Related topics: brain
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.
For more information about Electroencephalography, read the full article at
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News tagged with brain activity
Intel wants a chip implant in your brain
Nov 23, 2009 |
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(PhysOrg.com) -- Computer chip maker Intel wants to implant a brain-sensing chip directly into the brains of its customers to allow them to operate computers and other devices without moving a muscle.
Scans show learning 'sculpts' the brain's connections
Medicine & Health / Neuroscience
Oct 09, 2009 |
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Spontaneous brain activity formerly thought to be "white noise" measurably changes after a person learns a new task, researchers at Washington University School of Medicine in St. Louis and the University of Chieti, Italy, ...
Scientists develop novel use of neurotechnology to solve classic social problem
Medicine & Health / Neuroscience
Sep 10, 2009 |
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Economists and neuroscientists from the California Institute of Technology have shown that they can use information obtained through functional magnetic resonance imaging (fMRI) measurements of whole-brain activity to create ...
Memories exist even when forgotten, study suggests
Medicine & Health / Neuroscience
Sep 09, 2009 |
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A woman looks familiar, but you can't remember her name or where you met her. New research by UC Irvine neuroscientists suggests the memory exists - you simply can't retrieve it.
Future angst? Brain scans show uncertainty fuels anxiety
Medicine & Health / Neuroscience
Aug 17, 2009 |
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(PhysOrg.com) -- Anyone who has spent a sleepless night anguishing over a possible job loss has experienced the central finding of a new brain scan study: Uncertainty makes a bad event feel even worse.
Depression does 'make your brown eyes blue'
May 05, 2009 |
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It's more than just feeling bad. Clinical depression affects the way we process information in the brain, negatively affecting memory, attention span, and the brain's ability to learn new things. Now Tel ...
A Single Neuron Can Change the Activity of the Whole Brain
Medicine & Health / Neuroscience
May 01, 2009 |
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(PhysOrg.com) -- The pulsing of a single neuron can switch a brain’s waves from the equivalent of a big ocean swell to ripples on a pond, according to new research from Howard Hughes Medical Institute investigator ...
Researchers use brain interface to post to Twitter (w/Video)
Apr 20, 2009 |
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(PhysOrg.com) -- In early April, Adam Wilson posted a status update on the social networking Web site Twitter -- just by thinking about it.
Baby's first dreams: Research reveals sleep cycles in early fetus
Medicine & Health / Neuroscience
Apr 13, 2009 |
4.6 / 5 (8) |
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After about seven months growing in the womb, a human fetus spends most of its time asleep. Its brain cycles back and forth between the frenzied activity of rapid eye movement (REM) sleep and the quiet resting ...
A mother's criticism causes distinctive neural activity among formerly depressed
Medicine & Health / Neuroscience
Mar 31, 2009 |
4.3 / 5 (6) |
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(PhysOrg.com) -- Formerly depressed women show patterns of brain activity when they are criticized by their mothers that are distinctly different from the patterns shown by never depressed controls, according ...
New robot 'steered by human thought': Honda
Mar 31, 2009 |
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Japan's Honda said Tuesday it had developed a robot steered by human thought, thanks to a helmet-like device that measures a person's brain activity and sends signals to the machine.
'Mind-reading' experiment highlights how brain records memories
Medicine & Health / Neuroscience
Mar 12, 2009 |
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It may be possible to "read" a person's memories just by looking at brain activity, according to research carried out by Wellcome Trust scientists. In a study published today in the journal Current Biology, they show that o ...
Scientists identify the neural circuitry of first impressions
Medicine & Health / Neuroscience
Mar 08, 2009 |
3.6 / 5 (8) |
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Neuroscientists at New York University and Harvard University have identified the neural systems involved in forming first impressions of others. The findings, which show how we encode social information and then evaluate ...
Researchers find brain differences between believers and non-believers
Medicine & Health / Neuroscience
Mar 04, 2009 |
3.9 / 5 (35) |
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Believing in God can help block anxiety and minimize stress, according to new University of Toronto research that shows distinct brain differences between believers and non-believers.
Researchers identify a protein critical for memory, learning
Biology /
Feb 24, 2009 |
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Researchers from the University of Toronto and The Hospital for Sick Children (Sick Kids) have made a breakthrough discovery that may eventually change the way physicians approach treatment of learning and memory defects ...
