Hollister, NC Profile: Facts, Map & Data. Hollister, North Carolina - Basic Facts. The Hollister Census Designated Place had a population of 663 as of July 1, 2016. Hollister ranks in the lower quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in North Carolina. See peer rankings below.
Stage N2 sleep is scored when either one or more K complexes is noted (and unassociated with an arousal) or one or more trains of sleep spindles appear. Stage N2. Note K complexes unassociated with arousal and trains of sleep spindles.
Sleep spindle. A sleep spindle is a burst of oscillatory brain activity visible on an EEG that occurs during stage 2 sleep. It consists of 12â14 Hz waves that occur for at least 0.5 seconds.[1][2] Sleep spindles are generated in the reticular nucleus of the thalamus.