Lunch break may be a physiological needs. A new study shows that the control body to the rhythm of daily clock at least two main parts: one for the rhythm of the light control, another control for the senses.
University of Texas Southwestern Medical Center's Carole A. Dudley and colleagues point out, the interaction of the two determines the daily sleep and activity cycles, also let the mammals has the ability to adapt to environmental changes. The authors speculate that perhaps this is also our afternoon there was a time when feeling tired.
Brain choroidal upper nuclear SCN has been considered to be the master clock, the main clock in part subject to respond to the light the retina, a "clock" for protein adjustment. Other parts of the body has its own circadian clock, but is located in the forebrain (this is the processing of sensory information in parts) of the biological clock of the unusual, because it is not affected by the "clock" protein regulation, but rather by another protein: protein of NPAS2.
When Dudley team knocked a strain of mice of NPAS2 genes, they found that compared with the normal mice, this mouse on each Nikko line changes is not too sensitive, they adapt to the restricted feeding schedules capacity get weak. Normal mice by changing diet of time to adapt to change. A review of related to further discussion of the results.
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