Richard seems to vacillate between periods of extreme productivity and periods of deep depression. during his productive periods he sleeps little, feels good, and he talks a lot and very quickly. another way to describe richards productive periods might be:

Another way to describe Richard’s productive periods might be maniac episodes. A maniac episode occurs when an individual is likely to experience a period of having a high energy that is abnormal and that later may have a mood that is irritable that would last for days.