NEW335H1 Lecture Notes - Lecture 9: Sleep Onset Latency, Non-Rapid Eye Movement Sleep, Sleep Diary
Document Summary
Lecture 9 - meditation and sleep - june 08 2016. Sleep is important because: maintenance brain (clearance of waste, restoration injured/damaged tissue, ontogenetic development of the brain, maintenance of learning + memory processes. Brain activity during sleep has been extensively studies using the electroencephalogram (eeg) Sleep can be divided into five distinct stages, each exemplified by distinct patterns of eeg activity. Each sleep stage may serve a relatively unique function. These stages include: one stage of rapid eye movement (rem) and several stages of nrem sleep (nrem 1-4) An eeg is a device which is used to infer the electrical activity of specific brain regions. The neuronal basis of the eeg signal is covered in lecture 2. You will be required to understand how eeg signals are generated for your exam. Nrem1 (light sleep): slightly lower frequency activity (theta waves, 4-7 hz) Nrem2: lower frequency activity (theta, 4-7 hz) with sleep spindles and k-complexes.
