cerebrum: seat of mental abilities, controls thinking, memory, reasoning, perception, emotion and speech
diencephalon: it acts as relay centre for sensory impulses and reflects centre for muscular activities. it is the centre for motions and centre for water balance, blood pressure, body temperature, sleep and hunger
mid brain: it relays motor impulses from the cerebral cortex to the spinal cord and relay sensory impulses from the spinal cord to the thalamus, reflex for sight 
cerebellum: maintains posture, equilibrium and muscle tone and coordinates voluntary movements initiated by cerebrum
medulla oblangata: centre for cardiac, respiratory and vasometer activities
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