Objective: A large number of cognitive impairment and imaging studies found that attentional systems includes both bottom-up and top-down control, i.e., ventral attention network (VAN) and dorsal atte
系统的吸引子往往代表长期的状态，而其往往是稳定的。即吸引子附近的初始点出发的轨迹会落在该吸引子上。这种动力学概念被广泛应用到神经网络处理信息当中。在脉冲耦合振子系统当中，系统出现一些不满足稳定性定义的吸引子。最极端的是，一个局部具有鞍性的不动点，却在相空间会有非零测度的初始点最终落在该鞍点上。这种被称为不稳定不动点[1-2]。这发展出了有别与基于吸引子的信息计算模型，刺激通过鞍点的异宿切换来反映。
Multiple cell classes have been found in the primary visual cortex, but the relationship between cell types and spatial summation has seldom been studied.Parvalbumin-expressing inhibitory interneurons
Winner-take-all (WTA) competition is an important computational principle in the brain, by which neurons can compete with each other for activation.Through configuring its network parameters, the WTA
Background: Yu-ping-feng-san (YPFS) is a clinical Chinese medical formula used for treating asthma and other allergic diseases, but the underlying mechanisms in reducing relapse of allergy in allergic
Several studies have reported that amyloid fibrils formed from a naturally occurring peptide fragment of prostatic acidic phosphatase (PAP248-286) in semen, known as semen-derived enhancer of viral in
Ischemic stroke is a leading cause of long-term disability.Although previous studies have identified some promising neuroprotective agents, such as cinnamophilin, EGCG, and oxyresveratrol, their prote
In recent years the demand for customized FE (finite element) and CFD (computational fluid dynamics) models has increased rapidly in the biomedical and health care sector.The use of virtual models for
目的 大脑白质的发育受遗传因素和环境因素的共同影响.目前对青春期大脑白质的遗传度的研究较少.本研究拟利用青春期双生子磁共振弥散张量图像探讨大脑白质的遗传度.方法 从青岛市双生子库招募45对双生子(男24对,女21对),行3.0T 核磁共振扫描,采集弥散张量图像,使用FSL进行图像处理,生成部分各向异性指数(FA)图,根据ICBM-DTI-81图谱计算35条主要白质纤维束的平均FA值,使用结构方程模
目的 执行注意可以调节我们的想法、情绪和反应,其个体差异与任务相关的脑活动紧密相关.但是这种个体差异是否与自发性脑活动相关仍然不清楚.方法 本研究通过对57名健康自愿者进行静息态功能磁共振扫描,检测自发性脑活动是否可以预测执行注意的个体差异,以此来探索自发性脑活动对执行注意的潜在影响,并计算了静息状态下低频振幅(ALFF)和功能连接连接与执行注意行为学之间的相关性.