SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY SOVEREIGN, ISM / SCIENCE PHOTO LIBRARY
Brain waves in epilepsy. Electroencephalogram (EEG) of a 27-month-old baby boy's brain during an epileptic episode (chaotic brain activity). This EEG shows generalized epilepsy, where the whole brain cortex is affected: all the EEG traces show chaotic brain waves. Epilepsy can take many forms, and have different effects. This is both benign epilepsy, an inherited childhood form of epilepsy that normally improves with age, and myoclonic epilepsy, a term referring to the symptoms of muscle contractions. An EEG measures electrical activity in the brain (brain waves) using electrodes attached to the scalp (electrode locations labelled at far left).
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