In some cases, however, severe and persistent symptoms can cause chronic insomnia and considerable mental distress. It is a particularly disturbing problem in people with certain medical conditions, such as kidney problems. The insomnia, if severe, resulting from restless legs syndrome can be serious. Consequences of Insomnia Economic Effects. Reduced Mental Functioning.
Insomnia can lead to reduced concentration, decreased memory, and impaired task performance.
Some experts report that deep sleep deprivation impairs the brain's ability to process information. One study indicated that healthy sleep is important for learning certain perceptual skills related to visual patterns as well as repetitive skills, such as typing. Some studies reported no difference in test scores between people with temporary sleep loss and those with full sleep, although a Canadian study found that students who slept after cramming for an exam did better than those who stayed awake. One study reported that missing only two to three hours of sleep every night for a week significantly impaired performance and mood. Stress and Depression.