Typical rhythmic electroencephalographic patterns. A. Pattern I: run of high‐amplitude delta activity mixed with spikes predominating in the anterior regions without clinical correlation. B. Pattern II: run of diffuse moderate‐amplitude theta activity (not associated with drowsiness). C. Pattern III: high amplitude delta activity mixed with spikes in the posterior regions on eye closure (indexed by the arrow). | Clayton-Smith, J., & Laan, L. (2003). Angelman syndrome: a review of the clinical and genetic aspects. Journal of Medical Genetics, 40(2), 87 LP-95. https://doi.org/10.1136/jmg.40.2.87

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