Polysomnography Parameters
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6 Terms
1
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PSG: Sleep Latency
Measures: Time to sleep onset.
Findings: increase in insomnia/anxiety; decrease in hypersomnia
2
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PSG: REM Latency
Measures: Sleep onset leads to first REM.
Findings: Short in narcolepsy; often increase with SSRIs
3
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PSG: Sleep Efficiency
Measures: TST / Time in bed.
Findings: Decrease in insomnia, TD; normal in misperception
4
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PSG: Arousal Index
Measures: Arousals per hour.
Findings: increase in OSA/PLMS/anxiety
5
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PSG: REM/N3%
Measures: Architecture distribution.
Findings: decrease REM with SSRIs; decrease in N3 with aging/benzos
6
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PSG: Spindles (12-15 Hz)
Measures: Thalamocortical oscillations.
Findings: Reduced in thalamic lesions; variable in disorders
Note 
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