Microsleep

Example of an EEG alpha wave

Example of an EEG theta wave

A microsleep is a sudden temporary episode of sleep or drowsiness which may last for a few seconds where an individual fails to respond to some arbitrary sensory input and becomes unconscious.^[1]^[2] Episodes of microsleep occur when an individual loses and regains awareness after a brief lapse in consciousness, often without warning, or when there are sudden shifts between states of wakefulness and sleep. In behavioural terms, microsleeps may manifest as droopy eyes, slow eyelid-closure, and head nodding.^[2] In electrical terms, microsleeps are often classified as a shift in electroencephalography (EEG) during which 4–7 Hz (theta wave) activity replaces the waking 8–13 Hz (alpha wave) background rhythm.^[3]

^ International Classification of Sleep Disorders, Diagnostic and Coding Manual (PDF). Archived from the original (PDF) on 2011-07-26. Retrieved 2011-07-26., page 343
^ ^a ^b Poudel, G. R., Innes, C. R., Bones, P. J., Watts, R., & Jones, R. D. (2012) Losing the struggle to stay awake: Divergent thalamic and cortical activity during microsleeps. Human Brain Mapping: 00:000-000
^ Paul, Amit; Linda Ng Boyle; Jon Tippin; Matthew Rizzo (2005). "Variability of driving performance during microsleeps" (PDF). Proceedings of the Third International Driving Symposium on Human Factors in Driver Assessment, Training and Vehicle Design. Archived from the original (PDF) on 2014-10-09. Retrieved 2008-02-10.

[ICSD-1] International Classification of Sleep Disorders, Diagnostic and Coding Manual (PDF). Archived from the original (PDF) on 2011-07-26. Retrieved 2011-07-26., page 343

[Brain-2] Poudel, G. R., Innes, C. R., Bones, P. J., Watts, R., & Jones, R. D. (2012) Losing the struggle to stay awake: Divergent thalamic and cortical activity during microsleeps. Human Brain Mapping: 00:000-000

[3] Paul, Amit; Linda Ng Boyle; Jon Tippin; Matthew Rizzo (2005). "Variability of driving performance during microsleeps" (PDF). Proceedings of the Third International Driving Symposium on Human Factors in Driver Assessment, Training and Vehicle Design. Archived from the original (PDF) on 2014-10-09. Retrieved 2008-02-10.

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