2005 Fiscal Year Final Research Report Summary
Experimental neuropsychological study on cerebral hemispheric differences of memory systems in the prefrontal lobes
| Project/Area Number |
15530472
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Experimental psychology
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| Research Institution | Fukuoka University of Education |
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Principal Investigator |
NAGAE Seiji Fukuoka University of Education, Fuculty of Education, Professor, 教育学部, 教授 (20108418)
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| Project Period (FY) |
2003 – 2005
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| Keywords | prefrontal lobe / memory system / cerebral hemispheric difference / HERA model / memory of temporal ordering / working memory |
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| Research Abstract |
The purpose of this study was to investigate the cerebral hemispheric differences in the prefrontal lobe on memory systems. The results were as follows.
Experiment 1 and 2 examined the cerebral hemispheric differences in the retrieval of episodic memory and semantic memory of verbal and non-verbal stimuli. Experiment 1 indicated that the retrieval of verbal episodic memory in the right visual field was better than in the left visual field and the difference of two visual fields on the retrieval of non-verbal episodic memory was not significant. Experiment 2 showed that the retrieval of verbal semantic memory in right visual field was better than that in left visual field and that the retrieval of non-verbal semantic memory in left visual field was better than that in right visual field.
Experiment 3 examined the relation between the verbal self-control of motor behavior and the memory of temporal ordering of verbal or non-verbal events. Results indicated that the low group in verbal recency test manifested significant poorer performances than the high group and there was no difference in performance between high and low groups in non-verbal recency-test. These results were interpreted as having supported the view that the verbal self-regulation of motor behavior is related to the function of the left-prefrontal lobe.
Experiment 4,5, and 6 examined Goldman-Rakic hypothesis that the working memory is related with a prefrontal lobe. The present study used a reading span test (RST) as the working memory task and used a cognitive bias task (CBT) representing the lateralization of prefrontal lobe. Results showed that the working memory capacity of right prefrontal lobe was bigger than the capacity of left prefrontal lobe.
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