Large changes in biological rhythms associated with shift work or long-distance flights can affect a person’s performance and mood. Biological rhythms, as is known, largely depend on light vibrations..

Abrupt changes in the light cycle - the change of night and day - directly provoke depression, and also reduce mental abilities, even if this in no way affects the wake-sleep cycle and biological rhythms, a team of American scientists report in their work..

Strong modifications of biological rhythms, which in particular are associated with shift work or long-distance travel, can affect a person's working ability and his mood..

Tara Legates and her colleagues at Johns Hopkins University set out to analyze whether changes in the light cycle could directly affect learning ability and mood, provided that the rhythm of wakefulness and sleep was normal..

The researchers conducted an experiment on mice, which were first accustomed to a daily cycle of changing lighting - 12 hours of " After one group of experimental mice, they were transferred to a seven-hour cycle, when darkness was replaced by light every three and a half hours.. In the control group - the second group - the cycle remained unchanged.

The transition to a seven-hour cycle did not change the total sleep time in rodents, nor did it lead to disruptions in the daily (circadian) rhythm of the body..

The paper states, "

The researchers note that antidepressant drugs (desipramine or fluoxetine) restored learning ability in mice..

According to scientists, this indicates that it is the depressive state that becomes the primary phenomenon..

Previous studies showed that failures in the light regime disrupted the circadian rhythm, which in turn led to lack of sleep, sleep failure, and then to a violation of working ability.. The team of Tara Legates proved for the first time that the failure of the lighting regime itself can negatively affect performance, without the support of the "

global science. en.