conciousness

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30 Terms

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what is conciousness

large and loaded but involves CNS

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split brain

corpus callosum cut in epileptics, and sides cannot communicate

<p>corpus callosum cut in epileptics, and sides cannot communicate</p>
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visual neglect

lesions in right parietal lobe, not aware of left stimuli, patients dont sense anything wrong, dorsal path interupted

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ADHD

very common, suggest genetics but no gene found, causes unknown, treated with adderall

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sleep

periodic, natural loss of conciousness, when brain is very active

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sleep measurments

EEG, EOG (eye movements), EMG (muscle tension)

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stages of sleep

1, 2, slow wave, and REM

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beta waves

awake and alert, 13-30 hZ, low amp, erratic

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alpha waves

awake and relaxed, 8-12 hZ, more amp, when ur getting sleepy

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stage 1

light sleep, theta waves , 2-7 hZ

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stage 2

lightish sleep, sleep spindles and k complexes, 3/min and 1/min relatively

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slow wave sleep

deep sleep, 4hZ, high amp, about 20 mins to reach

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REM

90 mins after SWS, vivid dreams, easy to wake up, desynchronized

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sleep atonia

we appear paralyzed minus the occasional twitch

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roffwarg et al

1962, eyes move like we are watching the dream, brain uses active parts as if we were doing activity in dream

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hypnogram

sleep stage graph, shows 90 min cycles

<p>sleep stage graph, shows 90 min cycles</p>
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why do we sleep?

recovery for the body and brain

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SWS functions

restores the brain via reduced bloodflow

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REM functions

protects consolidation of memory

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activation synthesis hypothesis

dreams have no meaning, consequence of whatever else is going on in the cortex

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evolutionary hypothesis

dreams being a survival, enhances daytime performances

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dyssomnias

recurring problems falling and staying in sleep

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narcolepsy

uncontrollable sleep attacks, genetic

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sleep apnea

stopping in breathing when sleeping

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night terrors

high arousal and scary sleep dreams

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insomnia

the inability to fall asleep or remain asleep, treated by new behaviours

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conditioned insomnia

lack of sleep via anxiety

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ideopathic insomnia

begins in childhood with no known cause

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hypersomnia

excessive daytime sleepiness, often caused by sleep apnea