Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Ataxia-Telangiectasia(also: A-T, Louis-Bar Syndrome)
- A rare, inherited, progressive neurological disorder that typically appears in early childhood and causes increasing difficulties with movement, coordination, and immune function. Children with A-T usually begin walking at a typical age but experience progressive ataxia (loss of…
- Partial Trisomy 9p(also: 9p Duplication Syndrome, Rethore Syndrome)
- A rare chromosomal condition in which a portion of the short arm of chromosome 9 is present in triplicate rather than in duplicate. The condition is associated with intellectual disability, distinctive craniofacial features, developmental delay, and in many cases co-occurring…
- Rett Syndrome(also: RTT)
- A rare, X-linked neurodevelopmental disorder caused in most cases by mutations in the MECP2 gene, affecting almost exclusively females. After typical early development, children with Rett syndrome lose purposeful hand use and acquired speech between 6-18 months, develop…
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