Factors Affecting Sleep Flashcards
what effects do stimulant drugs have? (2)
- keeping you awake or making you more alert
- reducing the quality of sleep
how soon can caffeine have a stimulant effect?
15 minutes after consuming
half life of caffeine
5 hours
what does caffeine increase the production of?
adrenaline
adrenaline
the hormone which prepares you for fight or flight
what does caffeine block
sleep hormones eg. melatonin
effect of amphetamines
increase wakefulness
what do large doses of amphetamines cause?
psychosis and a reduction in cognitive function
what does alcohol initially act as, and what does it do?
a depressant, which helps us fall asleep quickly
what does alcohol later act as, and what does it do?
a stimulant, which will reduce the quality of sleep, wake you up and change the proportions of REM
what does evening light exposure do?
inhibits the rise of melatonin, delaying the body’s transition into sleep and sleep itself
light from devices is on what wavelength?
blue wavelength
effect of blue wavelength light
supresses or delays sleep and the production of melatonin
who did Chang et al. study?
people who used devices before bed
what did Chang et al. find? (4)
- less melatonin is released
- took longer to sleep
- had less REM sleep
- were less alert
