28th International Congress of Psychology August 8 ... - U-netSURF

It is proposed that simple multiplication facts are stored and retrieved in a domain specific
visuospatial magnitude representation, known as mental number line. The present fMRI study
revealed that compared with a visual fixation task, 1-digit multiplication caused intensive
activations in left superior and inferior parietal lobule, and left premotor cortex, either in Arabic or
Chinese number form, but far less activations in traditional language areas. The activated cerebral
network strongly overlaps with that involved in motor and visuospatial processing. It is further
supported by a behavioral study showing mental number line may play an important role during
simple multiplication.
2028.150 Premotor cortex in numerical processing: A meta-analysis to neuroimaging studies, Qi
Dong, Hongchuan Zhang, Xinlin Zhou, Yi Guo, Hui Zhao, Beijing Normal University,Beijing,
China
Premotor cortex was repeatedly found activated in various numerical processing tasks, but its
actual role remains cloudy until today. A meta-analysis with 17 papers was used to explore the
possible role of premotor cortex in numerical processing. The dorsolateral (PMd) and ventrolateral
premotor area (PMv) were significantly activated in most studies, while few involved SMA.
Number comparison, addition and subtraction caused more activation in PMd, multiplication and
addition caused more in PMv. The rostral parts of PMd, PMv and SMA were significantly
modulated by numerical properties. This suggests a role more than motor reaction of premotor
cortex during numerical processing.
2028.151 Dynamic processes and dissociation of Chinese characters and spatial information in
working memory: An event-related potential study, Yiwen Wang, Chongde Lin, Yuejia Luo,
Xing Wei, Institute of Psychology, Chinese Academy of Sciences, China
In order to explore activation time-course and space domain of maintaining Chinese characters
and spatial information in working memory, event-related potentials were measured when 14
normal adult participants (6 males, 8 females; ages 18-25) were performing delay-match tasks.
During the delay interval, P250 was generated in bilateral frontal cortex. The latency of P250
elicited by Chinese characters in left PFC extended to 800ms, and the latency of P250 elicited by
spatial locations in right PFC extended to 1000ms. N150 was elicited in bilateral parieto-occipital
areas, which ended at 500ms and was followed by a sustained negative complex (SNC).
2028.152 Neuroimaging studies of post traumatic stress disorder effects on the brain, Wanzhen
Wu, Hu Zhao, Shantou University, China
Neuroimaging techniques, including CT, MRI, MRS, SPECT, PET and fMRI, provide
opportunities to investigate structural and functional brain abnormalities. Post traumatic stress
disorder (PTSD) is the abnormity of brain function followed serous and/or long-time chronic
stress. This article will briefly review the evidences for brain changes in PTSD, which involve
structural, biochemical, functional aspects, and attempt to integrate ever more complex
neurobiological models across neurochemical systems and structures into a cohesive
understanding of PTSD. And the functional connectivity is the promising ways to explore the
pathogenesis of the disorder.
2028.153 Regional brain volume correlations in disorders of neurodevelopment; can we date the
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