Children with neurodevelopmental disorders have a high prevalence of sleep problems, between 50-80% compared to 25-30% of neurotypical children. This poor sleep quality is also linked to a worsening of these children's clinical condition during the day.

It is around 30 months of age that it becomes evident that children with autism sleep less than neurotypical children and experience more nighttime awakenings . In this regard, it is important to pay attention because the shorter their sleep, the greater their communication difficulties will be. The reasons for this are multifactorial : biological, medical (for example, the presence of epileptic seizures, gastroesophageal reflux, apnea, restless leg movements, etc.), and behavioral. The most frequent disorder is insomnia, but sleep apnea-hypopnea syndrome (SAHS), restless legs syndrome (RLS), periodic limb movements during sleep (PLMS), or rhythmic movement disorders (RMD) may also occur.