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Event-Related Potential - Essay Example

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Often, the executive functions are invoked when it is necessary to override responses that may otherwise be automatically elicited by stimuli in the external environment. It forecasts with a potentially rewarding stimulus, such as a tasty piece of chocolate cake, the automatic response might be to take a bite. The neural mechanisms by which the executive functions are implemented is a topic of ongoing debate in the field of cognitive neuroscience.Experimental psychologists and neuroscientists have discovered many different stimuli. The timing of these responses is thought to provide a measure of the timing of the brain's communication or time of information processing. Due to the consistency of the external response to novel stimuli, a brain-computer interface can be constructed which relies on it by arranging many signals in a grid, randomly

STUDIES AND RESEARCH DEVELOPMENT IN EVENT RELATED POTENTIALS
The ongoing electroencephalogram (EEG) provides a satisfactory scale for accessing temporal evolution of the brain activity associated with cognitive processes in health and disease. However, momentary changes in brain activity, as reflected in EEG, are rarely exploited due to lack of analytical tools and methodology. The electrodes covering the parietal lobe typically measure the P300 signal most strongly. The presence, magnitude, topography and time of this signal are often used as metrics of cognitive function in decision-making processes. While the neural substrates of this ERP remain hazy, the reproducibility of this signal makes it a common choice for psychological tests in both the clinic and the laboratory.

Although the EEG...
This essay stresses that the ongoing electroencephalogram (EEG) provides a satisfactory scale for accessing temporal evolution of the brain activity associated with cognitive processes in health and disease. However, momentary changes in brain activity, as reflected in EEG, are rarely exploited due to lack of analytical tools and methodology. The electrodes covering the parietal lobe typically measure the P300 signal most strongly. The presence, magnitude, topography and time of this signal are often used as metrics of cognitive function in decision-making processes. While the neural substrates of this ERP remain hazy, the reproducibility of this signal makes it a common choice for psychological tests in both the clinic and the laboratory.
This paper declares that the EEG signal is most strongly acquired around the parietal electrodes, interactions involving the frontal and temporal regions as well as several deep brain loci have been suggested. These components respond individually to different stimuli, and it has been suggested that the P300 originates from stimulus-driven frontal attention mechanisms during task processing. The P300 signal is an aggregate recording from a great many neurons In practice, the P300 waveform must be evoked using a stimulus delivered by one of the sensory modalities. One typical procedure is the 'oddball' paradigm, whereby a target stimulus is presented amongst more frequent standard background stimuli. A distracter stimulus may also be used to ensure that the response is due to the target rather than the change from a background pattern. ...Show more
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This paper examines the relationship between event related brain potentials and theories about cognitive functioning in both normal and clinical populations. It analyses the viability to develop basic skills in ERP recording process in the mode of psycho physiological method…
Event-Related Potential
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