psych 10-11 - -in the brain-GABA = most widely used

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October 11, 2007 Intro. to Psych. Dependence and Addiction -psychoactive drug: a chemical substance that alters perceptions and mood -effects consciousness -Dependence: absence of a drug may lead to a feeling of physical pain, intense cravings (physical dependence), and negative emotions (psychological dependence) -Addiction: a craving for a chemical substance, despite its adverse consequences -Withdrawal: upon stopping use of a drug (after addiction), users may experience the undesirable effects of withdrawal -continued use of a psychoactive drug produces tolerance -with repeated exposure to a drug, its effect lessens -takes more to feel the same Depressants: -drugs like alcohol, barbiturates, and opiates that calm neural activity and slow body fcn -alcohol -alcohol affects motor skills, judgment, and memory, and increases aggressiveness while reducing self awareness -barbiturate (tranquilizer) -depress activity of CNS, reducing anxiety but impairing memory and judgment -barbiturates work by enhancing the action of a neurotransmitter called GABA
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Unformatted text preview: -in the brain-GABA = most widely used neurotransmitter-opiates-stimulants-drugs that excite neural activity and speed up body functions-caffeine and nicotine:-both increase heart and breathing rates and other autonomic fcns to provide energy-amphetamines-stimulate neural activity, causing accelerated body functions-ecstasy-MDMA-stimulant and mild hallucinogen-produces a euphoric high and can damage serotonin-producing neurons, which results in a permanent deflation of mood and impairment of memory-cocaine-cocaine induces immediate euphoria followed by a crash-crack, a form of cocaine, can be smoked-can be sniffed/injected too-hallucinogens-hallucinogens are psychedelic drugs that distort perceptions/evoke sensory images in the absence of sensory input-LSD: powerful hallucinogenic drug that is also known as acid-THC: major active ingredient in marijuana that triggers a variety of effects...
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psych 10-11 - -in the brain-GABA = most widely used

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