High Density EEG Testing

A Better EEG for the 21st Century

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At CNNH, we are proud to provide the latest in non-invasive EEG technology: High Density Electroencephalography (HD-EEG) using the Geodesic® EEG System 250 from Electrical Geodesics, Inc. (EGI). HD-EEG is an improvement on conventional approaches to EEG, as it uses a much larger number of sensors (small saline soaked sponges that record the electrical brain activity) for superior accuracy and detection of abnormalities. Typical EEG systems use between 18-24 sensors where as our system uses 128 sensors for whole head coverage and a detailed, 3-dimensional picture of brain activity.

Quick and Painless Application

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EGI has devised an ingenuous way to apply the large number of sensors (128 in our system) by devising a “net” that can apply the sponge electrodes in minutes. The application is quick and painless, reduces patient anxiety about the test and, therefore, increases compliance. Additionally, the net application does not require the need for sedation, and since there is no abrasion of the scalp, and no gluing, as is typical with conventional EEG’s, risk of infection is reduced. The quick application time allows for longer recording sessions and better data collection.

Happy Patients – Better Data

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Our HD-EEG technicians have specialized training and experience in the use of dense array apparatus, and strive to create a comfortable, soothing experience for our patients without the need for sedation. Comfortable chairs and TV/Video Games are provided to keep patients occupied. In extreme cases, our behavior therapists are available to assist our HD-EEG technicians in calming down distressed patients. Since even the most sensitive patients handle the testing well, the resulting data is more reliable for our doctors than conventional EEG systems.

Sensitive Detection of Brain Activity

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HD-EEG is a useful clinical tool in our office for the detection of electrical abnormalities associated with seizure activity (i.e. Epilepsy) but can also be useful for detecting “subclinical” low-level brain activity that might be contributing to many other disorders. This low level “subclinical” activity was not previously detectable with conventional EEG, and allows our clinicians to make nuanced and sometimes life-changing diagnoses… diagnoses that would have not been possible before the advent of High Density EEG technology.

128+ Sensor Whole Head Coverage

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128+ sensor “whole head” coverage allows us to localize the source of abnormal electrical brain activity for a detailed 3-dimensional image. By localizing the electrical sources in 3D, our data can later be mapped onto MRI’s as well as used in pre-surgical planning and overall patient management.

Useful for Many Different Disorders

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HD-EEG testing can be a useful tool in evaluating:
Epilepsy/Seizures,
Autism Spectrum Disorders,
ADHD,
Brain Injury
,
Neuropsychiatric disorders and more…

Because HD-EEG testing can detect very low-level brain activity, any subtle abnormalities detected can give our doctors insights into a wide range of disorders, not just limited to seizure activity.

The High Density Difference at CNNH

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HD-EEG is a way to electrically “image” the brain, as the sensor data is run through a powerful computer that allows the location of abnormal brain activity to be determined with great accuracy. This data can then be mapped directly onto an MRI. High Density EEG (previously known as dense array EEG) is widely used for research applications investigating aspects of brain function and mind control, and has been featured on the cover of National Geographic and Newsweek. However, CNNH is the one of the leading clinical providers in the nation that recognizes the value of this technology in the clinical realm to help our doctors make more accurate and thorough diagnoses.

Read More about how CNNH is a leading provider of High Density EEG…

Testing Available by Referral

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Anyone can get HD-EEG testing done at CNNH, you do not have to be a CNNH patient in order to schedule an HD-EEG test. We often get referrals from other doctors to perform HD-EEG testing on their patients as our testing service is unique and invaluable.

It didn’t take the CNNH team long to find out that Leo has a form of epilepsy… It’s difficult, but at least we know what it is and how to treat it, thanks to everybody at CNNH!

— Sue

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