sleep sheet

sleep sheet - SLEEP: Brain Rhythms: Slow, alpha, fast (beta...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
SLEEP: Brain Rhythms: Slow, alpha, fast (beta and gamma), what do they mean? EEG EEG - electrical activity in brain Stage 1 - transition to sleep - theta activity (3.5-7.5Hz intermittently) Stage 2 - synchronized - theta activity with sleep spindles and k complexes Stage 3 - synchronized w/some delta activity (<4Hz) Stage 4 - synchronized w/high delta activity REM - desynchronized - fast rhythms -Alpha - 8-13Hz: associated w/relaxation - resets brain every 100msec - begins transition to sleep -Slow - <8Hz: blocks processing of sensory input - synchronized -in stages 1-4 -Fast (beta, gamma) - 13-60Hz - low amp, high freq - create reverberating circuits synchronizes rhythms - seen in REM and awake Neurotransmitters and arousal: Achetylcholine, Noradrenaline, Serotonin, Histamine, and Adenosine: -Ach is active during waking and REM. REM sleep is triggered by a release of Ach from the Pons which excites the Pontine Reticular Formation and results in the brain being bathed in Ach -NA from the locus coeruleus and
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

sleep sheet - SLEEP: Brain Rhythms: Slow, alpha, fast (beta...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online