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Neurophysiological Studies of Specific Learning Disabilities 

Neurophysiological Studies of Specific Learning Disabilities
Chapter:
Neurophysiological Studies of Specific Learning Disabilities
Author(s):

Yitzchak Frank

DOI:
10.1093/med/9780199862955.003.0010
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date: 17 January 2020

The electroencephalogram (EEG) is a recording of brain electrical activity. The recording is done through electrodes, which are attached to the scalp in standard locations. Electrical activity is a major vehicle for the conduction of information in the nervous system. The EEG could, therefore, be used to study abnormalities of the conduction of information within the central nervous system, in people with SLD. The EEG “background activity” is the ongoing cortical electrical activity, which consists of a mixture of waves with various frequencies and voltage. Wave frequencies are in the alpha (8–12 cycles per second), beta (≥12 cycles per second), theta (4–7 cycles per second), or delta (1–4 cycles per second) range. Typically as the child grows up the EEG background activity in the awake state contains more of the faster alpha waves and less of the slower theta and delta waves.

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