Quick Answer: What Is The Most Common Cause Of Mental Retardation?

What is the main cause of mental retardation?

Illness or injury.

Infections like meningitis, whooping cough, or the measles can lead to intellectual disability.

Severe head injury, near-drowning, extreme malnutrition, infections in the brain, exposure to toxic substances such as lead, and severe neglect or abuse can also cause it..

What tests determine mental retardation?

The Wechsler and Binet scales remain the two dominant, language-loaded, individually administered intelligence tests used for the diagnosis of mental retardation in the United States.

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).

How many levels of mental retardation are there?

The condition is further divided into four levels of retardation based on IQ, which include mild mental retardation (IQ between 50-55 and 70), moderate mental retardation (IQ between 35-40 and 50-55), severe mental retardation (IQ between 20-25 and 35-40), and profound mental retardation (IQ below 20 or 25) (American …

Is mental retardation hereditary?

Mental retardation is caused by a number of different factors. 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. FXS is estimated to affect 1 in 2,500 males and 1 in 8,000 females.

What is the difference between intellectual disability and learning disability?

An intellectual disability describes below-average IQ and a lack of skills needed for daily living. This condition used to be called “mental retardation.” A learning disability refers to weaknesses in certain academic skills. Reading, writing and math are the main ones.

What is the leading cause of mental retardation in newborns?

Fetal alcohol syndrome is now leading cause of mental retardation.

What are the types of mental retardation?

Mental retardation comprises five general categories: borderline, mild, moderate, severe and profound. Categories are based on scores obtained through use of age-standardized tests of cognitive ability (Table 1).

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 retardation a disability?

Intellectual Disability (ID) (formerly called mental retardation) is the most common developmental disability–nearly 6.5 million people in the United States have some level of ID.

Is Autism considered an intellectual disability?

About 1% of the general population is thought to have intellectual disability, and about 10% of individuals with intellectual disability have Autism Spectrum Disorder (ASD) or autistic traits. However, a much higher percentage of individuals with ASD have intellectual disability3.

What causes an intellectual disability?

Some of the most common known causes of intellectual disability include fetal alcohol syndrome; genetic and chromosomal conditions, such as Down syndrome and fragile X syndrome; and certain infections during pregnancy. Children who have a sibling with autism are at a higher risk of also having autism spectrum disorder.

Does mental retardation get worse with age?

What mental changes occur, as adults with mental- retardation grow older? Like the general population after age 50, people with mental retardation, who do not have Down syndrome, experience a gradual decline in overall intellectual capacity, a decrease in their speed of recall, and slower general cognitive functioning.

Can MRI detect mental retardation?

MRI allows detection of multiple minor morphological anomalies. Most have classically been considered as normal variants but they may in fact be markers of cerebral dysgenesis and are currently the only anomaly detected in the work-up of patients with mental retardation.

What are signs of low IQ?

Lower than average scores on IQ tests. Difficulties talking or talking late. Having problems remembering things….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.

What are the 4 levels of an intellectual disability?

There are four levels of ID:mild.moderate.severe.profound.

What is severe mental retardation?

Definition. Severe Mental Retardation is defined by the presence of significantly subaverage general intellectual functioning as well as significant limitations in adaptive functioning (adaptive behavior) present prior to the age of 18 years.

What is mild mental retardation?

Definition. Mild mental retardation is defined as significantly subaverage intellectual ability, which ranges between 50–55 and 70, and concurrent delays in adaptive functioning that present prior to the age of 18.

What is mental retardation now called?

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 …

Is ADHD mental retardation?

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%.