Altered States of Consciousness Flashcards
(31 cards)
Psychoactive drug
A chemical substance that alters perceptions and moods - wide variety
Types of Psychoactive Drugs
Stimulants, Depressants, and Hallucinogens
Psychoactive drugs work by altering
synaptic transmission (stimulating, inhibiting, and or mimicking neurotransmitters)
Stimulants…
excite neural activity - speed up body functions
(Heart rate, breathing, pupil dilation, increase energy) can lead to “crash” after use
Caffeine, Nicotine, Cocaine, Ecstasy and Methamphetamines are …
stimulants.
Alcohol, Opioids, and Barbituates are…
depressants.
Depressants…
reduce neural activity and slow body functions
Hallucinogens…
distort perceptions - may generate sensory images in the absence of sensory input
Cannabis…
slows down reaction time, messes with time perception, more senseitive to colors and sounds - Marijuana is a spanish word and was used to associate the plant with Mexican immigrants
LSD…
Chemically similar to a form of serotonin - can generate intense emotional experiences that can be either positive or negative
DMT…
naturally occuring psychoactive chemical - can be extracted from certain plants - subjective effects
Psychological Dependence
absence of drug causes negative emotions
(but not physical symptoms)
Physical Dependence
absence of drug causes physical pain, intense
cravings, sign of physical illness
Dependency (Addiction)
Physical and or Psychological
Tolerance
The drugs effect lessens as the brain adapts - takes larger doses to produce same effect
Withdrawal
The discomfort of drug leaving the system, occur even without addiction
Operant Conditioning
Behaviors that are positively reinforced are repeated
Addictive drugs act on reward system in the brain
Rewards system is tricked by drugs - body gets rewarded even if effects are detrimental
Wanting system in the brain
Cravings - motivation and pursuit of a reward
Liking system in the brain
Hedonic pleasure from a reward
Different neural systems for liking versus wanting
Addictive drugs hyper-sensitize “wanting” centers of brain, but de-sensitize the
”liking” centers)
* Leads to chronic cravings for the drug, but the drug no longer feels good
Drug abuse is a…
modern disease
Common causes of hallucinations
hallucinogenic drugs, mental illness, extreme duress (sleep deprivation, starvation, illness), ritualized behavior (chanting, deep meditation), sensory deprivation
Hallucinations
sensory experiences not caused by environmental stimuli - may involved any of the senses,