Table 2. [Neonatal EEG Background Evolution in Different Behavioral States*]. - Electroencephalography (EEG): An Introductory Text and Atlas of Normal and Abnormal Findings in Adults, Children, and Infants

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Britton JW, Frey LC, Hopp JLet al., authors; St. Louis EK, Frey LC, editors. Electroencephalography (EEG): An Introductory Text and Atlas of Normal and Abnormal Findings in Adults, Children, and Infants [Internet]. Chicago: American Epilepsy Society; 2016.

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Electroencephalography (EEG): An Introductory Text and Atlas of Normal and Abnormal Findings in Adults, Children, and Infants [Internet].

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Table 2.

Neonatal EEG Background Evolution in Different Behavioral States^*

: *This table shows the background evolution of different states in neonates with CA 24 to 46 weeks. Between CA 24 and 29 weeks, the EEG looks very similar in the different states, and there is no reactivity on stimulation, the EEG is discontinuous but synchronous and in the IBI are between 6 and 12 seconds with amplitude <2 μV. Between CA 30 and 34 weeks, the EEG has longer periods of continuity but is still discontinuous and becomes somewhat reactive with stimulation. The EEG looks similar during awake and active sleep. Quiet sleep is characterized by periods of discontinuity that are known as tracé discontinu. EEG is synchronous in around 70 to 80 percent of the recording. From this age onward, the IBI intervals will become progressively shorter, and the amplitude of the IBI will progressively increase until the EEG becomes completely continuous around 44 weeks CA. Between CA 35 and 36 weeks, there is clear distinction between awake and active sleep states. The EEG is more continuous in both states (activité moyenne) but remains discontinuous during quiet sleep (tracé alternant owing to alternating periods of high-voltage burst intervals and low-amplitude IBI). EEG is clearly reactive with voltage flattening and increases continuity with stimulation during quiet sleep. EEG is more synchronous (~85%). Between 37 and 40 weeks CA, the EEG is continuous and similar during awake and active sleep states. During quiet sleep, there is tracé alternant with some periods of continuous slow wave sleep. EEG is completely synchronous and reactive to internal or external stimuli. Between CA 40 and 44 weeks, the EEG is continuous during the awake, active sleep and continuous slow wave sleep portion of quiet sleep. EEG is reactive in all states and synchronous. Between CA 44 and 46 weeks, the EEG is continuous in all states. There is continuous slow wave sleep that replaces tracé alternant. Spindles appear in the central regions with a frequency of 12 to 14 Hz. Stimulation during continuous slow wave sleep produces relative attenuation of the EEG. (Adapted with permission from Ebersole and Pedley's Current Practice of Clinical Electroencephalography, Figure 6.23).³⁷

From: The Developmental EEG: Premature, Neonatal, Infant, and Children

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Britton JW, Frey LC, Hopp JLet al., authors; St. Louis EK, Frey LC, editors. Electroencephalography (EEG): An Introductory Text and Atlas of Normal and Abnormal Findings in Adults, Children, and Infants [Internet]. Chicago: American Epilepsy Society; 2016. Table 2. [Neonatal EEG Background Evolution in Different Behavioral States*].
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