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Consciousness and Sleep
Consciousness and Sleep

... This stage is known as REM sleep; the other four sleep stages are known as non-REM (or NREM) sleep. These various stages of sleep alternate throughout the night. Sleep begins with the NREM stages and has several sleep cycles, each containing some REM and some NREM sleep. The person goes from wakeful ...
Bio Chap 15 - mlfarrispsych
Bio Chap 15 - mlfarrispsych

... through the stages in reverse order. • But rather than returning to Stage 1, the sleeper enters REM sleep. – REM, or rapid eye movement sleep is so called because the eyes dart back and forth horizontally during this stage. – REM sleep increases over the night and deep slow wave sleep decreases. – M ...
Sleep Brain Labelling
Sleep Brain Labelling

... 1) THALAMUS - The thalamus is the gatekeeper and stops signals from the body/brain from going to the cerebral cortex ...
Reticular formation,sleep and wakefulness
Reticular formation,sleep and wakefulness

... less bodily muscle activity & also that during this phase the consolidation of dreams in memory doesn’t occur. ...
What is consciousness?
What is consciousness?

... • Circadian Rhythm- biological clocks (circa dies- about a day), regular bodily rhythms (temperature and wakefulness) that occur on a 24 hour cycle. Most studied circadian rhythm is that of the sleep/wake cycle It is true that if it were not for cues such as the sunrise and sunset, people would act ...
James Robertson
James Robertson

...  Turns off Orx during sleep  Disruption of GABAB receptor results in fragmented sleep-wake cycles ...
What is a sleep disorder?
What is a sleep disorder?

... regular sleep routines, exercise, a good diet, using the bed for sleeping. ...
States of consciousness
States of consciousness

... triggered by intense emotional experience or sudden movement Another symptom is sleep paralysis – occurs just before falling asleep or waking up – person is awake but unable to move – paralysis ends when they are touched or moved During the paralysis they are in a sort of dream called ...
Chapter 7 States of Consciousness II
Chapter 7 States of Consciousness II

... Biological Rhythms and Sleep Circadian Rhythms occur on a 24-hour cycle and include sleep and wakefulness. Termed our “biological clock,” it can be altered by artificial light. ...
Sleep Mar 19 2013x - Lakehead University
Sleep Mar 19 2013x - Lakehead University

... Lesions of the brainstem of human can cause sleep and coma suggesting the brain stem must play a role in keeping us awake Moruzzi (1940s) attempted to sort out the brain stem’s control of waking and arousal • Lesions in the midline structures of the brain stem caused a state similar to non-REM sleep ...
Supplementary Figure Legends - Word file (28 KB )
Supplementary Figure Legends - Word file (28 KB )

... MBs, sleep-promoting neurons (e.g. 201Y) are normally most active at night, and wake promoting/sleep-inhibiting neurons (e.g. c309/MBSwitch) are normally most active during the day (diurnal influences are indicated by upward and downward deflections in sinusoids). Antagonistic signals from these two ...
CHAPTER OUTLINE
CHAPTER OUTLINE

... dream images that abruptly awaken a person in a state of intense fear. The condition is sometimes treatable with drugs. 8. REM behavior disorder is a loss of the paralysis that usually occurs in REM sleep. As a result, a sleeper may appear to act out dreams, sometimes even attacking a sleep partner ...
8 pages - Science for Monks
8 pages - Science for Monks

... sleep, gamma activity is very minimal. But we have observed that an expert meditator, a very senior experienced meditator, will have an increase in gamma activity during REM sleep. This is an important aspect because meditators report that they are either a lucid dreamer—a person who knows they are ...
Limbic System
Limbic System

... under the skin of the chest and can keep electrical activity of the brain from becoming chaotic ...
Practical Implications of Sleep Neurochemistry
Practical Implications of Sleep Neurochemistry

