The Role of Pleasure in Behavior: A Symposium by 22 Authors

action activity addiction animal appears associated attention aversive avoidance behavior brain central cerebral changes chemical complex consistent continued cortex demonstrated dependence depression described direct dose drugs effects electrical stimulation electrodes emotional evidence evoked potentials experimental experiments extinction feelings fibers Figure function given HEATH human subjects hypothalamic implanted important increased indicated induced inhibition inhibitory injection intensity involved lateral learning lesions lever light mechanism medial forebrain Michigan midbrain monkey months morphine motivation neural nucleus observations obtained occurred OLDS operant operant behavior organism pain patients pattern period periventricular Physiol physiologic pleasure positive reinforcement possible present produced Psychol punishment reaction recording reflex relation reported response result reward self-stimulation sensory septal region shows sleep specific spike stimulation structures studies subjects suggest technic thalamus thought tion unit University wave yielded York