HLTH 200 Lecture Notes - Lecture 12: Rhinovirus, University Of Manchester, Nonverbal Communication
7 May 2018
School
Department
Course
Professor
Health 200
T/Th 2:30pm-3:45pm
Lisa DuPree, Jamie Hamblin, Dr. Margaret Harris
Tuesday, 4/10/18
1
Sleep
Dr. Amanda Freeman
• While e’re asleep e’re ot proesses our eteral orld
• We do’t ko ho uh tie e sped i eah sleepig stage
• We take sleep for grated eause e do’t pa attetio to our sleep hile e’re
sleeping
• 21% of US adults reported insufficient amounts of sleep (<6 hours/night)
• The average number of hours of sleep in the US has decreased gradually overtime
o I 9 is as 6 hours, o it’s do to 6
• Recommended hours of sleep per night for individuals 18 years and older is 7-9 hours
• An estimated 27% of college students are at risk of at least 1 sleep disorder
o Example: insomnia
• Sleep schedules differ significantly by year in school based on a survey:
o Showed that bedtimes got later and later with each year in school
o College bedtime decreased slightly
o Wake up relatively at the same time in high school and college
o Weekends you sleep in a lot later in college, and in high school
o “oial jet lag- transition from sleep schedule on the weekends versus the
weekdays
▪ takes a toll on our bodies
• it’s iportat to get sleep aroud the sae ties eer da
• Homeostatic and Circadian rhythms control when we sleep
o Circadian rhythm: about a rhythm, based on when the light is out
o Homeostatic rhythm: sleep drive based on how much previous sleep you had
▪ Your homeostatic rhythm increases every minute of the day as you
progress forard i tie fro he ou iitiall oke up, ad ou’re
more likely to go to sleep as it increases
▪ Your hoeostati rhth dereases as ou’re asleep
o Higher sleep pressure= increased likelihood to fall asleep
▪ More likely to fall asleep in the afternoon/evening (when it gets dark)
▪ This is h ou a’t fall asleep after ou’e pulled a all-nighter at 6am
• Coffee is an approximately $30 billion dollar-a-year US industry
• Energy drinks are a approximately $12.5 billion dollar-a-year US industry
• Why caffeine?
o Adenosine plays a role in regulating the homeostatic rhythm
o Caffeine fights against adenosine, and therefore the homeostatic rhythm
response
o Melatonin is produced by the pineal gland and is released into the circulatory
system and CSF
o Melatonin production is inhibited by light and permitted by darkness
o Melatonin regulated circadian rhythem
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