Pathological euphoria

Euphoric: Although the patient is often happy, and also seems to be very satisfied and happy experience, but because of the mental retardation, even if the patient is very happy at this time, his facial expressions feel dumb and stupid. At the same time, the patient himself did not know the reason for the happiness, the content performance was more monotonous and stereotyped, so it was difficult to resonate with normal people, and it was not contagious.