心理学学术沙龙

题目：Axonal Fiber Terminations Concentrate on Gyri

主讲人: 聂晶鑫副教授

时间：6月13日（周四）下午4点到5点

地点：心理学院大楼301会议室

内容简介：

Convoluted cortical folding and neuronal wiring are two prominent attributes of the mammalian brain. However, the macro-scale intrinsic relationship between these two general cross-species attributes, as well as the underlying principles that sculpt the architecture of the cerebral cortex, remains unclear. Here we show that the axonal fibers connected to gyri are significantly denser, than the ones connected to sulci. We found that dominant percentages of axonal fibers are connected to gyri in human, chimpanzee and macaque monkey brains. This finding has been replicated in a range of mammalian brains via diffusion tensor imaging (DTI) and high angular resolution diffusion imaging (HARDI). These results might suggest fundamental mechanisms for development and organization of the cerebral cortex, and inspired us to hypothesize that axonal pushing is a mechanism of cortical folding and that gyri have significantly higher functional activities and long-distance interactions than sulci.