Brain

The brain is a complex system of interconnected Neurons resulting in complex behavior in cognitive systems. The study of the electrical impulses of the brain is called Neuroscience, the systems level study of the brain is known as Cognitive Science, the study of the resulting behavior in organisms is called Behavioral Science, and finally the study of human behavior (and then associated treatment) is called Psychology.

(Roy et al. 2018) (Chalmers 1995)