Normal alpha brain waves. Series of 8 coloured scans showing one person's normal alpha brain wave pattern,recorded by electro- encephalography (EEG). An EEG records the level of electrical activity in different regions of the brain. Red & violet colours represent increased alpha wave activity,whilst blue indicates its total absence. The subject's eyes are closed in the upper row,& open in the lower. Alpha activity is the most conspicuous & fundamental of EEG brain waves. Alpha rhythms are affected by age,drugs,sleep,mental activity & sensory stimuli. EEG data is used to assess brain disorders such as Alzheimer's disease & epilepsy | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Pouedras, Catherine |
Bildgröße: | 5307 px × 3461 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
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