T he 9-to-5 workday originated with American lookinv unions in the s, and today, the eight-hour workday is the norm. But however normalized the schedule, it is directly opposed to something more powerful: In a new studyscientists report that people whose internal body clocks tell Nignt Night owl looking to chill go to bed late, but are then forced to wake up early, have a lower resting brain connectivity in the regions of the brain linked to consciousness.
During the experiment, the scientists evaluated the brain function of 38 people while they slept, measuring their levels of melatonin and cortisol with MRI scans. They were also asked to loooing on their levels of sleepiness and when during the day they felt most alert.
Facer-Childs explains that this likely means their brains were more primed for doing tasks and being less sleepy. Why some people are primed to wake up early and others are driven to go to bed late stems from their genes.
The two hormones involved in the Night owl looking to chill and wake lokking have a role as well: Melatonin and cortisol levels differ significantly between the two groups of people over the course of a hour period. Facer-Childs believes this study and others suggest that the rigid 9-to-5 schedule might need to change.
However, there is limited research on the impact of circadian phenotype and time of day on FC. The aim of this study Night owl looking to chill to investigate resting state FC of the default mode network DMN in Early and Late circadian phenotypes over a socially constrained day. Following a two week baseline of 35 actigraphy coupled with saliva samples for melatonin and cortisol rhythms, participants underwent Noght at Testing consisted of resting-state functional MRI, a structural T1 scan, attentional cognitive performance tasks, and self-reported daytime sleepiness.
Seed-based FC analysis from the medial prefrontal and posterior cingulate cortices of the DMN was performed, compared between groups and linked with behavioral data. Now watch this: Science Sleep Share Subscribe. By Sarah Sloat on February 14, Sign up for our newsletter.
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