Dr. Williamson most likely to be studying "hypothalamus".
The hypothalamus is a little locale of the brain. It's situated at the base of the mind, close to the pituitary gland.
While it is very little, the hypothalamus assumes a pivotal part in numerous critical capacities, including discharging hormones, directing body temperature, keeping up day by day physiological cycles, controlling craving, overseeing of sexual conduct and controlling enthusiastic reactions.