>All elementary psychology clases cover these experiments quite thoroughly.
>They are very famous and are the basis for many sub-fields of neuroscience.
>The original rat experiment was done by B.F. Skinner in the 50s and was
>called "the skinner box." The implant was an electrode which was put into
>the rat's hypothalamus (pleasure center of the brain which controls
>sensations from eating, sleeping, sex). When an electrical stimulus was
>provided by the subject, (in this case a lever the rat presses) the
>interesting thing they noted was that the animal couldnt get enough
>pleasure -- in other words they couldnt be satiated by the amount of
>pleasure.
http://www.biozentrum.uni-wuerzburg.de/genetics/behavior/learning/SkinnerBox .html
-- T.R. Fullhart | VetMed Multimedia, KSU email: trf2020@ksu.edu | Whirligig magazine web: http://www-personal.ksu.edu/~trf2020/ | Swillhound Studios