EVOKED POTENTIALS, P300 COMPONENT
\ɪvˈə͡ʊkt pətˈɛnʃə͡lz], \ɪvˈəʊkt pətˈɛnʃəlz], \ɪ_v_ˈəʊ_k_t p_ə_t_ˈɛ_n_ʃ_əl_z]\
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A late-appearing component of the event-related potential. P stands for positive voltage potential and 300 represents 300 millisecond poststimulus. Its amplitude increases with unpredictable, unlikely, or highly significant stimuli and thereby constitutes an index of mental activity. (From Campbell, Psychiatric Dictionary, 6th ed)
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