Main Functions:
(A)    Fore-brain: (i) It has regions which receives sensory impulses from various receptors. Based upon information and information stored in the brain, it make a decision how to respond. The information is passed on to motor areas which control movement of voluntary muscles such as our leg muscles.
(ii) It is the site of intelligence and judgement.
(iii) It controls intellect, speech, language, hunger and the spinal senses.

(B)    Mid-brain:
(i) It controls the reflex action of right, such as change in the size of pupil, hearing and of balance. Thus, it controls such involuntary action.

(C)    Hind-brain:
(i) It controls involuntary actions such as blood pressure, salvation, and vomitting.
(ii)    It regulates the voluntary movement of skeletal muscles (motor activities) to maintain the posture and balance of the body. This controlled cerebellum, a part hind-brain. It controls activities such as walking in a straight line, riding a bicycle, picking up a pencil etc.
(iii)    Medulla oblongata controls life activities such as respiration and circulation.