Characteristics of Alertness Brain Network Based on Mutual Information
To maintain high performance and to avoid accidents,astronauts must maintain a high state of alertness when performing missions in orbit.Brain network connectivity is closely related to human cognition,including alertness,attention and memory.The analysis and study of brain net-work mechanism under different alertness levels can provide a powerful tool for real-time detection of alertness and rapid improvement of alertness levels.The combination of psychomotor vigilance task and 3-back task was used to reduce alertness,and signals of electroencephalography were collected throughout the process.Mutual information was used to build the functional brain networks,and changes in brain networks at different levels of alertness were analyzed based on graph theory.The result showed that the frontal and occipital region of brain were closely related to alertness.In the state of low alertness,the functional connections of the brain decrease,the ability of the brain to dif-ferentiate and integrate external information decreased,the efficiency of information transmission de-creased,and the brain activity decreased.
NETL
NSTL
万方数据
