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
Brain activity exposes those who break promises
Medicine & Health / Neuroscience
Dec 09, 2009 |
2 / 5 (1) |
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Scientists from the University of Zurich have discovered the physiological mechanisms in the brain that underlie broken promises. Patterns of brain activity even enable predicting whether someone will break a promise. The ...
Epilepsy Patients Are Given New Hope With Brain Implant
Medicine & Health / Neuroscience
Dec 09, 2009 |
5 / 5 (4) |
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(PhysOrg.com) -- A startup company, Neuropace in Mountain View Ca., has developed a device that offers new hope for epilepsy patients. The device is designed to neutralize the abnormal electrical activity ...
How to read brain activity?
Medicine & Health / Neuroscience
Dec 04, 2009 |
4 / 5 (6) |
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(PhysOrg.com) -- For the very first time, scientists show what EEG can really tell us about how the brain functions.
Intel wants a chip implant in your brain
Nov 23, 2009 |
4.4 / 5 (35) |
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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.
Now you see it, now you know you see it
Medicine & Health / Neuroscience
Nov 30, 2009 |
4.8 / 5 (6) |
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There is a tiny period of time between the registration of a visual stimulus by the unconscious mind and our conscious recognition of it ― between the time we see an apple and the time we recognize it as an apple. Our ...
Memories exist even when forgotten, study suggests
Medicine & Health / Neuroscience
Sep 09, 2009 |
4.4 / 5 (14) |
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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.
Study uses brain scans to discover how children 'read' faces
Medicine & Health / Psychology & Psychiatry
Nov 20, 2009 |
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(PhysOrg.com) -- Oxford University scientists are using brain-scanning technology to understand how we learn to recognise and 'read' faces as children.
Researchers use brain interface to post to Twitter (w/Video)
Apr 20, 2009 |
4.4 / 5 (12) |
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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.
Scans show learning 'sculpts' the brain's connections
Medicine & Health / Neuroscience
Oct 09, 2009 |
4.8 / 5 (6) |
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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, ...
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.
Future angst? Brain scans show uncertainty fuels anxiety
Medicine & Health / Neuroscience
Aug 17, 2009 |
5 / 5 (6) |
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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.
Scientists develop novel use of neurotechnology to solve classic social problem
Medicine & Health / Neuroscience
Sep 10, 2009 |
5 / 5 (4) |
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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 ...
Depression does 'make your brown eyes blue'
May 05, 2009 |
4.7 / 5 (9) |
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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 ...
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 ...
New robot 'steered by human thought': Honda
Mar 31, 2009 |
4.2 / 5 (14) |
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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.
