Flashcards in 8: Sleep Deck (49)
What is sleep?
A periodic, natural reversable behavioural state of disengagement to the environment
What kind of sleep do dophins have?
Unihemispheric sleep so the hemispheres take turns - allows them to still swim to the surface for oxygen
How does our awareness when asleep change with age?
Children are less easily woken
What is alpha activity?
Associated with rest and sleep
What is beta activity?
Associated with alertness
What waves are seen in stage 1 of sleep?
What waves are seen in stage 2 of sleep?
Sleep spindles and K-complexes
What are sleep spindles?
Bursts of activity seen in stages 2 and 3 of sleep
What are k-complexes?
Negative potentials seen in stage 2 of sleep
What waves are seen in stage 3 of sleep?
What happenes to the number of spindles as we move from stage 2 into stage 3?
What waves are seen in stage 4 of sleep?
What sleep stages are characterized as 'slow wave'?
3 and 4
What is REM sleep?
Brain activity varies, we have sleep paralysis and dreaming
Why do we need sleep?
Why is sleep important for restoration?
It allows us to restore homeostasis and clear toxic waste products much faster
It's a short period of rest for all neurons
Why is sleep important for adaptation?
We can't see well at night so it keeps us out of trouble by keeping us immobile
Accross species, what is related to sleep duration?
How do genetics affect how long we sleep for?
We have a chronotype caused by the length of the per3 gene
What gene is associated with duration of sleep?
Who stayed awake for 264 hours?
How long did Randy Gardner stay awake for?
What happened when Randy Gardner had been awake for 2 days?
Irritable, nauseated, memory issues
What happened when Randy Gardner had been awake for 4 days?
Fatigued and had delusions
What happened when Randy Gardner had been awake for 7 days?
Language issues and tremors
How long did Randy Gardner take to recover after the experiment?
2 nights, slept for 14 hours on the first, 10 on the second and then was back to normal
What areas are affected by sleep deprivation?
Motor function, cognitive performance, working memory, mood, executive atention
What are the main ways sleep are measured?
Patient reported outcomes (Sleep diaries)
Actigraphy (Motor activity)
PSG (Multiple signals)
What does PSG stand for?