时间认知的脑机制研究

从神经心理学和脑成像2个领域综述了有关时间认知脑机制的研究。神经心理学及脑损伤的研究结果表明小脑可能与内部时钟功能有关，前额叶可能调节时间认知中的注意过程。PET和fMRI脑成象研究结果显示，基底神经节、小脑和前额叶在所有的计时作业中都被激活。ERP的研究结果还证实，时间信息加工和非时间信息加工存在时间历程上的差异，并且时间信息加工还存在的显著半球优势效应。因此基底神经节、小脑和前额叶可能是时间认知的主要脑机制，但由于研究材料、方法和程序的不同，大脑皮层的广泛区域都有可能参与时间信息的加工。

The Brain Mechanism Of Temporal Cognition

The brain mechanism of temporal cognition was reviewed based on the research findings of neuropsychology and brain imaging. The neuropsychological research showed that cerebellum is related to internal clock, and prefrontal cortex control attention in temporal processing. The results of PET and fMRI indicated that basal ganglia, prefrontal cortex and cerebellum were activated in timing tasks. The evidences from ERP research revealed that there is distinct ERP components between the temporal information processing and nontemporal information processing. Furthermore there showed lateralization in temporal processing. Based on the results, Basal ganglia, prefrontal cortex and cerebellum may contribute to the functional of temporal cognition. Under different experimental conditions and timing task, various cortex were presumably involved the temporal information processing.