Neural representations of long-term digital memory: an fMRI study
10.3760/cma.j.issn.1674-6554.2010.10.025
- VernacularTitle:大学生数字长时记忆的脑功能磁共振定位研究
- Author:
Jinlong ZHENG
;
Siyun SHU
;
Songhao LIU
;
Xinmin BAO
;
Yongming WU
;
Zengqiang ZHANG
;
Lixin HAN
- Publication Type:Journal Article
- Keywords:
Digital memory;
Long-term memory;
Functional magnetic resonance imaging
- From:
Chinese Journal of Behavioral Medicine and Brain Science
2010;19(10):936-937
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the neural representations of long-term digital memory in human brain by functional magnetic resonance imaging (fMRI) technique. Methods 22 right-handed normal volunteers were recruited to participate in a test of long-term digital memory while the fMRI data were recorded. Control tasks were performed for the block-design. SPM 99 was used to analyze the data and to obtain the activated brain regions.Numbers of activated voxels were used to calculate lateralization index (LI). Results When the threshold was set as P＜0. 0001 ,using a one-sample t -test,the middle gyrus of the left frontal lobe(t=9.68) and the right cerebellum ( t = 9.85 ) were activated remarkably during the memory task. The subcortical structures including the thalamus (t=6.72) and the caudate (t=6.58) were also obviously activated during the memory task. LI of the numbers of activated voxels was 0.51. Conclusions The subcortical structures and the cerebellum as well as the cerebral cortex are collaborative to contribute to long-term digital memory function in human brain. The results also reveal that the functional areas of long-term digital memory in human brain are localized with the functional lateralization in the left hemisphere.
