Normal sleep has 2 cycles: NREM (Non Rapid Eye Movement) and REM (Rapid eye movement). In which, the NREM cycle is divided into 4 stages.

Sleep plays a very important role in ensuring human health. Our lives will be greatly affected if we suffer from sleep disorders. Therefore, patients with these disorders need to be diagnosed early and treated promptly, polysomnography is a technique that significantly supports the diagnosis of sleep disorders.

Childhood sleep disorders are sleep health problems. Children with severe sleep disorders will have an impact on physical, mental, social and emotional functioning.