psych sleep disorders Flashcards
how long is a cycle of sleep?
approx every 90 min, NREM sleep alernates with REM sleep;
progression through NREM
results in slower brain wave patterns and hgiher arousal thresholds
REM sleep brain wave pattern
resembles the EEG of an aroused person
vivid dream recall
assoc with awakening from REM sleep
dysomnias
insufficient, excessive, or altered timing of sleep
parasomnias
unusual sleep-related behaviors
primary insomnia
difficulty initiaing sleep (sleep onset insomnia), freq nocturnal awakenings (middle of the night or sleep maintenance insomnia)early morning awakenings (late night or sleep offset insomnia); waking up feeling fatigued (nonrestorative sleep)
acute insomnia
between 1 and 4 weeks; usually assoc with stress and resolves spontaneously
chronic insomnia
more than 4 weeks; assoc with reduced quality of life and increased risk of psych illness
dsm criteria for dyssomnias
difficulty initiating or maintaining sleep or nonrestorative sleep for at least 1 mo
treatment for dyssomnias
sleep hygiene measures; CBT; benzos, non-benzo sedatives, antidepressants
benzos used for dyssomnias
reduce sleep latency and nocturnal awakening; side effects incl development of tolerance, addiction, daytime sleepiness, and rebound insomnia
non-benzos used for dyssomnias
zolpidem (ambien), eszopiclone (Lunesta), and zaleplon (sonata); effective for short-term treatment; assoc with low incidence of daytime sleepiness or orthostatic hypotension
zolpidem in the elderly
increased risk of falls and may induce cognitive impairment
antidepressants used for dyssomnias
trazadone, amitrytpiline, and doxepin (off-label use)
most prescribed sedating antidepressant for patients with chronic insomnia and depressive sx
trazadone
morning headaches
can be a sign of OSA
narcolepsy tetrad
excessive daytime sleepiness or seep attacks plus REM-related sleep phenomena incl inability to move during transition from sleep to wake, hypnagogic or hypnopompic hallucinations; or a sudden loss of muscle tone evoked by strong emotion
cataplexy
sudden loss of muscle tone evoked by strong emotion without loss of consciousness
cataplexy occurs in what percent of people dx with narcalepsy
60-80 percent
treatment for narcolepsy
daytime naps; get at least 8 hrs of sleep; pharm treatment may incl stimulants and antidepressants