The human brain is highly plastic.Cognitive training is usually used to modify functional connectivity of brain networks.Moreover,the structures of brain networks may determine its dynamic behavior which is related to...The human brain is highly plastic.Cognitive training is usually used to modify functional connectivity of brain networks.Moreover,the structures of brain networks may determine its dynamic behavior which is related to human cognitive abilities.To study the effect of functional connectivity on the brain dynamics,the dynamic model based on functional connections of the brain and the Hindmarsh–Rose model is utilized in this work.The resting-state fMRI data from the experimental group undergoing abacus-based mental calculation(AMC)training and from the control group are used to construct the functional brain networks.The dynamic behavior of brain at the resting and task states for the AMC group and the control group are simulated with the above-mentioned dynamic model.In the resting state,there are the differences of brain activation between the AMC group and the control group,and more brain regions are inspired in the AMC group.A stimulus with sinusoidal signals to brain networks is introduced to simulate the brain dynamics in the task states.The dynamic characteristics are extracted by the excitation rates,the response intensities and the state distributions.The change in the functional connectivity of brain networks with the AMC training would in turn improve the brain response to external stimulus,and make the brain more efficient in processing tasks.展开更多
文摘目的动脉瘤性蛛网膜下腔出血(aneurysmal subarachnoid hemorrhage,aSAH)后凝血功能异常影响患者预后。探讨aSAH首日患者凝血功能变化,并分析其与反映意识障碍程度的相关性。为重症aSAH患者首日精细化管理提供参考。方法40例发病24 h内入住神经重症监护室的aSAH患者,与20例年龄、性别相匹配的健康对照组进行比较。对血栓弹力图(thrombelastography,TEG)结果、GCS评分进行分析;根据入院时GCS评分进行亚组分析,比较GCS≤7和GCS>7亚组TEG各项结果;并分析其与GCS的相关性。结果与对照组比较,aSAH患者首日反应凝血因子功能的TEG-R值明显降低(4.18±1.54 vs 6.61±0.95,P=0.001);纤溶系统(LY30、EPL)和其他指标(MA、K、Angel)、常规凝血功能差异无统计学意义(P>0.05)。GCS≤7亚组较GCS>7亚组TEG-R值也明显降低(3.32±1.04 vs 5.24±1.41,P<0.001),且TEG-R与GCS评分具有相关性(r=0.551,P<0.001)。结论aSAH首日患者凝血因子功能增强的高凝状态,尤其是GCS≤7的患者,且与GCS高度相关;但纤溶系统无明显变化。
基金Project supported by the National Natural Science Foundation of China(Grant Nos.62276229 and 32071096).
文摘The human brain is highly plastic.Cognitive training is usually used to modify functional connectivity of brain networks.Moreover,the structures of brain networks may determine its dynamic behavior which is related to human cognitive abilities.To study the effect of functional connectivity on the brain dynamics,the dynamic model based on functional connections of the brain and the Hindmarsh–Rose model is utilized in this work.The resting-state fMRI data from the experimental group undergoing abacus-based mental calculation(AMC)training and from the control group are used to construct the functional brain networks.The dynamic behavior of brain at the resting and task states for the AMC group and the control group are simulated with the above-mentioned dynamic model.In the resting state,there are the differences of brain activation between the AMC group and the control group,and more brain regions are inspired in the AMC group.A stimulus with sinusoidal signals to brain networks is introduced to simulate the brain dynamics in the task states.The dynamic characteristics are extracted by the excitation rates,the response intensities and the state distributions.The change in the functional connectivity of brain networks with the AMC training would in turn improve the brain response to external stimulus,and make the brain more efficient in processing tasks.
