Chapter 3 PSYCHOACTIVE DRUGS.

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Presentation transcript:

Chapter 3 PSYCHOACTIVE DRUGS

HALLUCINATIONS Def.: false perceptions with no external stimulation Created by Sensory deprivation  brain creates own stimulation if not enough in the environment (imaginary friends, seclusion, solitary confinement) Or too much stimulation causes it (schizophrenia)

HALLUCINATIONS & DRUGS LSD, alcohol, opium, caffeine, etc can create psychoactive hallucinations Impairs judgment & emotion-based brain mechanisms Most widely abused: marijuana, cocaine, heroin, & amphetamines

PSYCHOACTIVE DRUG CATEGORIES (1) HALLUCINOGENS/ PSYCHEDELICS: ex, PCP (“angel dust”) user feels disembodied & insensitive to pain; Shrooms; LSD ; Marijuana

PSYCHOACTIVE DRUG CATEGORIES (2) OPIATES: highly addictive drugs; suppress sensation & response to stimulation Morphine & codeine: pain-relieving properties like body’s own endorphins Heroin is made from morphine & 1st developed by Bayer Co.  rush of euphoria & addiction starts from 1st use!!

PSYCHOACTIVE DRUG CATEGORIES (3) DEPRESSANTS: slow down mental & physical activity by inhibiting CNS Barbiturates, anti-anxiety meds, & alcohol  all actually reduce REM-sleep, so still tired despite full nights rest! Overdoses cause loss of all sensations, coma, or death Alcohol one of 1st psychoactive drugs used by humans  now 1 in 10 Americans suffer from alcoholism

PSYCHOACTIVE DRUG CATEGORIES (4) STIMULANTS: speed up mental & physical rates of activity & increases CNS activity  Used for ADHD & narcolepsy Cocaine users want higher pleasure sensations & greater energy and awareness; heavy users experience hallucinations

Natural Stimulants

BUT ARE THEY DRUGS? Physiological Dependence: process by which the body adjusts to, and becomes dependent on, a drug Two other stimulants: caffeine & nicotine…do you think they are drugs??

BRAIN GAMES: ADDICTION