PSYCH 133 Lecture Notes - Lecture 6: Non-Rapid Eye Movement Sleep, Ontogeny, Biphasic And Polyphasic Sleep
Document Summary
As circadian rhythm increases, our drive to be awake increases and vice versa. Amount of time elapsed since you woke up. The longer you"re awake, the more drive there is to sleep. Chemical that causes sleep pressure is adenosine. Brain clears out adenosine from brain in nonlinear manner. Deep slow wave sleep: adenosine is cleared up, adenosine levels drop. Takes 8 hours of sleep removes 16 hrs of adenosine for humans. Circadian rhythm doesn"t know about process s adenosine. After 8 hrs of sleeping/removing adenosine comes to a point that"s low enough, synchronized w/ timing of being awake. Those 2 lines meet, point at which you would naturally increase. Con of adenosine: y-axis; measured via spinal fluid (process s) Process c/degree of physiological arousal using eeg. Fools brain into thinking it hasn"t been awake for as long as it has been. Brain thinks we have 16 hrs of adenosine. Brain feels like 10 hrs of adenosine pressure.
