AP PSYCH Sleep & Scans

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sleep stages and types of brain scans

Last updated 10:57 PM on 10/6/26
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9 Terms

1
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NREM Stage 1

  • first stage

  • drifting in and out of sleep

  • brain waves slow down and muscles relax


2
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NREM Stage 2

  • second stage

  • light sleep ~20 min

  • includes sleep spindles and k-complexes


3
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NREM Stage 3

  • third stage

  • deep sleep (restoration of resources)


4
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REM sleep

  • dreams, muscle paralysis

  • increased brain activity


5
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CT/CAT

x-ray of brains anatomy

6
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MRI

magnetic fields to show the structure of the brain

7
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fMRI

magnetic fields to show the how the brain works during function

8
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PET

tracking how much radioactive glucose is consumed

9
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EEG

electrical impulses in brain