Intellectual disability (ID), also called intellectual development disorder (IDD) or general learning disability, and formerly known as mental retardation (MR) is a generalized neurodevelopmental disorder characterized by significantly impaired intellectual and adaptive functioning. It is defined by an IQ score below 70 in addition to deficits in two or more behaviors that affect every day, general living.
Pathophysiology: Sometimes disability is caused by abnormal genes inherited from parents, errors when genes combine, or other reasons eg. Down syndrome, Klinefelter's syndrome, Fragile X syndrome (common among boys), neurofibromatosis, congenital hypothyroidism. Intellectual disability can result when the fetus does not develop properly.
Diagnosis :The three criteria must be met for a diagnosis of intellectual disability: deficits in general mental abilities, significant limitations in one or more areas of adaptive behavior across multiple environments and evidence that the limitations became apparent in childhood or adolescence. In general, people with intellectual disability have an IQ below 70, but clinical discretion may be necessary for individuals who have a somewhat higher IQ but severe impairment in adaptive functioning.
In research completed in 1996, over 70% of respondents indicated that, in their community, people with mental health disorders are described in derogatory terms, such as crazy, loony, idiot, abnormal, cuckoo. According to the majority of respondents, the mentally ill are more often harmed and jeered at (90%) and are more aggressive and dangerous (69%) than other people. When asked about their personal attitude toward the mentally ill, 74% of respondents described it as kind, but perceived such kindness in only 42% of people in their milieu.