Old McScientist had a brain with many neurons in it.
And in that brain he had a cerebrum to help him make decisions.
Cerebrum here, Cerebrum there, Cerebrum Cerebrum everywhere.

Old McScientist had a brain with many neurons in it.
And in that brain he had a cerebellum to help him keep his balance.
Cerebellum here, Cerebellum there, Cerebellum, Cerebellum everywhere.
 

Old McScientist had a brain with many neurons in it.
And in that brain he had a Brain Stem to keep his heart a beatin'.
Brain Stem here, Brain Stem there, Brain Stem Brain Stem everywhere.
 

Old McScientist had a brain with many neurons in it!