[Relation between the brain and the endocrine system in their chronobiological aspects. I. The brain, hypothalamus and pineal body].

In this communication are interactions between the cerebrum, especially the hypothalamus and the pineal under chronobiological aspects described. The level of biogenic amines (noradrenaline, serotonin and histamine) provoced biorhythms. This biorhythms influence endocrine organs in their activity.