Child is developing slower than his or her peers

Sleep disorders are conditions that affect the quality, timing or duration of your sleep, impacting your ability to function when you are awake. There are many types of sleep disorders, they include disturbances in the quality or quantity of sleep or excessive daytime sleepiness, abnormal behaviors that occur during sleep, sleep disorder related to a mental disorder and many more.

A condition where the patient experiences a strong, almost irresistible urge to perform an action (e.g. shaking the head, squeezing the eyes, or making a certain noise). Most tics will improve with transition to adulthood, however the condition may persist for some. Known triggers include sleep deprivation, excitement and stressful events.

Ataxia-telangiectasia is a rare, inherited disorder that affects the nervous system, immune system, and other body systems beginning during childhood, usually before age 5. There is progressive difficulty with coordinating movements (ataxia) , increased risk of cancer and infections. It is caused by mutations of the ATM gene which controls production of an enzyme that regulates cell division following DNA damage.

West syndrome (infantile spasm)

A type of epilepsy (recurrent seizures) that occurs in young children. It is the result of damage to the developing brain, with various causes like chromosomal abnormalities (e.g. Down's syndrome), brain malformations, or infections of the brain.