Brain scan Coloured Magnetic Resonance Imaging MRI scan through a human head showing a healthy brain in side view The face is seen in profile at left with tissues of the mouth nasal cavity and throat red visible The folded cerebrum blue at top makes up the larger part of the brain intelligent thought processes memory and conscious movement are processed in the cerebrum At centre orange is the elongated brainstem which controls involuntary reflexes like breathing and eye reflexes it connects with the spinal cord To the right of the brainstem is the cerebellum which is involved in body posture balance and coordination of movement