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sleep
Sleep stages and abnormal events
19
Health Care
Not Applicable
07/21/2011

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Cards

Term
Amplitude
Definition
microvolts(uV) -How tall the wave is on a PSG.
Term
Distribution
Definition
part of the scalp (frontal, Central, Occipital
Term
Frequency
Definition
the number of waves per second. If there are 5 waves persecond the frequency is 5 Hz.
Term
LAMF
Definition
Low amplitude mixed frequency - Background EEG -4-7Hz.
Term
W(Wake)
Definition
Occipital-Alpha rhythm whene eyes are closed. Chim- Emg amplitude is high.
Distribution- Occipital
frequency- 8-13 HZ
Term
Stage N1
Definition
EEG show LAMF pattern in the theta range of 4-7 HZ. Central-Vertex shape waves (V waves). Amplitude of v waves is ablout 75uV.
Amplitude - about 75uV
Distribution- Central
Frequency-4-7 Hz
Term
Stage N2
Definition
K comples
Distribution - frontal
Frequency 2 Hz or less
Waveform- Sharp

Sleep spindles
Distribution-Central
Frequency- 11-16HZ
Waveform- Sinsoidal
Term
Stage N3
Definition
Slow wave(Delta)
Amplitude->75uV
Distribution - Frontal
Frequency- 0.5-2 Hz
Waveform- varies
Term
Stage R(REM)
Definition
EEG -LAMF sawtooth waves
Distribution- central
Frequency- 2-6 HZ
Waveform- Triangular, serrated
Term
EEG Arousal
Definition
is defined as a 3 second shift in eeg frequency during sleep.
Term
microarousal
Definition
a shift in EEG frequency for less
Term
Beta Spindles
Definition
drug spindles
benzodiazepines
barbiturates
chronic pain
Parkinson's Disease
Fibromyalgia
Term
Periodic Limb Movement
Definition
at least 8uV
4 limb movement-5 seconds and no greater than 90 seconds and no greater than 90 seconds apart
Term
Obstructive Apneas
Definition
as a complete cessation of airflow for at least ten seconds, which includes continued respiratory effort in the chest and/or abdomen. Oxygen desaturations and/or EEG arousals frequently occurs.
Term
Hypopneas
Definition
a decrease in airflow volume. the airflow must decrease by least 30% of the orginal amplitude, and be associated with an oxygen desaturation of at least 4%.
Term
Central Apnea
Definition
a apnea without respiratory effort.It is characterized by a complete cessation of airflow for at least ten seconds with no rspiratory effort throughout the entire event.
Term
Mixed Apnea
Definition
characterized by a complete cessation of airflow for at least ten seconds, which starts central and ends obstructive.
Term
Cheyne Stokes Breathing
Definition
characterized a repetitive waning and waxing pattern in airflow volume.
Term
(RERA's)Respiratory Effort Related Arousals
Definition
arousals that are associated with a decrease in airflow that does not meet the criteria for an apnea or hypopheas. the decrease in airflow must be at least 10 seconds in duration.
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