People with obstructive sleep apnea, a common sleep disorder linked to heavy  snoring may loose tissue in brain regions that stores short term memories.A good sleep does more than help sharpen the mind. It helps in physical reflexes, fine motor skills, performance and judgement too.

Sleep Apnea May Predict Dementia.

Poor quality sleep among the elderly can cause significant Memory loss and brain deterioration, according to a recent study by researchers at the University of California, Berkeley ...

Researchers found that during sleep the brain transfers memories from a part of the brain called hippocampus to the prefrontal cortex, a part of brain where long term memories are stored.

Sleep deprivation not only impairs attention and working memory but also long term memory, decision making and attention.Lack of sleep can result in permanent cognitive issues such as dementia, 10 years sooner than those who did not have sleep breathing problems.