Forebrain circuits in the hypothalamus are important for the appetitive phase of feeding, while brainstem circuits are important for the consummatory phase.

“and the general thought is that these four brain circuits in the hypothalamus are more important particularly in hypothalamus but other parts of the forebrain as well are more important for the repetitive phase and the brain stem circuits are more important for the consummatory phase the actual putting it in your mouth and licking chewing swallowing and all that”