Search results
Results from the WOW.Com Content Network
Down syndrome or Down's syndrome, [12] also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability , and characteristic physical features.
Down syndrome and fragile X syndrome are examples of syndromic intellectual disabilities. Intellectual disability affects about 2–3% of the general population. [11] Seventy-five to ninety percent of the affected people have mild intellectual disability. [11] Non-syndromic, or idiopathic cases account for 30–50% of these cases. [11]
Used of people with Down Syndrome. A Dutch profanity sometimes appearing in English as "downy" and generally considered derogatory [32] Dumb: Especially when preceded by "the" [17] [22] Dummy and dumb Used of people with mental disabilities, or more generally people perceived as stupid or ignorant.
The obsolete medical terms Mongolian idiocy and Mongolism referred to a specific type of mental deficiency, associated with the genetic disorder now known as Down syndrome. The obsolete term for a person with this syndrome was called a Mongolian idiot .
Down syndrome is a genetic condition in which people are born with an extra copy of chromosome 21. This extra copy affects the development of the body and brain, causing a range of physical and mental impairments for the individual. Fragile X syndrome, most frequent among males, is thought to cause autism and intellectual disability.
There are a variety of disabilities affecting cognitive ability.This is a broad concept encompassing various intellectual or cognitive deficits, including intellectual disability (formerly called mental retardation), deficits too mild to properly qualify as intellectual disability, various specific conditions (such as specific learning disability), and problems acquired later in life through ...
Down syndrome is the most common genetic condition in the U.S. Approximately 400,000 Americans have Down syndrome. Here are amazing individuals with Down syndrome who are breaking the barriers of ...
A child with Down syndrome. A prominent example of a genetically determined neurodevelopmental disorder is trisomy 21, also known as Down syndrome. This disorder usually results from an extra chromosome 21, [41] although in uncommon instances it is related to other chromosomal abnormalities such as translocation of the genetic material.