Delayed achievement of a number of key developmental milestones eg. Conditions such as Down’s Syndrome, Rett’s Syndrome and Fragile X Syndrome.
Common signs may include:
- delayed acquisition of milestones: the child is late in sitting up, crawling, walking
- limited reasoning or conceptual abilities
- fine/gross motor difficulties
- poor social skills/judgment
- aggressive behaviour as a coping skill
- communication problems
The following lists complicating factors that may cause symptoms of developmental delays.
• Exposure to toxins
• Uncontrolled seizures
• Asphyxia or hypoxic ischemic
• Structural brain abnormality
• Genetic, syndromic or
• Inborn error of metabolism
• Severe environmental deprivation
• Malnutrition or failure to thrive
The Sound Learning Center. 2009. Glossary. Retrieved August 15, 2009 from http://www.thesoundlearningcentre.co.uk/glossary/
2006. Teaching Case Report. A child with an underecognized form of global developmental disorder: a congenital disorder of glycosylation. Practice. 175 (11) 1369-1370.