Definition 上游充通大 Shanghai Jiao Tong University Psychiatric disorders:any of various conditions characterized by impairment of an individual's normal cognitive,emotional,or behavioral functioning,and caused by social, psychological,biochemical,genetic,or other factors,such as infection or head trauma. 多种原因引起精神活动障碍的一类疾病 分类、定义多样 可以细分为300多种Shanghai Jiao Tong University Psychiatric disorders：any of various conditions characterized by impairment of an individual's normal cognitive, emotional, or behavioral functioning, and caused by social, psychological, biochemical, genetic, or other factors, such as infection or head trauma. 多种原因引起精神活动障碍的一类疾病 分类、定义多样 可以细分为300多种 Definition