摘要
目的研究认数及计算刺激诱发事件相关电位(ERPs)的相关性。方法分别用两位阿拉伯数字和10以内加减法算术题,对26名健康大学生进行认知测试,刺激信号触发与数字化脑电图(EEG)记录同步,提取认数和计算的ERPs,分析ERPs特征及其发生源。结果认数和计算刺激均诱发波形类似但潜伏期不同的正向和负向的ERPs成分,认数ERPs的潜伏期明显短于计算ERPs;ERPs总平均图显示认数和计算ERPs电活动均在顶叶能量最高。结论计算认知过程比认数认知过程复杂,可能认数及计算的神经电生理基础不同,属两种不同加工过程。进行认数和计算数字加工任务时,主要激活的脑区在顶叶。
Objective To investigate the relation of event-related potentials （ ERPs ） , which are evoked by calculating and number recognizing stimuli. Methods We examined 26 healthy undergraduate students with doubledigit （Arabic numbers ） and single-digit modify a prescription problems. While the stimulus information was presented, electroencephalogram （EEG） was recorded simultaneously. ERPs were extracted from EEG data, and then the feature and source of ERPs were analyzed. Results Both calculation and number recognizing induced positive and negative components of ERPs with similar wave form and different latency. The latency of ERPs was conspicuously shorter elicited by number recognizing than by calculating. Grand mean mapping showed the highest amplitudes of ERPs were presented in parietal lobe elicited both by calculating and number recognizing. Conclusion The processing of calculating is more complicated than number recognizing. Calculating and number recognizing may have different electrophysiological background, and they belong to diverse processing course in the brain. Parietal lobe is the functional domains of them.
出处
《临床神经病学杂志》
CAS
北大核心
2005年第6期401-403,共3页
Journal of Clinical Neurology
基金
国家自然科学基金资助项目(30470566)
