PMS involves negative behavioral, cognitive and physical symptoms from the time of ovulation to menstruation.

经前综合征包含了负面的行为、认知 和身体上的一系列症状，从排卵期延续到月经期。

Scientists in the U.S. say they can detect autism in children's brains long before any behavioral symptoms emerge.

美国科学家表示，其能在自闭症儿童出现行为症状很久之前就检测到其大脑中的自闭症迹象。

Behavioral symptoms may include avoidance of situations, restlessness, agitation, pacing, and hyperventilation.

行为症状可能包括回避情境、烦躁不安、激动、起搏和换气过度。

People with PCS may experience constant headaches, learning difficulties, and behavioral symptoms that even affect their personal relationships for months or years after the injury.

患有PCS的患者在伤后几个月甚至几年会出现持续头痛，学习障碍，和一些甚至影响到他们个人关系的行为问题。

Diagnoses will be made based on both behavioral symptoms and measurable brain activity.

将根据行为症状和可测量的大脑活动进行诊断。