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10-20

10-20

Example of normal EEG from EdEEG

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Example of normal EEG

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(LORETA)

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LORETA

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- Top - ERDs are computed for a healthy adult subject performing a two stimulus GO/NOGO task. Pairs of visual images of animals and plants in different combinations are presented with the task to press a button in response to two animals. Note a left-side mu-rhythm desynchronization accompanied by ERS at the right side during preparation to make a movement. Bottom ERS are computed for the same subject performing an auditory oddball task. Strong ERD are observed to movements in response to targets. Note the desynchronization in one area is accompanied by an opponent reaction synchronization in the adjacent area

Top spectra (for eyes open and eyes closed conditions) and spectra map (for eyes closed condition) of EEG recorded in a patient with the right parietal lobe stroke. Bottom asymmetry map for eyes closed condition

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Example of abnormal EEG

ADHD spindling beta

Averaged data from a group of 13-14 years old healthy subjects. Top superimposed EEG power spectra computed in the mathematical (difficult) and two stimulus GO/NOGO (easy) tasks in comparison to the eyes open condition. Middle difference spectra with vertical bars (p