A recent study investigated the impact of disrupting the circadian rhythm on adult neurogenesis. Researchers at the University of Massachusetts Amherst have zeroed in on the primary cause of negative health consequences stemming from disruptions to the body's circadian rhythms, commonly experienced
Jet lag is a temporary sleep disorder that occurs after long-distance travel across multiple time zones. The condition is caused by a mismatch between the traveler’s internal body clock and the new external time environment, resulting in symptoms such as fatigue, insomnia, and decreased alertness.Researchers at the
Cell birth and survival in the adult hippocampus are regulated by a circadian clock, so its disruption may throw off the process of neurogenesis. In the U.S. alone, some 30 million people experience phase shifts in their circadian rhythms as they work rotating schedules. Bittman explains further, “It’s possible it’s just changing the light cycle that affects neurogenesis, that jerking your clock around is bad for you, as opposed to the jet lag, which is the time delay that it takes for all circadian-dependent systems in your body to adjust to this change in daylight.”
They simulated jet lag in the form of eight-hour advances and delays at eight 16-day intervals. A cell birth marker was given in the middle of the experiment. Results showed that jet lag has little effect on cell birth but steers the fate of newborn cells away from becoming neurons. Dupers are immune to this effect of phase shifts.
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