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
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
News tagged with brain waves
Researchers show brain waves can 'write' on a computer in early tests
19 hours ago |
4.9 / 5 (13) |
4
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 |
5 / 5 (1) |
1
Pioneering research using human brain tissue removed from people suffering from epilepsy has opened the door to new treatments for the disease.
Auditory illusion: How our brains can fill in the gaps to create continuous sound
Medicine & Health / Neuroscience
Nov 25, 2009 |
not rated yet |
0
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. ...
Search results for brain waves
Young adults' blood lead levels linked to depression, panic disorder
Medicine & Health / Psychology & Psychiatry
5 hours ago |
4 / 5 (2) |
1
Young adults with higher blood lead levels appear more likely to have major depression and panic disorders, even if they have exposure to lead levels generally considered safe, according to a report in the December issue ...
Brain scans show distinctive patterns in people with generalized anxiety disorder
Medicine & Health / Psychology & Psychiatry
5 hours ago |
4 / 5 (1) |
0
Scrambled connections between the part of the brain that processes fear and emotion and other brain regions could be the hallmark of a common anxiety disorder, according to a new study from the Stanford University School ...
HIV-related memory loss linked to Alzheimer's protein
Medicine & Health / Neuroscience
5 hours ago |
not rated yet |
0
More than half of HIV patients experience memory problems and other cognitive impairments as they age, and doctors know little about the underlying causes. New research from Washington University School of Medicine in St. ...
A see-through surprise: Scientists make solid material transparent to terahertz waves
5 hours ago |
4.6 / 5 (10) |
0
Very often in science, the unexpected discovery turns out to be the most significant. Rice University Professor Junichiro Kono and his team weren't looking for a breakthrough in the transmission of terahertz signals, but ...
Transcription factors guide differences in human and chimp brain function
5 hours ago |
5 / 5 (1) |
0
Humans share at least 97 percent of their genes with chimpanzees, but, as a new study of transcription factors makes clear, what you have in your genome may be less important than how you use it.
Delivering medicine directly into a tumor
6 hours ago |
not rated yet |
0
Researchers at Burnham Institute for Medical Research at University of California, Santa Barbara have identified a peptide (a chain of amino acids) that specifically recognizes and penetrates cancerous tumors but not normal ...
With amino acid diet, mice improve after brain injury
6 hours ago |
5 / 5 (3) |
0
Neurology researchers have shown that feeding amino acids to brain-injured animals restores their cognitive abilities and may set the stage for the first effective treatment for cognitive impairments suffered by people with ...
Don't I know you? Research sheds light on memorial retrieval
Medicine & Health / Neuroscience
6 hours ago |
not rated yet |
0
We have all had the embarrassing experience of seeing an acquaintance in an unfamiliar setting. We know we know them but can't recall who they are. But with the correct cues from conversation or context, something seems ...
Antidepressant Can Change Patient's Personality
Medicine & Health / Psychology & Psychiatry
6 hours ago |
4 / 5 (6) |
0
(PhysOrg.com) -- The nation is still debating the effects of antidepressant medications on brain chemistry almost 20 years after publication of the best-seller "Listening to Prozac." Though selective serotonin reuptake inhibitors ...
The thalamus, middleman of the brain, becomes a sensory conductor
Medicine & Health / Neuroscience
7 hours ago |
3.7 / 5 (3) |
1
Two new studies show that the thalamus--the small central brain structure often characterized as a mere pit-stop for sensory information on its way to the cortex--is heavily involved in sensory processing, and is an important ...
List of search results for brain waves
