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.
Researchers find brain differences between believers and non-believers
Medicine & Health / Neuroscience
Mar 04, 2009 |
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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 discover new mechanism for attentional control in the human brain
Dec 15, 2008 |
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A study by UC Davis researchers appearing in the journal Science reports the discovery of a new mechanism of attention in the human brain. Previous studies in animals implicated changes in the state of a portion of the br ...
UCLA study finds that searching the Internet increases brain function
Oct 14, 2008 |
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UCLA scientists have found that for computer-savvy middle-aged and older adults, searching the Internet triggers key centers in the brain that control decision-making and complex reasoning. The findings demonstrate ...
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 ...
Neuroscientist scans brain for clues on best time to multitask
Sep 02, 2008 |
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In today's fast-paced world, multitasking has become an increasingly necessary part of our daily routine. Unfortunately, multitasking also is notoriously inefficient. However, a new brain imaging study led by a cognitive ...
Learning to shape your brain activity
Oct 01, 2008 |
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A study in the Oct. 1 issue of the journal Sleep shows that the successful manipulation of sensorimotor rhythm (SMR) amplitude by instrumental SMR conditioning (ISC) improved sleep quality as well as declarative learning. ISC mi ...
Brain energy use key to understanding consciousness
Medicine & Health / Neuroscience
Jun 16, 2009 |
4.4 / 5 (14) |
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High levels of brain energy are required to maintain consciousness, a finding which suggests a new way to understand the properties of this still mysterious state of being, Yale University researchers report.
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.
Obsessive compulsive disorder linked to brain activity
Jul 17, 2008 |
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Cambridge researchers have discovered that measuring activity in a region of the brain could help to identify people at risk of developing obsessive compulsive disorder (OCD).
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.
Researchers produce 'neural fingerprint' of speech recognition
Nov 10, 2008 |
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Scientists from Maastricht University (Netherlands) have developed a method to look into the brain of a person and read out who has spoken to him or her and what was said. With the help of neuroimaging and data mining techniques ...
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.
How we think before we speak: Making sense of sentences
Medicine & Health / Psychology & Psychiatry
Feb 20, 2009 |
4.9 / 5 (10) |
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We engage in numerous discussions throughout the day, about a variety of topics, from work assignments to the Super Bowl to what we are having for dinner that evening. We effortlessly move from conversation to conversation, ...
Scientists read minds with infrared scan
Feb 10, 2009 |
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Researchers at Canada's largest children's rehabilitation hospital have developed a technique that uses infrared light brain imaging to decode preference - with the goal of ultimately opening the world of choice to children ...
