Question: What Is The Most Common Cause Of Mental Retardation?

What is the most common genetic cause of mental retardation?

Among genetic disorders, Fragile X syndrome and Down syndrome are the commonest causes of mental retardation.

Fragile X syndrome (FXS) is an inherited form of mental retardation..

What is the #1 cause of mental retardation in the USA?

Facts about FASD: • It is the leading known cause of preventable mental retardation. It affects at least 1 in every 100 births in the US. The federal government estimates that each instance of FASD costs from $860,000 – $4.2 million over a lifetime.

What is mental retardation called now?

In the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), the APA replaced “mental retardation” with “intellectual disability (intellectual developmental disorder).” The APA included the parenthetical name “(intellectual developmental disorder)” to indicate that the diagnosed deficits …

What are signs of low IQ?

Lower than average scores on IQ tests. Difficulties talking or talking late….IQ 50-70.Slower than normal in all areas.Can conform socially.Can acquire daily task skills.Integrated in society.No unusual physical signs.Can acquire practical skills.Reading and math skills up to grades 3-6.

Which of the following is the most commonest type of mental retardation?

Fragile X syndrome is the most common inherited form of mental retardation and, after Down syndrome, the most common genetic form.

What are the causes of mental retardation?

What causes intellectual disability?trauma before birth, such as an infection or exposure to alcohol, drugs, or other toxins.trauma during birth, such as oxygen deprivation or premature delivery.inherited disorders, such as phenylketonuria (PKU) or Tay-Sachs disease.chromosome abnormalities, such as Down syndrome.More items…

What is the leading cause of mental retardation in newborns?

Fetal alcohol syndrome is now leading cause of mental retardation.

What are the 4 levels of mental retardation?

The DSM-IV classifies mental retardation into four stages based on severity: mild (IQ score of 50-55 to approximately 70), moderate (IQ score of 30-35 to 50-55), severe (IQ score of 20-25 to 35-40), and profound (IQ score of less than 20-25).

At what age is mental retardation diagnosed?

When is the diagnosis made? The onset of mental retardation is in childhood, before 18 years of age. The diagnosis is generally made after infancy, between the preschool and school-age periods. Sometimes the diagnosis may be made later, at the time when a thorough assessment is performed.

Is ADHD a form of retardation?

Abstract. Introduction: Attention deficit hyperactivity disorder (ADHD) is a common condition in children with mental retardation (MR), with a prevalence rate of between 4 and 15%.

Does intellectual disability run in families?

The most common causes of intellectual disabilities are: Genetic conditions. Sometimes an intellectual disability is caused by abnormal genes inherited from parents, errors when genes combine, or other reasons. Examples of genetic conditions are Down syndrome, Fragile X syndrome, and phenylketonuria (PKU).

How can mental retardation be prevented?

Prenatal diagnosis, newborn screening, dietary supplementation or restriction, hormone replacement, vaccination, and immunotherapy are just some of the techniques that have been applied to prevent mental retardation.

What are the characteristics of a child with mental retardation?

Developmental Characteristics Related to Level of Mental Retardation (DSM-IV Criteria)Mild retardationModerate retardationSlow in all areasNoticeable delays, especially in speechMay have no unusual physical signsMay have some unusual physical signsCan acquire practical skillsCan learn simple communication6 more rows•Feb 15, 2000

Is mental retardation preventable?

CONCLUSIONS. Approximately 20% of children with epilepsy have mental retardation. The cause is prenatal or genetic in nearly two thirds, and only 7% have an acquired, preventable cause. Important genetic influences may be present, espe- cially in the absence of a defined cause.

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