Scoring Transitions Flashcards

1
Q

After an arousal from N2 sleep, what is the next epoch?

A

The next epoch is based upon itself:

  • Greater than 50% Alpha = awake
  • Less than 50% Alpha and vertex waves = N1
  • K complexes or sleep spindles in the first half of the epoch = N2
  • K complexes or sleep spindles in the 2nd half of the epoch = N1 (next epoch = N2)
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2
Q

After an arousal from REM sleep, what is the next epoch?

A
  • LAMF & SEMs = N1

- LAMF & NO SEMs = continue REM

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3
Q

Define major body movement

A

Where movement obscures greater than one half of the epoch

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4
Q

What do I score the epoch as that has major body movement?

A
  • Any alpha = wake
  • No alpha but the prior and next epoch is wake = wake
  • Otherwise score it the same as the next epoch
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5
Q

What do I score the epoch as if the major body movement occurs during N2 sleep?

A
  • LAMF & SEM = N1

- LAMF & NO SEM = N2

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6
Q

Where does REM sleep start?

A

-Find the start of REM sleep and then go back to the last epoch of N2 sleep and start there

or

-Score REM from the point where the chin EMG drops to REM level

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7
Q

What are the rules for continuing REM (without rapid eye movements)?

A

Continue scoring REM sleep as long as there is LAMF and the chin EMG is low (no K complexes or sleep spindles)

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8
Q

What are the rules for ending REM sleep?

A
  • Transition to Wake or N3
  • Increased EMG chin tone
  • Arousal (see rules)
  • MBM (See rules)
  • N2 if K complexes or sleep spindles are seen in the first half of the epoch
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9
Q

What is the rule for continuing N2 sleep?

A

If a K complex appears in any of epoch without an accompanying arousal, that epoch is N2. All subsequent epochs with LAMF are also N2 even if they don’t have spindles or K complexes unless they have an arousal or they meet criteria for N3 or REM sleep.

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