AP Psychology Exam Notes: Sleep, Dreams, Brain Imaging, and Structures
Sleep and Dream Journey
Requirements for the Sleep and Dream Journal
Mandatory Physical Notebook: Must be a physical notebook, not on a computer or phone. Binders are acceptable.
Keep at Home: The journal should remain at home unless specifically instructed to bring for a Dream Therapy Group.
Submission: The journal will be turned in after two weeks, on a specific day the instructor will announce multiple times.
Grading: Worth points; part of the research grade as it involves self-research and analysis of sleep patterns, including comparison to class averages.
Daily Entries: Each day's entry must start on a new page (front and back of a single page is acceptable, but not multiple days on one side). This reflects the psychological idea of each night being a fresh start.
Date: Must include the date. The first date for monitoring is Friday, September 19th (the current day of the lecture).
Time Went to Bed (Estimate): Filled out the next day (e.g., Saturday for a Friday night entry) as one might not fall asleep immediately. Estimation is acceptable (e.g., "around P.M.").
Time Woke Up: Record the actual time one gets out of bed, not after hitting snooze. Easy if using an alarm.
Duration of Sleep: Calculate the total hours of sleep (e.g., to = ).
Problems Going to Sleep & Inducements: Note any difficulties falling asleep (e.g., anxiety, noise) or if specific dream inducements (visual, auditory, smell, touch, taste related to the five senses) were used. Inducements will be announced by the instructor at a later date, and there will be five total.
Dreams: Record any remembered dreams or just facts about having dreamt. A "dream story" or analysis not expected on the first night.
Sleep Environment: Do not change regular sleep routines (e.g., listening to thunderstorm sounds). The dream journal and a writing tool (pen/sharpened pencil) must be kept right by the bed for immediate recording upon waking.
Commonly Asked Questions & Instructor Clarifications
Forgetting Dreams: It's okay not to remember dreams, but you still must analyze your sleep pattern and complete the journal nightly.
Journal Location & Writing Tool: Right next to your bed with a functional pen/pencil.
Writing Immediately: Write down dreams right away upon waking. Do not wait (e.g., until after breakfast) as dreams are easily forgotten.
Uncomfortable Dreams: Do not write down dreams that are sexual, inappropriate, or make you uncomfortable. Simply note, "Yes, I dreamt, but I don't feel comfortable sharing this." These dreams still have meaning for self-analysis (as Freud suggested, a good percentage are sexual in nature), but not for this class.
Weekend Monitoring: Yes, sleep must be monitored on weekends. Missing weekend entries will result in lost points.
Daily Monitoring (not just Inducements): The journal is every night, not just when dream inducements are given.
Estimating Sleep Time: If unsure, guess (e.g., "I think it was "). Sleep monitoring apps/devices (phone, watch, Ring, bed sensors) can provide accurate data.
Losing Points: Points are lost for not having an entry for a day or not starting a new page for each day's entry.
Sharing Dreams: You do not have to share dreams, but participation in the Dream Therapy Group is encouraged and can earn extra credit. Recurring dreams or vivid dreams from childhood are welcome for analysis.
Naps: Napping can be monitored if it's a regular occurrence and lasts minutes or more (a full sleep cycle), as dreams can occur during such naps. Record it as part of the daily entry.
Duration of Monitoring: Two weeks.
Significance of Dreams & Influencing Dreams
Dream Research: Many researchers note that we spend about years of our lives dreaming, making it worth paying attention to.
Dreams as Reminders: Recurring dreams can serve as reminders or signals your mind is sending.
Remembering Dreams: Intent plays a role; telling yourself you will remember your dreams can influence recall.
Influencing Dream Content: The type of dreams can be influenced by the last things seen or done before bed. Avoid horror movies, depressing news, or crime shows to prevent nightmares. Recommend watching something funny or enlightening instead.
