A wide range of environmental factors affect intelligence and mental retardation. Biological risk factors for mental retardation include malnutrition; exposure to toxins such as lead, alcohol, and PCBs, and being born at LBW.
What are 3 factors that may cause mental retardation?
Causes of mental retardation include fetal alcohol syndrome and fetal alcohol effect; brain damage caused by the use of prescription or illegal drugs during pregnancy; brain injury and disease; and genetic disorders, such as Down syndrome and fragile X syndrome.
What are the factors influencing mental retardation?
A number of factors including environmental factors, genetic factors, malnutrition, maternal use of alcohol during pregnancy, drug and poverty are responsible for MR. The congenital dysfunction of brain and injury of brain can also cause MR.
What does the environmental hypothesis suggest about mental retardation?
The environmental notion of mild mental retardation is closely linked to the idea that these children are raised in generally understimulating, austere environments.
What are the five causes of mental retardation?
What causes intellectual disability?
- Genetic conditions. These include things like Down syndrome and fragile X syndrome.
- Problems during pregnancy. …
- Problems during childbirth. …
- Illness or injury. …
- None of the above.
What four risk factors are associated with causes of intellectual disabilities?
Causes of intellectual disability can include:
- Infections (present at birth or occurring after birth)
- Chromosomal abnormalities (such as Down syndrome)
- Metabolic (such as hyperbilirubinemia, or very high bilirubin levels in babies)
- Nutritional (such as malnutrition)
What is the most common cause of preventable mental retardation?
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 the major cause of mental retardation in phenylketonuria?
1) deficiency. PAH is a liver-specific enzyme that catalyses the hydroxylation of l-phenylalanine (Phe) to l-tyrosine in the presence of the cofactor, tetrahydrobiopterin. Accumulation of phenylalanine generates a brain damage and consequently irreversible mental retardation.
What is #1 preventable cause of mental retardation?
Problems during pregnancy – Use of alcohol or drugs by the pregnant mother can cause intellectual dis- ability. In fact, alcohol is known to be the leading preventable cause of intellectual disability.
What are some environmental causes of intellectual disabilities?
The most common known preventable or environmental cause of intellectual disability is fetal alcohol syndrome, the most common chromosomal cause is Down syndrome, and the most common genetic cause is Fragile X syndrome.
What are the environmental causes of intellectual disabilities?
Environmental exposure to toxins
Pre- and post-natal exposure to toxins can cause intellectual disabilities. Of particular concern are lead, mercury, and radiation. Avoiding exposure to these toxins reduces the risk of developing an intellectual disability. Mercury is found in polluted waters.
What are exogenous causes of mental retardation?
Exogenous (or reactive) depression is triggered by an outside stressor such as the loss of a loved one, getting divorced, or losing your job. 2 People who experience or witness a traumatic event may develop depression as a direct result of that exposure.