Effects of Task Difficulty and Aging on Brain Activation——Take encoding of cued memory as an example

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Effects of Task Difficulty and Aging on Brain Activation——Take encoding of cued memory as an example

Wang Dahua1；Fu Yan1；Tang Dan2；Duan Yunyun3；Yu Chunshui3

Institute of Developmental Psychology, Beijing Normal University；Institute of Population Research, Renmin University of China；Xuanwu Hospital

Received:2010-10-28 Online:2012-02-20 Published:2012-01-20
Contact: Wang Dahua

任务难度与老化对大脑激活的影响——以线索记忆编码为例

王大华1；付艳1；唐丹2；段云云3；于春水3

北京师范大学发展心理学研究所；中国人民大学人口研究所；北京宣武医院放射科

通讯作者: 王大华
作者简介:王大华，女，北京师范大学发展心理研究所教授，博士
基金资助:
国家自然科学基金（青年，30500160）的资助

Abstract

Abstract: The primary aim of this research was to investigate the relationship between the task difficulty and the brain activation, especially under the effects of aging. Fifteen(8 male, 7 female)younger and thirteen(5 male, 8 female)older adults participated in t

Key words: aging, difficulty, compensation, cued recall, fMRI.

摘要： 以汉语名词双字词对为材料，采用了两种性质、三种难度水平的线索回忆任务对12名老年被试和15名年轻被试的项目记忆编码过程进行fMRI扫描，考察在编码阶段大脑激活受任务难度变化和老化的影响。行为研究结果发现：年龄的主效应、难度的主效应以及难度与年龄交互作用均显著，即，随着任务难度的增加，老年人的成绩更加明显地低于年轻人。神经成像研究结果发现：（1）当词对的相关性降低时，大脑激活的增强主要表现为面积的增加，而当词对的频率降低时，主要表现在激活强度的增加上。（2）任务难度和大脑激活面积、强度之间均不存在对应的递增

关键词: 老化, 难度, 补偿, 线索回忆, fMRI

CLC Number:

B844.4

Wang Dahua；Fu Yan；Tang Dan；Duan Yunyun；Yu Chunshui. Effects of Task Difficulty and Aging on Brain Activation——Take encoding of cued memory as an example[J]. .

王大华；付艳；唐丹；段云云3；于春水4. 任务难度与老化对大脑激活的影响——以线索记忆编码为例[J]. .

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