... http://journals.prous.com/journals/dnp/20031608/html/dn160504/images/DeLeccea_f1.jpg ...
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... We spend almost one third of our life time just to sleep. Sleep/wakefulness cycle is a very intriguing physiological phenomenon. We fall asleep at least once per day. After sleeping for a while, we can wake up naturally. However, the mechanism regulating sleep/wakefulness cycle has not been complete ...
OL Chapter 2 overview
OL Chapter 2 overview

... . . . Aserinsky watched the machine go wild, tracing deep zigzags on the graph paper. The discovery of REM (rapid eye movement) occurred accidentally. To see if an EEG (electroencephalograph) was working properly, Aserinsky placed the electrodes near his 8-year-old son’s eyes. Periodically during th ...
Sleep and Arousal
Sleep and Arousal

... EEG Changes in Sleep • Waking: Alpha (10 Hz) and beta/gamma waves (40 Hz). • Slow-Wave sleep: From alpha to spindles (14 Hz) and delta (1-4 Hz). • REM sleep: Cortical arousal and muscular atonia. Also called paradoxical or dream sleep. • Triggered in pontine reticular formation. ...
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... awake, his brain activity slows down to a large amplitude and slow, regular alpha waves (9-14 cps). A meditating person exhibits an alpha brain activity. ...
SLEEP AND EEG
SLEEP AND EEG

... Note – Time for REM sleep increases during each cycle. ...
SLEEP AND EEG
SLEEP AND EEG

... Note – Time for REM sleep increases during each cycle. ...
L8-Physiology of Sleep and EEG 2013
L8-Physiology of Sleep and EEG 2013

... NREM Sleep promoting systems: Preoptic area: VLPO and MNPO; are active during NREM sleep The neurons in these nuclei contain the inhibitory neurotransmitter GABA and the inhibitory neuropeptide galanin, and they innervate all the arousalpromoting regions, including the LDT/PPT, LC, DR, TMN, and also ...
Consciousness & Its Variants
Consciousness & Its Variants

... waves w/ some delta waves (slower, larger waves) – Characterized by short bursts of brain activity called sleep spindles • Last about a second or two ...
Sleep and Biological Rhythms
Sleep and Biological Rhythms

... cycle lasts about 24 hours (e.g. sleep-waking cycle)  Light is an external cue that can set the circadian rhythm ...
What is Consciousness?
What is Consciousness?

... •Using an EEG, sleep researchers have shown the mind is “awake” during various stages of sleep. Sleep Stages: Stage 1 •As we lay with our eyes closed we are in an awake but highly relaxed state characterized by alpha waves (_______________________) being emitted from our brain. •As we fall asleep, w ...
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Rapid eye movement sleep

Rapid eye movement sleep (REM sleep, REMS) is a unique phase of mammalian sleep characterized by random movement of the eyes, low muscle tone throughout the body, and the propensity of the sleeper to dream vividly. This phase is also known as paradoxical sleep (PS) and sometimes desynchronized sleep because of physiological similarities to waking states, including rapid, low-voltage desynchronized brain waves. Electrical and chemical activity regulating this phase seems to originate in the brain stem and is characterized most notably by an abundance of the neurotransmitter acetylcholine, combined with a nearly complete absence of monoamine neurotransmitters histamine, serotonin, and norepinepherine. The cortical and thalamic neurons of the waking or paradoxically sleeping brain are more depolarized—i.e., can ""fire"" more readily—than in the deeply sleeping brain. The right and left hemispheres of the brain are more coherent in REM sleep, especially during lucid dreams.REM sleep is punctuated and immediately preceded by PGO (ponto-geniculo-occipital waves) waves, bursts of electrical activity originating in the brain stem. These waves occur in clusters about every 6 seconds for 1–2 minutes during the transition from deep to paradoxical sleep. They exhibit their highest amplitude upon moving into the visual cortex and are a cause of the ""rapid eye movements"" in paradoxical sleep.Brain energy use in REM sleep, as measured by oxygen and glucose metabolism, equals or exceeds energy use in waking. The rate in non-REM sleep is 11–40% lower.
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