Final answer:
The neural region involved in controlling drinking is the median preoptic nucleus, located in the hypothalamus which is connected to the limbic system by the medial forebrain bundle.
Step-by-step explanation:
The region of the brain in front of the anterior commissure that is sensitive to information from the subfornical organ and which communicates with motor neurons controlling drinking is the median preoptic nucleus. This region is situated within the hypothalamus, a vital forebrain structure that regulates a multitude of homeostatic processes, including the autonomic nervous system and the endocrine system. The hypothalamus is deeply connected with the limbic system, a collection of structures that process emotion and memory, such as the amygdala, septal nuclei, and the olfactory cortex, all of which provide input through the medial forebrain bundle.