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 waves
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, ...
Research sheds new light on epilepsy
Nov 30, 2009 |
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Pioneering research using human brain tissue removed from people suffering from epilepsy has opened the door to new treatments for the disease.
Toyota technology has brain waves move wheelchair
Jun 29, 2009 |
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(AP) -- Toyota Motor Corp. says it has developed a way of steering a wheelchair by just detecting brain waves, without the person having to move a muscle or shout a command.
Brain works best when cells keep right rhythms
Apr 26, 2009 |
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It is said that each of us marches to the beat of a different drum, but new Stanford University research suggests that brain cells need to follow specific rhythms that must be kept for proper brain functioning. These rhythms ...
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 ...
Auditory illusion: How our brains can fill in the gaps to create continuous sound
Medicine & Health / Neuroscience
Nov 25, 2009 |
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It is relatively common for listeners to "hear" sounds that are not really there. In fact, it is the brain's ability to reconstruct fragmented sounds that allows us to successfully carry on a conversation in a noisy room. ...
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, ...
The mind's eye scans like a spotlight
Medicine & Health / Neuroscience
Aug 12, 2009 |
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(PhysOrg.com) -- You're meeting a friend in a crowded cafeteria. Do your eyes scan the room like a roving spotlight, moving from face to face, or do you take in the whole scene, hoping that your friend's face ...
How we think before we speak: Making sense of sentences
Medicine & Health / Psychology & Psychiatry
Feb 20, 2009 |
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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, ...
Listening to music can change the way you judge facial emotions
Medicine & Health / Neuroscience
May 06, 2009 |
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A research project led by Dr Joydeep Bhattacharya at Goldsmiths, University of London has shown that it is possible to influence emotional evaluation of visual stimuli by listening to musical excerpts before the evaluation.
Guitarists' brains swing together (w/Video)
Medicine & Health / Neuroscience
Mar 17, 2009 |
4.3 / 5 (3) |
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When musicians play along together it isn't just their instruments that are in time - their brain waves are too. Research published in the online open access journal BMC Neuroscience shows how EEG readouts from pairs of gui ...
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 ...
Yawn alert for weary drivers
Jul 27, 2009 |
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We've all experienced it after long hours driving, the eyelids getting heavy, a deep yawn, neck muscles relaxing, the urge to sleep, the head nodding down... But, you're hands are still on the wheel and you only just stopped ...
Single gene mutation responsible for 'catastrophic epilepsy'
Jul 07, 2009 |
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Catastrophic epilepsy - characterized by severe muscle spasms, persistent seizures, mental retardation and sometimes autism - results from a mutation in a single gene, said Baylor College of Medicine researchers in a report ...
Making waves in the brain: Researchers use lasers to induce gamma brain waves in mice
Medicine & Health / Neuroscience
Apr 26, 2009 |
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Scientists have studied high-frequency brain waves, known as gamma oscillations, for more than 50 years, believing them crucial to consciousness, attention, learning and memory. Now, for the first time, MIT researchers and ...
