PSYC 1010 Chapter Notes - Chapter 10: Psychoactive Drug, Sympathetic Nervous System, Methamphetamine

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Rebecca Jubis

Document Summary

Substance use disorder: substance craving & use despite signi cant life disruption & physical risk. Psychoactive drug: chemical substance that alters perception & moods. (stimulate[stimulants], inhibit[depressants], or mimic [hallucinogens] brain"s own neurotransmitters) Tolerance: diminishing effect of drug after regular use,requiring larger doses to experience effect again. (brain chemistry adapts to offset drug effect - neuroadaptation) Addiction: compulsive craving of drugs/behavior despite known adverse effects. Withdrawal: discomfort & distress after discontinuing addictive drug/behavior. Depressants: alcohol, tranquilizers, opiates - reduce neural activity & slow bodily functions. Slowed neural processing: slow sympathetic nervous system, slow speech, poor performance, slow reactions & poor judgments (driving drunk). Memory disruption: disrupt memory formation, not remembering after blackout due to suppression of rem sleep that helps with forming memories, long term effects reduces birth of new nerve cells. Alcohol use disorder/alcoholism: prolonged excessive drinking - usage marked by tolerance. Can shrink brain, & damage lung&liver (more in women due to lower alcohol digestive stomach enzyme)