Associated factors Males are more affected by<unk>  than females. In clinical samples, the sex ratio of affected males: females is around 3 or 4:1. The reason for this association is not known: no linkage has been found to genes on the sex chromosomes. Poor motor skills are commonly found in children with<unk> . Brain scans do not usually reveal any obvious abnormalities in children with<unk> , although quantitative comparisons have found differences in brain size or relative proportions of white or grey matter in<unk>  regions. In some cases, unusual brain gyri are found. To date, no consistent "neural signature" for<unk>  has been found. Differences in the brains of children with<unk>  vs typically developing children are subtle and may overlap with atypical patterns seen in other neurodevelopmental disorders.
Specific language impairment
Nonverbal learning disorder
Language delay
Mixed receptive-expressive language disorder
Global perceptions of autism
Speech and language impairment
Language disorder
Global developmental delay