Flashcards in Sleep Deck (52)
What is sleep?
A normal recurring reversible state in which you loose the ability to respond to the external environment.
Not fully aware of self but able to respond to stimuli
Non REM sleep
More common at the beginning of the night
Some non narrative images
What proportion of sleep for the young in NREM?
What does an EEG show in NREM?
Synchronised rhythmic activity
Describe the physiological state found in NREM.
Partial muscle relaxation
Reduced cerebral blood flow
Reduced HR BP Tidal volume
What does REM stand for?
Rapid Eye Movement
Describe REM sleep.
Mostly at the end of the night.
What does an EEG show in REM?
Describe the physiological state found in REM.
Atonic muscles except diaphragm and extra ocular
Increased cerebral blood flow
Impaired thermal regulation
Increase active shown on brain fMRI
Why is deep sleep essential?
Allows the cortex to recover
If you are sleep deprived and finally manage to fall asleep for a short period what form of sleep is prioritised?
What is the function of REM sleep?
Mainly plays a roll in brain development
Substitute for stimulation from the external environment
REM sleep is indispensable.
False it is likely to be dispensable as Dolphins don't have an REM cycle and drugs such as Tricyclics suppress it.
Describe the sleep of a neonate.
16hrs a day roughly a sleep.
50% is REM in order to provide enough stimulation to the developing brain.
As you get older the proportion of REM sleep you experience .......
Describe the sleep of an elderly person.
Increased awakening during the night
Naps throughout the day
REM is reduced
Overall time asleep is reduced
What three things dictate if you can fall asleep?
What is the homeostatic factor in sleep?
Longer you are awake the more sleepy you get as you build up a sleep debt.
What is the emotional factor in sleep?
Need to be in a state of relaxation ad comfortable enough to sleep.
What is the circadian rhythm?
Your internal body clock controlled by the light .
What length cycle does your body clock run?
What is the sleep pattern on an adolescent?
What is the sleep pattern of the elderly?
What else does your circadian rhythm control?
How does light affect your circadian rhythm?
Retinal ganglion cells enervated which project to the suprichiasmatic nucleus
What cells make up the retinal ganglion cells involved in the circadian rhythm?
Non cone Non rod cells
What colour light particularly affects your circadian rhythm?
After 5 days of no sleep why is your endurance in exercise reduced?
Sleep has no recorded impact on your physiological state your endurance is reduced due to psychological fatigue.
Describe the affect of sleep on your body repairing itself.
No affect on muscle recovery
Tissue repair is increased