what is Rett Syndrome?

Answer 1

Rett Syndrome in a neurodevelomental disorder that occurs almost exclusively in girls. They seem to develop normally in the first year of life, then develop poor muscle tone and exhibit strange movements. Part of the clinical picture is very similar to autism, and is it classified as an autistic spectrum disorder. Neuromuscular deterioration continues with contractures, scoliosis and uncontrolled movements called dystonia. A defect in the MECp2 gene on the X chromosome is thought to be the cause of this tragic disorder.

Answer 2

A developmental brain disorder this link should have some information about it.