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In electroencephalography, the P50 is an event related potential occurring approximately 50 ms after the presentation of a stimulus, usually an auditory click. [1] The P50 response is used to measure sensory gating , or the reduced neurophysiological response to redundant stimuli.
Though some ERP components are referred to with acronyms (e.g., contingent negative variation – CNV, error-related negativity – ERN), most components are referred to by a letter (N/P) indicating polarity (negative/positive), followed by a number indicating either the latency in milliseconds or the component's ordinal position in the waveform.
The sweep technique is a hybrid frequency domain/time domain technique. [16] A plot of, for example, response amplitude versus the check size of a stimulus checkerboard pattern plot can be obtained in 10 seconds, far faster than when time-domain averaging is used to record an evoked potential for each of several check sizes. [16]
P50 (neuroscience), an auditory event-related potential recorded using EEG P50 (pressure) , the partial pressure of a gas required to achieve 50% enzyme saturation ASCC1 , activating signal cointegrator 1 complex subunit 1
In human neuroanatomy, brainstem auditory evoked potentials (BAEPs), also called brainstem auditory evoked responses (BAERs), are very small auditory evoked potentials in response to an auditory stimulus, which are recorded by electrodes placed on the scalp.
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EEG of the participants were analyzed, and the researchers found that the peak latency of the N200 occurred earlier when the response was contingent on semantic information than on phonological information. Thus, they were able to conclude that semantic information becomes available earlier than phonological information in language processing.
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