Blood flow measurement using functional magnetic resonance imaging and positron emission tomography (PET) has revealed that analgesia is related to decreased neural activities in pain-modulatory brain regions, such as the rostral anterior cingulate cortex (rACC), insula, thalamus, and brainstem including periaqueductal gray (PAG) and ventromedial medulla.
DDB () 函数使用算术降序法计算资产在给定期间的折旧。 因子是可选的, 如果省略则假定为 #。 所有参数都必须大于零 。springer springer