Under normal conditions, the rhythms governed by the SCN are synchronized. But when people travel by air across several time zones, they tend to feel "out of sync." Explain what psychologists have discovered about "being out of sync."
What will be an ideal response?
Answer: A good answer will include the following key points.
? Under normal conditions, the rhythms governed by the SCN are synchronized. That is, they occur in phase with one another.
? When your normal routine changes, such as in shift work or when flying across several time zones, circadian rhythms may be thrown out of phase with one another.
? This is referred to as internal desynchronization.
? Sleep and wake patterns adjust quickly to the new schedule, but temperature and hormone cycles can take several days to return to normal.
? During this time, energy levels, mental skills, and motor coordination are decreased.
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