Related topics: brain , functional magnetic resonance imaging , proceedings of the national academy of sciences , brain regions , functional magnetic resonance
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
Depression saps endurance of the brain's reward circuitry
Medicine & Health / Neuroscience
Dec 21, 2009 |
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A new study at the University of Wisconsin-Madison suggests that depressed patients are unable to sustain activity in brain areas related to positive emotion.
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Researchers crack part of the neuronal code
Medicine & Health / Neuroscience
Dec 22, 2009 |
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(PhysOrg.com) -- Prostheses for paralysed patients, communication with patients who have lost all capacity for normal communication - the hopes for modern brain research are high. However, such brain-machine ...
Neuroscientists uncover possible basis of short-term memory
Medicine & Health / Neuroscience
21 hours ago |
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Ben W. Strowbridge, PhD, associate professor of neuroscience and physiology/biophysics, and Phillip Larimer, PhD, a MD/PhD student in the neurosciences graduate program at Case Western Reserve University School of Medicine, ...
We now know that the brain controls the formation of bone
Dec 22, 2009 |
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The brain acts as a profound regulatory centre, controlling myriad processes throughout the body in ways we are only just beginning to understand. In new findings, Australian scientists have shown surprising connections between ...
Dutch researchers explore advanced brain diagnostic techniques
Medicine & Health / Neuroscience
Dec 21, 2009 |
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At present the task of diagnosing brain disorders using electroencephalography (EEG) is still performed by humans, but in years to come it will increasingly be taken over by computerized systems. This will ...
Scientists discover 2 genes that drive aggressive brain cancers
Dec 23, 2009 |
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A team of Columbia scientists have discovered two genes that, when simultaneously activated, are responsible for the most aggressive forms of human brain cancer.
New human reproductive hormone could lead to novel contraceptives
Dec 22, 2009 |
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(PhysOrg.com) -- Nearly 10 years after the discovery that birds make a hormone that suppresses reproduction, University of California, Berkeley, neuroscientists have established that humans make it too, opening ...
Study shows a key protein helps control blood pressure
Dec 23, 2009 |
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University of Iowa researchers have shown that a protein channel helps nerve sensors in blood vessels keep blood pressure in check. Without the protein channel, known as ASIC2, the sensors are unable to send the brain the ...
Could acetaminophen ease psychological pain?
Medicine & Health / Psychology & Psychiatry
Dec 22, 2009 |
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Headaches and heartaches. Broken bones and broken spirits. Hurting bodies and hurt feelings. We often use the same words to describe physical and mental pain. Over-the-counter pain relieving drugs have long been used to alleviate ...
Machine Translates Thoughts into Speech in Real Time
Medicine & Health / Neuroscience
Dec 21, 2009 |
4.8 / 5 (68) |
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(PhysOrg.com) -- By implanting an electrode into the brain of a person with locked-in syndrome, scientists have demonstrated how to wirelessly transmit neural signals to a speech synthesizer. The "thought-to-speech" ...
Sniffing out clues to dogs' compulsive behavior
Dec 22, 2009 |
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(PhysOrg.com) -- At first glance, a dog chasing its tail seems a harmless, if fruitless, pursuit. But for many dogs and their owners, the habit has a dark side, one that means endless hours and energy spent ...
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