Module 9 Q & A
Why might alcohol make a person more helpful or more aggressive?
Alcohol is a disinhibitor—it makes us more likely to do what we would have done when sober, whether that is being helpful or being aggressive.
What are depressants, and what are their effects?
Depressants, such as alcohol, barbiturates, and the opiates, dampen neural activity and slow body functions. Alcohol tends to disinhibit, increasing the likelihood that we will act on our impulses, whether harmful or helpful. It also impairs judgment, disrupts memory processes by suppressing REM sleep, and reduces self-awareness and self-control. User expectations strongly influence alcohol's behavioral effects, and alcohol use disorder is marked by tolerance, withdrawal, and a drive to continue problematic use.
What are hallucinogens, and what are their effects?
Hallucinogens—such as LSD and marijuana—distort perceptions and evoke hallucinations—sensory images in the absence of sensory input. The user's mood and expectations influence the effects of LSD, but common experiences are hallucinations and emotions varying from euphoria to panic. Marijuana's main ingredient, THC, may trigger feelings of disinhibition, euphoria, relaxation, relief from pain, and intense sensitivity to sensory stimuli. It may also increase feelings of depression or anxiety, impair motor coordination and reaction time, disrupt memory formation, and damage lung tissue (when inhaled).
Why do tobacco companies try so hard to get customers hooked as teens?
Nicotine is powerfully addictive, and those who start paving the neural pathways when young may find it very hard to stop using nicotine. As a result, tobacco companies may have lifelong customers. Moreover, evidence suggests that if cigarette manufacturers haven't hooked customers by early adulthood, they most likely won't.
How does this pleasure-pain description apply to the repeated use of psychoactive drugs?
Psychoactive drugs create pleasure by altering brain chemistry. With repeated use of the drug, the brain develops tolerance and needs more of the drug to achieve the desired effect. (Marijuana is an exception.) Discontinuing use of the substance then produces painful or psychologically unpleasant withdrawal symptoms.
Long-term use of Ecstasy can...
damage serotonin-producing neurons.
Use of marijuana
impairs motor coordination, perception, reaction time, and memory.
An important psychological contributor to drug use is
the feeling that life is meaningless and directionless.
How has the concept of addiction changed?
Psychologists debate whether the concept of addiction has been stretched too far, and whether addictions are really as irresistible as commonly believed. Addictions can be powerful, and many with addictions do benefit from therapy or group support. But viewing addiction as an uncontrollable disease can undermine people's self-confidence and their belief that they can change. The addiction-as-disease-needing-treatment idea has been extended to a host of excessive, driven behaviors, but labeling a behavior doesn't explain it. The concept of addiction continues to evolve, as psychiatry's manual of disorders now includes behavior addictions such as "gambling disorder" and proposes "Internet gaming disorder" for further study.
Why do some people become regular users of consciousness-altering drugs?
Some people may be biologically vulnerable to particular drugs, such as alcohol. Psychological factors (such as stress, depression, and hopelessness) and social factors (such as peer pressure) combine to lead many people to experiment with—and sometimes become addicted to—drugs. Cultural and ethnic groups have differing rates of drug use. Each type of influence—biological, psychological, and social-cultural—offers a possible path for drug misuse prevention and treatment programs.
What are stimulants, and what are their effects?
Stimulants—including caffeine, nicotine, cocaine, the amphetamines, methamphetamine, and Ecstasy—excite neural activity and speed up body functions, triggering energy and mood changes. All are highly addictive. Nicotine's effects make the use of tobacco products a difficult habit to kick, but the percentage of Americans who use them continues to decrease. Cocaine gives users a fast high, followed within an hour by a crash. Its risks include cardiovascular stress and suspiciousness. Use of methamphetamines may permanently reduce dopamine production. Ecstasy (MDMA) is a combined stimulant and mild hallucinogen that produces euphoria and feelings of intimacy. Its users risk immune system suppression, permanent damage to mood and memory, and (if taken during physical activity) dehydration and escalating body temperatures.
What are substance use disorders, and what roles do tolerance, withdrawal, and addiction play in these disorders?
Those with a substance use disorder may exhibit impaired control, social disruption, risky behavior, and the physical effects of tolerance and withdrawal. Psychoactive drugs are any chemical substances that alter perceptions and moods. They may produce tolerance—requiring larger doses to achieve the desired effect—and withdrawal—significant discomfort accompanying attempts to quit. Continued use may lead to addiction, which is the compulsive craving of drugs or certain behaviors (such as gambling) despite known adverse consequences.