According to Inc, recent research indicates many who chronically deprive themselves of sleep don’t realize how they’re affected.

A new study in Brain and Behavior systematically analyzed brain patterns of 839 subjects.

Researchers from the University of Utah asked individuals how much sleep they reported over the previous month, and to report any daytime dysfunction they experienced. (Daytime dysfunction was defined as having trouble staying awake while driving, eating meals, or engaging in social activities and who also deny problems keeping up enthusiasm to get things done during the day.)

Subjects were then separated into groups based on their answers. Conventional sleepers were defined as those getting between seven and nine hours of sleep per night, with “short sleepers” reporting less than six hours per night.

The patients were then placed in a “functional MRI,” where they were closely observed.

What were the results?

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