Objective To observe the behavioral model,brain activation model,and relationship between these two models during expected value(EV)processing in decision-making under risk. Methods Twenty-six healthy volunteers were enrolled as subjects.In the E-Prime system,the subjects received a task of decision-making under risk,which offered a 60% chance to win a reward.The decision-making model and profit and loss scores were recorded.The SA-9800 brain function audiovisual stimulation system and GE 3.0 Tmagnetic reso...