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Your Brain On Drugs Lr
Your Brain On Drugs Lr
Your Brain On Drugs Lr
Your Brain On Drugs Lr
Your Brain On Drugs Lr
Your Brain On Drugs Lr
Your Brain On Drugs Lr
Your Brain On Drugs Lr
Your Brain On Drugs Lr
Your Brain On Drugs Lr
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Your Brain On Drugs Lr

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LeAnne's talking notes and slide ques.

LeAnne's talking notes and slide ques.

Published in: Health & Medicine
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  • 1.  CHANGE SLIDE  All addictive drugs produce their effects by altering the synaptic activity.  CHANGE SLIDE  Show video “World’s most dangerous drug”
  • 2.  CHANGE SLIDE  Humans engage in behaviors that are rewarding; pleasurable feelings provide positive reinforcement so that the behavior is repeated.  There are natural rewards and artificial rewards, such as drugs.  CHANGE SLIDE  Natural rewards reinforce behaviors required for survival. (food, water, sex, nurturing)
  • 3.  CHANGE SLIDE  The reward pathway is in the limbic system consisting of the nucleus accumbens, ventral tegmental area (VTA) and the prefrontal cortex.  The neurons of the VTA contain dopamine which is released into the nucleus accumbens and prefrontal cortex in response to natural or artificial reward stimuli.  CHANGE SLIDE  Stimulation of the reward pathway produces highly pleasurable sensations, providing positive reinforcement which promotes further drug use.
  • 4.  As Travis said: Addiction is a state in which a person engages in a compulsive behavior, even when faced with negative consequences.  The behavior is rewarded and reinforced via the reward pathway.  A major feature of addiction is the loss of control in limiting intake of the substance or behavior.  CHANGE SLIDE  Addiction is a chronic, relapsing disease resulting from fundamental changes in the brain.
  • 5.  When a substance is used repeatedly over time, tolerance may develop.  The brain adjusts its chemistry to offset the effects of the drug and tolerance develops.  CHANGE SLIDE  As tolerance develops, more of the drug is needed to produce the same effects.
  • 6.  Substance dependence develops when neurons adapt to repeated drug use and only function normally in the presence of the drug.  When dependency develops, the brain has become dependent upon the substance to function.  CHANGE SLIDE  Without the substance the user experiences withdrawal and intense cravings for the substance.
  • 7.  CHANGE SLIDE  It is possible to be dependent on a drug without being addicted. Although, if one is addicted they are most likely also dependent.  For example; A terminal cancer patient being treated with morphine for pain will experience withdrawal if the drug is stopped, but they are not a compulsive user of the drug therefore they are not addicted.
  • 8.  CHANGE SLIDE  Drug addicts and overeaters experience similar responses in the reward pathway.  Image of nucleus accumbens in the reward center: red=high dopamine receptors, yellow & green=lower dopamine receptors.  With less dopamine receptors a person has difficulty feeling joy.  Scientific studies have revealed that the brain activity of alcoholics and drug abusers is very similar to that of compulsive gamblers and overeaters.
  • 9.  Prolonged drug use causes the dopamine neurons in the reward pathway to cease functioning.  This state of dopamine deficiency causes the user to experience chronic feelings of anxiety, depression and an inability to just feel good.  CHANGE SLIDE  The person can only feel normal when under the influence of the drug.
  • 10.  Continued drug use causes long-lasting, even permanent, changes in the functioning of neurons.  CHANGE SLIDE  Long-term drug use alters the brain in fundamental and long-lasting ways. (normal brain vs. meth brain)  CHANGE SLIDE  Addiction is a disease of the brain.

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