(a) The hindbrain has three regions: the pons, the cerebellum and the medulla.
The pons take part in regulating the respiration.
The cerebellum helps in maintaining posture and balance of the body.
The medulla controls various involuntary actions such as the heart beat, breathing, blood pressure and peristaltic movements of the alimentary canal.
(b) The cerebrum is the logical part of the brain. It is the site of our faculties such as learning, reasoning, intelligence, personality and memory. All of our thoughts, sensations, actions and movements are controlled by the cerebrum.