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United States Department of Agriculture

Agricultural Research Service

Title: Electroencephalogram

Author
item Cheng, Heng Wei

Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: May 27, 2004
Publication Date: N/A

Technical Abstract: Electroencephalogram (EEG) is a noninvasive and painless test that detects electrical impulses (activity) in the brain. Brain activity is displayed as different kinds of waves traced on graph paper. EEG waves vary dramatically and often correlate with particular states of behavior, such as the level of attentiveness, sleeping, waking, and pathological changes, which include seizures or coma. In particular, EEG has been used in examining the structure and functional states of the brain in both health and psychiatric illness, such as, anxiety, mood disorders, and post-traumatic stress disorder. When an animal is sick, hurt, or stressed, electrical messages to and from the brain can be changed or blocked, resulting in changes in EEG waves. In addition, a high resolution EEG structure analysis has been used to assess a stress-induced state and its correlations with the resonance activation of the brain.

Last Modified: 7/24/2014
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