BIOB38H3 Lecture Notes - Lecture 10: Psychoactive Drug, Papaveraceae, Erythroxylaceae
27 Oct 2016
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Lecture 10: plants that hook the mind and body. It the outcome of an action is good, we will keep doing it. If the outcome of an action is not good, we will stop doing it. Reward system: sends signals whether we like something or we want something, separate systems for liking and wanting. Like signals: centered in the forebrain, at a more primitive part in the brain stem. Want signals: generating in the mesolimbic tract, core of the brain. For most substances, there is an overlapping of want and like, but there is no overlapping for drugs. Physiological dependence: body has a need for the drug to avoid withdrawal symptoms. Tolerance: need for ever-increasing amounts to produce same effect. Alkaloids: majority of psychoactive drugs (except weed, common in. Psychoactive drugs: mimic, increase, or decrease action of neurotransmitters. Neurotransmitters: dopamine, epinephrine (adrenaline, serotonin, glutamate, norepinephrine (noradrenaline, acetylcholine.
