Practice question

In human circadian physiology, what time period represents the Window of Circadian Low (WOCL), during which body temperature, alertness, and ATC controller performance hit their lowest biological point?

  1. Between 02:00 and 06:00 local body time
  2. Between 08:00 and 12:00 local body time
  3. Between 14:00 and 16:00 local body time
  4. Between 20:00 and 23:00 local body time

Answer: A — Between 02:00 and 06:00 local body time

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