How do major body movements affect sleep stage scoring?

Updated: Aug 19, 2019
  • Author: Andres A Gonzalez, MD, MMM, FACNS; Chief Editor: Selim R Benbadis, MD  more...
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Answer

Answer

At times, movement and muscle artifact obscures the EEG for more than half the epoch such that the stage cannot be determined. In such cases, the epoch is scored as Stage W when alpha rhythm is present for any part of the epoch. Epochs with a major body movement, but no discernable alpha rhythm, that precede or follow an epoch of stage W are scored as stage W. If neither criteria can be met the epoch is scored as the same stage as the epoch that follows it.


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