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.
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.
First-time Internet users find boost in brain function after just one week
Medicine & Health / Neuroscience
Oct 19, 2009 |
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(PhysOrg.com) -- You can teach an old dog new tricks, say UCLA scientists who found that middle-aged and older adults with little Internet experience were able to trigger key centers in the brain that control ...
Action video game players experience diminished proactive attention
Medicine & Health / Psychology & Psychiatry
Oct 13, 2009 |
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Video game players are often accused of passively reacting to tasks that are spoon fed to them through graphics and stimuli on the screen. A group of researchers from Iowa State University shows that playing lots of video ...
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, ...
Special brain wave boost slows motion
Medicine & Health / Neuroscience
Oct 01, 2009 |
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Researchers have found that they can make people move in slow motion by boosting one type of brain wave. The findings offer some of the first proof that brain waves can have a direct influence on behavior, ...
Babies see it coming
Medicine & Health / Psychology & Psychiatry
Sep 24, 2009 |
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Do infants only start to crawl once they are physically able to see danger coming? Or is it that because they are more mobile, they develop the ability to sense looming danger? According to Ruud van der Weel and Audrey van ...
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 ...
You can believe your eyes: New insights into memory without conscious awareness
Medicine & Health / Neuroscience
Sep 09, 2009 |
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(PhysOrg.com) -- Scientists may have discovered a way to glean information about stored memories by tracking patterns of eye movements, even when an individual is unable (or perhaps even unwilling) to report what they remember. ...
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.
Research Gives New Perspective On Brain Activities
Sep 08, 2009 |
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(PhysOrg.com) -- University of Victoria (Canada) researcher Phil Zeman has developed a new and less expensive procedure for analyzing EEG (electroencephalogram) data that identifies the location of special brain activities.
New study suggests the brain predicts what eyes in motion will see
Medicine & Health / Neuroscience
Aug 25, 2009 |
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When the eyes move, objects in the line of sight suddenly jump to a different place on the retina, but the mind perceives the scene as stable and continuous. A new study reports that the brain predicts the consequences of ...
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.
New links between lucid dreaming and psychosis could revive dream therapy in psychiatry
Medicine & Health / Psychology & Psychiatry
Jul 29, 2009 |
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Similarities in brain activity during lucid dreaming and psychosis suggest that dream therapy may be useful in psychiatric treatment, a European Science Foundation (ESF) workshop has found. This is strengthened by the potential ...
Researchers develop 'brain-reading' methods
Medicine & Health / Psychology & Psychiatry
Jul 27, 2009 |
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It is widely known that the brain perceives information before it reaches a person's awareness. But until now, there was little way to determine what specific mental tasks were taking place prior to the point of conscious ...
