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Brain Activity, Conceptual Computer Artwork Poster
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Brain Activity, Conceptual Computer Artwork Poster
AssetID: 122375126 / {VICTOR HABBICK VISIONS} / Brain activity, conceptual computer artwork.
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_x000D_ Electroencephalography (EEG ) is the recording of electrical activity along the scalp . EEG measures voltage fluctuations resulting from ionic current flows within the neurons of 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 . Diagnostic applications generally focus on the spectral content of EEG, that is, the type of neural oscillations that can be observed in EEG signals. 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 , encephalopathies , and brain death . 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 with high (<1 mm) spatial="" resolution="" such="" as="" mri="" and="" ct="" .="" despite="" limited="" spatial="" resolution,="" eeg="" continues="" to="" be="" a="" valuable="" tool="" for="" research="" and="" diagnosis,="" especially="" when="" millisecond-range="" temporal="" resolution="" (not="" possible="" with="" ct="" or="" mri)="" is="" required.="" _x000d_=""></1 mm)>
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 (ERPs) 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.
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Brain Activity, Conceptual Computer Artwork Poster

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Product ID: 228881518858071611
Created on: 2/29/2012 3:42 PM
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