刺激弁別課題におけるラット海馬の電気生理学的検討 <学位論文要旨>

Electrophysiological study of the hippocampus on stimulus discrimination tasks in the rat <Summaries of the Doctoral Theses>

Sakimoto Yuya

広島大学大学院総合科学研究科紀要. I, 人間科学研究

Bulletin of the Graduate School of Integrated Arts and Sciences, Hiroshima University. I, Studies in human sciences

Sutherland & Rudy (1989) proposed configural association theory that the hippocampus plays a role in configuration of compound stimuli. This theory assumed that the hippocampus is necessarily for solving non-linear task but is not necessarily for solving linear task. This study examined the relationship hippocampal theta and non-linear and linear task. The chapter 1 presents a review of previous research. The chapter 2 showed that the hippocampal theta power during negative patterning task (A+, B+, AB-) as non-linear task was higher than simple discrimination task (A+, B-) as linear task. The chapter 3 showed that the hippocampal theta power during positive patterning task (A-, B-, AB+) as non-linear task was not higher than simple discrimination task (A+, B-) as linear task. The chapter 4 reanalyzed the data of chapter 2 and 3 by time-frequency analysis. The chapter 5 compared the hippocampal theta power during negative patterning (A+, B+, AB-), simultaneous feature negative (A+, AB -) and simple discrimination task (A+, B-). The result revealed that the hippocampal theta was the highest in negative patterning task, followed by simultaneous feature negative and simple discrimination task. In the chapter 6, I discussed these result of this study and proposed the new hippocampal function theory that the hippocampus is important for the modulation of expectation value of reinforcement for compound stimulus.

rat

hippocampal theta

non-linear task

expectation value

Psychology [ 140 ]

jpn

広島大学大学院総合科学研究科

Copyright (c) 2012 by Graduate School of Integrated Arts and Sciences, Hiroshima University All rights reserved

[ISSN] 1881-7688

[NCID] AA12198647