Snails and cockroaches- eyes c. Temperature 4.Important points from graph a. Sleep passive 1.Gradual isolation of brain from body 2.Greeks- fumes in stomach rise and block the opening of the brain, stopping sensations from the body. 3.Newer- Blocking of the brain caused by blood excess, swollen thyroid gland, or actual disconnections between the nerve cells. Several different rhythms contribute to changes in level of alertness.
Individual data show sudden change.
3.Sleep gates stable even after sleep deprivation. 4.Timing of sleep gates. Night person do not show prominence of mid-afternoon peak. 5.Two characteristics appear in the resist sleep test. In well rested person, difference between resist sleep and attempt sleep appears.