(28) Sleep Phys and Sleep Disorders

Question 1

narcoleptics fall sleep directly into what stage of sleep

Answer 1

REM

Question 2

without light input, what is the length of our biological clock cycle (for a day)

Answer 2

26 hrs

Question 3

describe the pathway that activates sleep when there is a decreased ambient light

Answer 3

dec ambient light activates retinal ganglion cells which send AP to superchiasmic nucleus which will activate PVN. PVN activates neurons in intermediolateral gray matter to upper spinal cord which will modulates superior chain ganglia. Sympathetic fibers travel to pineal gland activate it to make melatonin. Melatonin secreted and stimulates sleep

Question 4

At what tome does melatonin production rise? reach its peak?

Answer 4

begins in early evening as daylight wanes and peaks around 2 to 4am

Question 5

what other things have circadian rhythms in the body

Answer 5

GH, cortisol, and tempurature

Question 6

What is used to measure sleepiness

Answer 6

polysomnography