PSYC 100 Lecture Notes - Lecture 22: Substance Intoxication, Psychoactive Drug, Schizophreniform Disorder

• School: Queen's University
• Department: Psychology
• Course: PSYC 100
• Professor: Jordan Poppenk

Document Summary

A chemical substance that acts on the central nervous system, where it affects brain function, resulting in changes to a person"s emotions, perceptions, and thoughts. Street drugs, commonly ingested substances such as alcohol and prescription medication, and other common substances such as fuel or paint. Describe the four sets of criteria for a substance use disorder. Impaired control, social impairment, and risky use, and meets pharmacological criteria. Substance use disorders are characterized as mild (two or three criteria met), moderate (four or five criteria met), or severe (six or more criteria met). Substance intoxication occurs when a person suffers clinically significant negative or harmful behavioural changes or psychological effects because of the influence of a psychoactive substance. Substance withdrawal occurs when a person suffers clinically significant negative or harmful behavioural changes or psychological effects because they recently stopped prolonged use of a psychoactive substance.