Why it is harder to recover from jet lag when flying east
If you've ever found that recovery from jet lag took even longer than you expected it to, physicists have answers: A new mathematical model helps explain why flying east is tougher on jet-lag recovery.

The model takes into account how certain cells in the human brain respond to crossing time zones, according to the study, published today (July 12) in the journal Chaos.

These cells, called "neuronal oscillator cells," regulate people's circadian rhythm, or biological clock, by syncing up with one another and also linking up with external cues, said Michelle Girvan, an associate professor of physics at the University of Maryland and a co-author of the study.

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