[Clinical characteristics of Rett Syndrome].

Background: Rett Syndrome is a neurodevelopmental disorder, one of the least commonly occurring autism spectrum disorders (ASD),affecting mainly females.

Aim: To describe features and molecular specificities of Rett syndrome.

Methods: To identify articles for this review, a Pubmed search was conducted using the following keywords: Rett syndrome, regression,mutation, stereotypes.

[Attentional impairment in children with attention deficit and hyperactivity disorder].

Background: Attention-deficit hyperactivity disorder (ADHD) is a heterogeneous disorder currently defined by clinical history and behavioral report of impairment. The Attention Network test (ANT) gives measures of different aspects of the complex process of attention.

Aims: We ask if children with Attention Deficit Hyperactivity Disorder (ADHD) will show a characteristic pattern of deficits on this test.