one night to another. Multi-night recordings help reduce the chance of false negatives or misleading results.

Do insurance plans cover home EEG studies?
Coverage varies by country and insurer. In the U.S., some providers cover home EEG for specific indications, but policies are less standardized than those for home sleep apnea testing.

Who reviews the results of a home EEG study?
The data is usually uploaded to a secure platform and interpreted by a neurologist or sleep specialist. Automated scoring algorithms assist, but human review is essential for accuracy.

Wondering if sleep apnea is affecting you? Buy our At-Home Sleep Study.  It is a simple, one night test designed to measure key signals related to obstructive sleep apnea, or OSA