Study of hippocampal theta rhythm during nonlinear and linear tasks in rats

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  • SAKIMOTO Yuya
    Graduate School of Integrated Arts and Sciences, Hiroshima University
  • HATTORI Minoru
    Graduate School of Biomedical Sciences, Hiroshima University
  • SAKATA Shogo
    Graduate School of Integrated Arts and Sciences, Hiroshima University

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  • 非線形課題と線形課題中のラットの海馬θ波の検討
  • ヒセンケイ カダイ ト センケイ カダイ チュウ ノ ラット ノ カイバthハ ノ ケントウ

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Abstract

This study examined hippocampal theta rhythm during nonlinear and linear tasks in rats. In experiment one, hippocampal theta rhythm was recorded during a negative patterning task (serving as a nonlinear task) and a simple discrimination task (serving as a linear task). In experiment two, hippocampal theta rhythm was recorded during a positive patterning task (serving as a nonlinear task) and a simple discrimination task (serving as a linear task). The results revealed that hippocampal theta power increased during compound trials in the negative patterning task, but did not increase in positive patterning or simple discrimination trials. These findings indicated a relationship between hippocampal theta rhythm and negative patterning with compound stimuli.

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