Sleep Deprivation or Deficiency

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Sleep Deprivation or Deficiency

Sleeping is a basic human need, like eating, drinking, and breathing. Like these other needs, sleeping is a vital part of the foundation for good health and well-being throughout your lifetime.

Sleep deprivation means you don’t get enough sleep.

Sleep deficiency is a broader concept. It occurs if you have one or more of the following:

Sleep deficiency can lead to physical and mental health problems, injuries, loss of productivity, and even a greater risk of death.


To understand sleep deficiency, it helps to understand how sleep works and why it’s important.

The two basic types of sleep are rapid eye movement (REM) and non-REM. Generally, REM and non-REM sleep occur in a regular pattern of 3–5 cycles each night. Non-REM sleep includes what is commonly known as deep sleep or slow wave sleep. Dreaming typically occurs during REM sleep.

Your ability to function and feel well while you’re awake depends on whether you’re getting enough total sleep and enough of each type of sleep. It also depends on whether you’re sleeping at a time when your body is prepared and ready to sleep.

If you aren’t getting enough sleep, are sleeping at the wrong times, or have poor quality sleep, you may not feel refreshed and alert when you wake up. You’ll likely feel very tired during the day.

Sleep deficiency can interfere with work, school, driving, and social functioning. You might have trouble learning, focusing, and reacting. Also, you might find it hard to judge other people’s emotions and reactions. Sleep deficiency also can make you feel frustrated, cranky, or worried in social situations.

Children who are sleep deficient might be overly active and have problems paying attention. They also might misbehave, and their school performance can suffer.


Sleep deficiency is a common public health problem in the United States. People in all age groups report not getting enough sleep.

Sleep deficiency is linked to many chronic health problems, including heart disease, kidney disease, high blood pressure, diabetes, stroke, obesity, and depression.

Sleep deficiency also is associated with an increased risk of injury in adults, teens, and children. For example, driver sleepiness (not related to alcohol) is responsible for serious car crash injuries and death. In the elderly, sleep deficiency might be linked to an increased risk of falls and broken bones.

In addition, sleep deficiency has played a role in human errors linked to tragic accidents such as nuclear reactor meltdowns, grounding of large ships, and aviation accidents.

A common myth is that people can learn to get by on little sleep with no negative effects. Research shows, however, that getting enough quality sleep at the right times is vital for mental health, physical health, quality of life, and safety.