Electroencephalography
hideElectroencephalography (EEG) is the recording of electrical activity along the scalp produced by the firing of neurons within the brain. In clinical contexts, EEG refers to the recording of the brain's spontaneous electrical activity over a short period of time, usually 20–40 minutes, as recorded from multiple electrodes placed on the scalp. In neurology, the main diagnostic application of EEG is in the case of epilepsy, as epileptic activity can create clear abnormalities on a standard EEG study. A secondary clinical use of EEG is in the diagnosis of coma and encephalopathies. EEG used to be a first-line method for the diagnosis of tumors, stroke and other focal brain disorders, but this use has decreased with the advent of anatomical imaging techniques such as MRI and CT.
Derivatives of the EEG technique include evoked potentials (EP), which involves averaging the EEG activity time-locked to the presentation of a stimulus of some sort (visual, somatosensory, or auditory). Event-related potentials refer to averaged EEG responses that are time-locked to more complex processing of stimuli; this technique is used in cognitive science, cognitive psychology, and psychophysiological research.
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News tagged with electroencephalography
Dutch researchers explore advanced brain diagnostic techniques
Medicine & Health / Neuroscience
13 hours ago |
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At present the task of diagnosing brain disorders using electroencephalography (EEG) is still performed by humans, but in years to come it will increasingly be taken over by computerized systems. This will ...
Researchers show brain waves can 'write' on a computer in early tests
Dec 07, 2009 |
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Neuroscientists at the Mayo Clinic campus in Jacksonville, Fla., have demonstrated how brain waves can be used to type alphanumerical characters on a computer screen. By merely focusing on the "q" in a matrix of letters, ...
Sleep loss linked to increase in Alzheimer's plaques
Sep 24, 2009 |
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Chronic sleep deprivation in a mouse model of Alzheimer's disease makes Alzheimer's brain plaques appear earlier and more often, researchers at Washington University School of Medicine in St. Louis report online this week ...
Researchers develop biomarker for rapid relief of major depression
Medicine & Health / Psychology & Psychiatry
Sep 10, 2009 |
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(PhysOrg.com) -- It is a long, slow slog to treat major depression. Many antidepressant medications are available, but no single biomarker or diagnostic test exists to predict which one is right for an individual. As a result, ...
Hush little baby... Linking genes, brain and behavior in children
Medicine & Health / Psychology & Psychiatry
Jul 13, 2009 |
4.5 / 5 (2) |
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It comes as no surprise that some babies are more difficult to soothe than others but frustrated parents may be relieved to know that this is not necessarily an indication of their parenting skills. According to a new report ...
Translate this: 'cognition-strength interfaces'
Jul 06, 2009 |
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(PhysOrg.com) -- A highly ambitious European project used basic cognitive function, eye-tracking and keystroke logging as the starting point for the study of human-computer interaction for translation. It ...
Brain wave patterns can predict blunders, new study finds
Mar 23, 2009 |
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From spilling a cup of coffee to failing to notice a stop sign, everyone makes an occasional error due to lack of attention. Now a team led by a researcher at the University of California, Davis, in collaboration ...
Research team developing new noninvasive brain-mapping technology
Mar 09, 2009 |
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Two Japanese scientists will arrive at the University of Houston next month to help develop a unique brain-mapping device that promises to deliver more comprehensive and accurate insights into the mind at a fraction of the ...