Mental Clocks: Some cultures (e.g., Chinese) use mental clocks, waking up at a desired time without an alarm, suggesting the mind's influence on sleep-wake cycles (e.g., the "Amityville Horror" and "Weapons" movie examples).
Dream Inducements: Thinking about something enough can lead to dreaming about it, which is the basis for dream inducements.
Sleep Disorders (AP Curriculum)
Insomnia: Difficulty falling or staying asleep.
Narcolepsy: Falling asleep at inopportune times.
Sleep Apnea: Temporary cessation of breathing during sleep.
Somnambulism (Sleepwalking Disorder): Walking or performing complex behaviors while asleep. Can be dangerous (e.g., shoveling while asleep, legal defense in crime cases).
Sleep Eating Disorder: Waking up and eating unusual foods (e.g., cat food, frozen pizza, mayonnaise-covered items) without memory of it. Often associated with sleepwalking, leading to unexplained weight gain.
Tools of Discovery (Studying the Brain)
General Methods
Lesion: Physical destruction or cutting out of brain tissue, often due to disease, trauma (e.g., stroke), surgery, or experimentation. Leads to an absence of the function once performed by that brain part.
Examples: Lesioning a cat's amygdala eliminated fear/aggression. Lesioning a rat's lateral hypothalamus caused incessant eating and death from obesity (to study the "feeling full" mechanism).
Stimulation: Activating brain regions.
Electrical (ECT - Electroconvulsive Therapy): Patient is knocked out, brain is stimulated with electricity for severely depressed patients.
Chemical: Administering drugs (e.g., antidepressants) to affect brain chemistry.
Magnetic (rTMS - Repetitive Transcranial Magnetic Stimulation): Magnets target deeper brain parts to activate areas that are underactive in depression.
Brain Imaging Techniques
EEG (Electroencephalogram):
Function: Measures electrical brain activity (brainwaves).
Application: Used in sleep studies to observe REM/non-REM sleep and differentiate alpha vs. delta waves. Monitors brain activity (e.g., during responses to questions).
Experience: Wires attached to the scalp, can be challenging to sleep during a sleep study.
CT Scan (Computed Tomography) / CAT Scan:
Function: Uses X-rays to create a structural image of the brain.
Purpose: Primarily to look for structural damage. Often the first diagnostic tool used.
Key Concept: Right eye processes information sent to the left brain and crosses over; left eye to the right brain and crosses over. The right brain controls the left side of the body, and the left brain controls the right side of the body (e.g., stroke affecting left arm indicates right brain damage).
PET Scan (Positron Emission Tomography):
Mnemonic: "My PET loves sugar/candy."
Function: Injects a radioactive form of glucose. Measures brain activity by showing where glucose is absorbed (brain cells absorb glucose for energy).
Purpose: Identifies areas of deficiency or high activity during specific tasks.
Examples: Shows differences in brain activity (red = high activity) between normal brains, mild cognitive impairment, and early Alzheimer's. In Alzheimer's, significant gaps in activity are seen, and the brain mass can reduce from to .
MRI (Magnetic Resonance Imaging):
Function: Uses magnetic fields and radio waves to produce detailed computer-generated images of soft tissue.
Purpose: Provides highly detailed images, often used when CT scans don't show enough detail. More expensive than CT scans.
Experience: Patients lie in a tight, noisy tube; often causes claustrophobia. Movement can distort images.
Examples: Detailed pictures of brain structure. Can reveal differences, e.g., larger ventricle caps in a twin who developed schizophrenia compared to their identical twin (connecting to the diathesis-stress model).
MEG (Magnetoencephalography):
Function: Measures magnetic fields generated by the brain's natural electrical activity.
Purpose: Pinpoints electrical activity with high precision (e.g., used to identify brain activity during creative processes, like STING composing music, localizing activity in corpus callosum, right/left brain hemispheres).
