A 9-year-old with Lennox-Gastaut syndrome showed near-complete normalization of EEG background activity and total seizure control on CBD, a more dramatic improvement than previously reported.
Pediatric neurologists, EEG specialists, and families of children with Lennox-Gastaut syndrome.
First reported near-complete EEG normalization with CBD in LGS
What the researchers found
A 9-year-old boy with Lennox-Gastaut syndrome of unknown etiology treated with highly purified CBD (Epidiolex) achieved complete seizure control and near-normalization of EEG background activity. The EEG response was described as "dramatic," with previously abnormal patterns resolving. This degree of EEG improvement has not been previously described with CBD treatment.
Why it matters
EEG normalization goes beyond seizure control: it suggests CBD may modify the underlying epileptic brain activity, not just suppress seizure expression. This could indicate disease-modifying rather than purely symptomatic effects.
The numbers in context
One 9-year-old patient; complete seizure control; near-normalization of EEG background; unknown etiology LGS.
How the study worked
Single case report with pre- and post-CBD electroencephalography documenting the electrophysiological response to cannabidiol treatment in a child with Lennox-Gastaut syndrome.
What this study cannot tell us
Single case report; cannot determine if response is typical or exceptional; EEG improvement may be coincidental with development; no control for other variables; unknown etiology means underlying cause could influence response.
How to read the evidence
Preliminary: single case report, but the dramatic EEG finding is novel and well-documented.
When this study was published
Published 2020.
The bigger picture
Most anti-seizure medications control seizures without normalizing EEG. If CBD can normalize brain wave patterns in LGS, it may suggest that early intervention with CBD could prevent the progressive EEG deterioration seen in this syndrome.
Questions still open
- Is EEG normalization a predictor of better long-term outcomes in LGS? Does earlier CBD intervention in LGS lead to more dramatic EEG improvements?
Common questions
Can CBD normalize brain waves in epilepsy?
What does EEG normalization mean?
Read the original research
Effect of Cannabinoids on Electroencephalography of a Child with Lennox-Gastaut Syndrome.
Journal of neurosciences in rural practice, 11(4), 643-645
Citation
Prakash, Vikram. (2020). Effect of Cannabinoids on Electroencephalography of a Child with Lennox-Gastaut Syndrome.. Journal of neurosciences in rural practice, 11(4), 643-645. https://doi.org/10.1055/s-0040-1714329
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