4.4 Sleep Problems and Disorders — When Your Brain Betrays You at Night | Psychology 2e
After this lesson you will be able to…
- Understand how synthetic chemicals like caffeine hijack the brain's natural systems.
- Learn that drugs don't create new sensations but exploit existing cellular machinery.
- Define substance use disorder, focusing on compulsion and the biological process of tolerance.
- Explain withdrawal as the brain's severe rebound effect when a substance is removed.
- Differentiate between physical dependence (tolerance/withdrawal) and psychological dependence.
- Understand how depressants like alcohol hyperpolarize neurons by enhancing GABA's inhibitory effects.
- Learn why withdrawal from depressants is medically dangerous due to the brain's compensatory overdrive.
- Understand how alcohol acts as a teratogen, causing permanent damage to a developing fetus.
- Introduce stimulants as drugs that cause a 'power surge' by largely hijacking the dopamine system.
- Explain how cocaine causes euphoria by blocking dopamine reuptake in the synapse.
- Describe how amphetamines aggressively force dopamine release and reverse re-uptake.
- Resolve the paradox of using stimulants to treat hyperactivity in ADHD by explaining neuroanatomy.
- Examine the devastating physical and psychological consequences of methamphetamine abuse.
- Explain how caffeine acts as an adenosine antagonist, blocking sleepiness without providing energy.
- Understand how opioids mimic the body's natural pain relief system but with overwhelming power.
- Trace the opioid crisis to pharmaceutical companies' false claims and over-prescription in the 1990s.
- Describe the severe symptoms of opioid withdrawal and how it traps users in a psychological cycle.
- Explain how tighter prescription controls led to a black market and the rise of fentanyl overdoses.
- Learn how Naloxone reverses opioid overdoses by aggressively ejecting hijacking chemicals.
- Explore hallucinogens' varied biological mechanisms and their profound alteration of sensory perception.
- Discuss marijuana's recognized medical applications and the scientific roadblocks caused by federal classification.
- Examine the historical tension between federal and state laws regarding marijuana and its broader implications.
- Summarize the brain's vulnerability to chemical exploitation and pose an ethical question about synthetic joy.
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(0)This lesson dives into the science of sleep disorders, covering why 30–50% of people struggle with sleep at some point in their lives. From the self-p...
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Quiz: Psychoactive Drugs and the Brain's Natural Systems
FundamentalsAnswer each question based only on what was covered in the video lesson. No outside knowledge is required — all answers can be found in the content you just watched.
Practice: Neuropharmacology and Psychoactive Drug Mechanisms
PracticeAnswer each question using what you learned in the video lesson. Questions progress from basic recall to deeper conceptual application — read each stem carefully before responding.