Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision | ||
content:normal_eeg_in_children [2020/02/17 19:19] – [Normal Drowsiness, Sleep, Arousal] icna | content:normal_eeg_in_children [2020/02/23 17:28] (current) – [Introduction] icna | ||
---|---|---|---|
Line 1: | Line 1: | ||
====== Normal EEG in children ====== | ====== Normal EEG in children ====== | ||
- | ===== Introduction ===== | ||
The electroencephalograms (EEGs) of infants and children are normally characterized by a greater mixture of waveforms and frequencies than is found in adults.The relative predominance of these wave types varies with age. There may be considerable intersubject variability, | The electroencephalograms (EEGs) of infants and children are normally characterized by a greater mixture of waveforms and frequencies than is found in adults.The relative predominance of these wave types varies with age. There may be considerable intersubject variability, | ||
Several waveforms, such as the initial response to hyperventilation and posterior slow rhythms of youth, may be normally asymmetrical. | Several waveforms, such as the initial response to hyperventilation and posterior slow rhythms of youth, may be normally asymmetrical. | ||
+ | |||
Moreover, infants and young children tend to become drowsy during the recording, and the electrographic alterations with drowsiness are greater than those with adults. These factors create wider limits of normality than might be expected in adults. In addition, the superimposition of two or more waveforms often creates sharply contoured waves that can be mistaken for spikes. Fortunately, | Moreover, infants and young children tend to become drowsy during the recording, and the electrographic alterations with drowsiness are greater than those with adults. These factors create wider limits of normality than might be expected in adults. In addition, the superimposition of two or more waveforms often creates sharply contoured waves that can be mistaken for spikes. Fortunately, | ||
==== Normal Awake ==== | ==== Normal Awake ==== | ||
Line 65: | Line 65: | ||
=== Positive Occipital Sharp Transients of Sleep (POSTS) === | === Positive Occipital Sharp Transients of Sleep (POSTS) === | ||
Also known as lambdoid waves. Monophasic. Sharply contoured. Electropositive. Bioccipital. Singly or in 4 to 5 s sequences. Occur in most normal subjects. | Also known as lambdoid waves. Monophasic. Sharply contoured. Electropositive. Bioccipital. Singly or in 4 to 5 s sequences. Occur in most normal subjects. | ||
+ | |||
< | < | ||
=== Occipital Sharply Contoured Waves and Delta === | === Occipital Sharply Contoured Waves and Delta === | ||
Line 77: | Line 78: | ||
Then 1 to 3 Hz diffuse delta. Posterior delta is independent of anterior delta and persists longer. Then delta merges with 4 to 5 Hz waves. | Then 1 to 3 Hz diffuse delta. Posterior delta is independent of anterior delta and persists longer. Then delta merges with 4 to 5 Hz waves. | ||
< | < | ||
+ | < | ||
+ | Source: | ||
+ | Authors: Blume, Warren T.; Kaibara, Masako; Holloway, Giannina M.; Young, G. Bryan. | ||
+ | Title: Blume' | ||
+ | </ | ||
+ | {{tag> |