Longitudinal evaluation of visual P300 amplitude in clinical high-risk subjects: An event-related potential study

Naoya Oribe, Yoji Hirano, Elisabetta del Re, Raquelle I. Mesholam-Gately, Kristen A. Woodberry, Takefumi Ueno, Shigenobu Kanba, Toshiaki Onitsuka, Martha E. Shenton, Kevin M. Spencer, Margaret A. Niznikiewicz

研究成果: ジャーナルへの寄稿学術誌査読

16 被引用数 (Scopus)


Aim: We previously reported abnormal P300 and N200 in a visual oddball task, and progressive P300 amplitude reduction at 1-year follow-up in patients with first-episode schizophrenia. P300 reduction as well as intact P1/N1 were also observed in clinical high-risk subjects (CHR), but whether or not these components change over time is unknown. This study evaluates, longitudinally, the visual P300, as well as P1, N1, and N200, in CHR. Methods: Visual event-related potentials (ERP) were recorded twice, once at baseline and once at 1-year follow-up in CHR (n = 19) and healthy comparison subjects (HC; n = 28). Participants silently counted infrequent target stimuli (‘x’) among standard stimuli (‘y’) presented on the screen while the 64-channel electroencephalogram was recorded. Results: No CHR converted to psychosis from baseline to 1-year follow-up in this study. Visual P300 amplitude was reduced and the latency was delayed significantly in CHR at both time points compared with HC. Furthermore, CHR subjects who had more positive symptoms showed more amplitude reduction at both time points. P1, N1, and N200 did not differ between groups. Conclusion: Visual P300 amplitude was found to be reduced in CHR individuals compared with HC. We note that this finding is in subjects who did not convert to psychosis at 1-year follow-up. The association between visual P300 amplitude and symptoms suggests that for CHR who often experience clinical symptoms and seek medical care, visual P300 may be an important index that reflects the pathophysiological impairment underlying such clinical states.

ジャーナルPsychiatry and clinical neurosciences
出版ステータス出版済み - 10月 1 2020

!!!All Science Journal Classification (ASJC) codes

  • 神経科学一般
  • 神経学
  • 臨床神経学
  • 精神医学および精神衛生


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