PSYCH 104 Midterm 2 (sleep and drugs) Flashcards
- Circadian rhythm
- Circadian rhythm
○ Cyclical changes that occur on a roughly 24 hour basis in many biological processes.
§ Regulated by the suprachiasmatic nucleus (SCN)
□ Located in the hypothalamus
□ Brains “biological clock”
□ Pineal gland releases a hormone melatonin
How much sleep do we need?
An average person requires about 7-10 hours of sleep a night
Amount of sleep needed depends on
○ Amount of sleep needed depends on
§ Age
§ Health
§ Quality of sleep
§ Genetics
§ Species
○ Sleep deprivation can result in
○ Sleep deprivation can result in
§ Difficulties learning
§ Poor attention
§ Lethargy
○ Sleep deprivation is associated with various adverse health outcomes
○ Sleep deprivation is associated with various adverse health outcomes
§ Weight gain
§ Diabetes
§ Heart problems
§ Weakened immune systems
Stages of sleep
- Awake and alert:
- Awake and alert:
○ Beta waves = over 13 per second
Stages of sleep - Calm wakefulness
- Calm wakefulness
○ Alpha waves = 8-12 waves per second
Stages of sleep - Stage 1:
- Stage 1:
○ Theta waves (4-7 per second
○ Myoclonic jerks
○ Hypnagogic imagery
Stages of sleep - Stage 2:
- Stage 2:
○ Sleep spindles
§ Short bursts of neural activity
○ K-complexes
§ A large waveform that occurs intermittently
Stages of sleep - Stage 3 & 4
- Stage 3 & 4
○ Delta waves 1-2 per second
○ Stage 3: less than 50% are delta
○ Stage 4: more than 50% are delta
○ “deep sleep” required for feeling well rested
○ Time spend in deep sleep declines with age
Stages of sleep - Stage 5 (REM sleep):
- Stage 5 (REM sleep):
○ Rapid eye movement (REM)
§ Darting of the eyes under closed eyelids durring sleep
○ REM sleep
§ Stage of sleep during which the brain is most active and during which vivid dreaming most often occurs
□ Approx. 20% of sleep is REM sleep
□ Rebounds when REM sleep is lost
Why do we sleep?
Why do we sleep?
- Energy conservation
- Adaptive for avoiding predation
- Restorative (body has a chance to heal)
Insomnia (What is it?)
Insomnia:
- Difficulty falling and staying asleep
○ Regularly raking more than 30 minutes to fall asleep
○ Waking too early in the morning
○ Waking up during the night and having trouble returning to sleep
○ Factors such as age, drug use, exercise, mental status and bedtime routines can contribute to insomnia
Insomnia (Treatment Behavioral)
○ Make sure you have a consistent wake schedule
○ Go to bed only when you are tired
§ If you are in bed and not sleeping get out of bed
○ Only use your bed for the purposes of sleeping
○ Exercise regularly
○ Avoid drugs like alcohol and caffeine in the evening
Insomnia (Treatment Pharmacological)
○ Can be addictive
○ Have adverse effects
○ Can lead to rebound insomnia
Narcolepsy (What is it?)
Narcolepsy
Disorder characterized by an irregular control of wake sleep cycles
Narcolepsy (Symptoms?)
- Symptoms:
○ Sleep attacks
○ Cataplexy: lose voluntary control of muscles but are awake
§ Triggered by strong emotions
○ Hypnagogic (sleep onset) and hypnopompic (sleep offset) hallucinations
○ Sleep paralysis: when we cant move but are conscious
○ Disturbed nighttime sleep
Narcolepsy (Causes and treatment)
- Possible causes
○ Insufficient hypocretin producing neurons in the hypothalamus - Treatment
○ Stimulants
Behavioral strategies
(Obstructive) sleep apnea (What is it?)
(Obstructive) sleep apnea
- Disorder caused by a blockage of the airway during sleep, resulting in daytime fatigue
(Obstructive) sleep apnea (What can it cause and treatment?)
- Creates health problems:
○ Night sweats
○ Weight gain
○ Hearing loss
○ Irregular heartbeat
○ Raises risk of death - Treatment
○ Weight loss
○ CPAP air mask