Relationship to MRI: Combines detailed structural imaging of MRI with measurement of electrical activity.
fMRI (Functional Magnetic Resonance Imaging):
Function: Another highly detailed MRI-based technique that analyzes blood flow in the brain.
Purpose: Shows which brain regions are active during specific tasks by detecting changes in blood oxygenation.
Examples: If the occipital lobe (responsible for vision) shows active blood flow, the person might be watching a movie.
Note: These are the primary brain imaging techniques required for the AP curriculum.
Brain Structures
The Inner Brain (Reptilian Brain)
Evolutionary Basis: Considered the oldest and innermost part of the brain, representing the earliest stage of human brain evolution, shared with reptiles. Essential for survival.
Drawing: Usually requires distinct colors for different regions.
Components:
Medulla:
Location: Most vital part of the inner brain.
Function: Controls heartbeat and breathing.
Significance: Damage is life-threatening.
Pons:
Location: Sits above the medulla.
Function: Helps coordinate movements (especially with the cerebellum). Involved in sleep and dreams.
Activation-Synthesis Theory of Dreams: Suggests that dreams result from the pons randomly firing signals to different parts of the cerebral cortex, which then weaves these signals into a story.
Reticular Formation:
Location: Net-like structure extending from the spinal cord to the thalamus.
Function: Controls arousal from sensory neurons; draws attention to changes in the environment (e.g., a loud bang, a jump scare). Controls consciousness and awareness.
Significance: Damage can lead to unconsciousness or a coma (e.g., the story of the coma patient waking up after being yelled at).
Thalamus (Sensory Switchboard):
Location: At the top of the brainstem, but not technically part of the inner brain itself.
Function: Acts as the brain's sensory switchboard, directing sensory information (except smell) to the correct processing areas in the cerebral cortex (e.g., visual input to the occipital lobe, touch to the somatosensory cortex).
Exception: Smell is a chemical sense processed differently, not through the thalamus.
Midbrain: A small portion that connects the hindbrain to the forebrain, located between the pons and the thalamus.
The Hindbrain
Components: This division includes the medulla, pons, reticular activating system (reticular formation), and the cerebellum.
Cerebellum (Little Brain)
Location: Sits at the back of the brain, beneath the thalamus, often drawn like "rabbit ears" or "buns" on either side of the brainstem.
Latin Meaning: "Little brain."
Function: Crucial for muscle memory, skill memory, and coordination of voluntary movement.
Applications: Used daily in sports, playing instruments, typing. It re-trains for new physical skills (e.g., learning a golf swing).
Significance: Damage leads to difficulties with coordination and movement (e.g., a hypothetical student injured in a bus accident having coordination issues would suggest cerebellar damage).
Distinction: Cerebellum is primarily linked with coordination, while the pons is linked more specifically with sleep and dreams and movement coordination but is less likely to be the sole answer for specific coordination issues.
The Limbic System (First Floor)
Evolutionary Basis: Developed in more "intelligent" animals, such as pets (dogs), representing our emotional center.
Location: At the border (limbus) between the older inner brain structures and the newer cerebral hemispheres.
Mnemonic for Components: "H.A.H." (Hypothalamus, Amygdala, Hippocampus)
Components:
Hippocampus:
Appearance: Blue, seahorse-shaped (Latin for seahorse).
Function: Involved in memory formation.
Amygdala:
Appearance: Purple, almond-shaped cluster of neurons.
Function: Most discussed part of the limbic system. Primarily involved in processing emotions like aggression and fear.
Significance: Damage can eliminate fear or aggression (as seen in the cat amygdala lesion experiment), which can be detrimental as fear and aggression are also survival mechanisms.
Connection: Interaction with the frontal lobe to control fear responses (e.g., Navy SEAL training to control the amygdala).
Hypothalamus:
Appearance: Green, p-like structure.
Function: Regulates many bodily functions (e.g., hunger, thirst, body temperature). Crucially, it controls the pituitary gland, which is the master gland of the endocrine system.
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