BIOC32H3 Lecture Notes - Lecture 11: Nocturnal Enuresis, Theta Wave, Sleep Disorder
Document Summary
Eeg measures graded potential which are more common in the nervous system. Awake and active (attentive) are seen as beta waves, high frequency but low. Awake and resting (not attentive) and closes eyes are seen as alpha waves, higher amplitude and lower frequency. Opening of the eyes does not depend on light, or seeing anything. Same task done in dark the transition of beta to alpha waves or vice versa is the same. Body (skeletal muscles) is paralyzed so we don"t act out our dreams. Non rem sleep divided in four stages. 1)alpha and theta waves (higher amplitude and lower frequency) in the background that act as a hallmark that this person is in sleep. 2) predominantly theta waves where there are sleep spindles (burst of electrical activity) and k-complex. These two occur when there is some type of stimulus such as a sound. Might represent activity of thalamus suppressing sensory information getting to cortex to wake you up.
