Abstract
It is important to recognize normal awake and sleep EEG patterns before starting to interpret EEGs. In a normal awake person, alpha rhythm is 8–13 Hz activity in the posterior head regions and beta at a frequency >13 Hz is seen in anterior areas. Theta (4–7 Hz) and delta (<4 Hz) are seen during drowsiness and sleep but are abnormal if seen in awake state. Lambda and POSTS (positive occipital sharp transients of sleep) are normal findings in occipital head regions. Photic stimulation and hyperventilation are routinely used in the EEG lab to provoke potential abnormal response. Photic driving response and diffuse slow activity during hyperventilation are normal findings. This chapter summarizes normal awake and sleep EEG findings in adults.
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Sazgar, M., Young, M.G. (2019). Normal EEG Awake and Sleep. In: Absolute Epilepsy and EEG Rotation Review. Springer, Cham. https://doi.org/10.1007/978-3-030-03511-2_6
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DOI: https://doi.org/10.1007/978-3-030-03511-2_6
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