"Not getting enough sleep is linked with  many chronic disease and conditions such as type 2 diabetes, heart disease, obesity, and depression. Not getting enough sleep can lead to motor vehicle crashes and mistakes at work, which cause a lot of injury and disability each year. Getting enough sleep is not a luxury -- it is something people need for good health. Sleep disorders can also increase a person's risk of health problems. However, these disorders can be diagnosed and treated, bringing relief to those who suffer from them."

"Sleep is critical for waking cognition -- that is, for the ability to think clearly, to be vigilant and alert, and sustain attention. We also know that memories are consolidated during sleep, and that sleep serves a key role in emotional regulation.

"Sleep deficits can accumulate over time, resulting in a steady deterioration..." (affecting physical, emotional, and cognitive health).  Susan L. Worley