PSYC62H3 Lecture Notes - Homeostasis, Drug Metabolism, Mesolimbic Pathway
Document Summary
Lecture 4: tolerance, sensitization, dependence, and addiction (chapter 6) Would take away a pleasant experience would be rewarding. Positive emotional, pleasurable, makes us feel good, gives us an incentive. Leads to an reward, behaviour will be repeated in the future. The consequence will increase the positive reinforcement. Something neutral will repeated and associated with unconditioning. Different types of rewards: natural rewards, e. g. , food, water, sex, nurturing, have some sort of evolutionary or adaptive, artificial rewards, e. g. , drugs, money (gambling, do not play an adaptive role for the organism but can strong control behavior. Both these rewards act on the same brain mechanisms. Discovered that electrical stimulation of certain areas of the brain was rewarding and reinforcing: olds and milner were scientists at mcgill and established the reward mapping in rodents. Brain stimulation reward: they learned that there were a whole of regions that the rat learned to press the lever for (reward sites)
