Table of Contents
Can mental retardation be 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 most common genetic cause of mental retardation?
Specific examples of metabolic disorders with prominent MRDD include phenylketonuria, maternal phenylketonuria, Lesch-Nyhan, galactosemia, and adrenoleukodystrophy. o Down Syndrome is the leading genetic cause of mental retardation, occurring in about 1/800-1000 births.
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, especially in the absence of a defined cause.
What are four causes of 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.
Is autism hereditary?
ASD has a tendency to run in families, but the inheritance pattern is usually unknown. People with gene changes associated with ASD generally inherit an increased risk of developing the condition, rather than the condition itself.
How do you know your child has mental retardation?
Sit up, crawl, or walk later than other children. Learn to talk later or have trouble speaking. Have trouble understanding social rules. Have trouble seeing the consequences of their actions.
Can you be born with mental illness?
Genetics (heredity): Mental illnesses sometimes run in families, suggesting that people who have a family member with a mental illness may be somewhat more likely to develop one themselves. Susceptibility is passed on in families through genes.
Do genetics play a role mentally ill?
Mental disorders are the result of both genetic and environmental factors. There is no single genetic switch that when flipped causes a mental disorder. Consequently, it is difficult for doctors to determine a person’s risk of inheriting a mental disorder or passing on the disorder to their children.
What are the four levels of mental retardation?
The four levels of intellectual disability, sometimes referred to as mental retardation, are mild, moderate, severe and profound. Persons suffering from any level of intellectual disability have an intelligence quotient below 70.
What are the characteristics of mental retardation?
The main characteristics of mental retardation include a lower-than-average intelligent quotient (IQ), difficulty with practical daily life skills, learning difficulties or disabilities, developmental delays, memory problems and lower attention spans.
What is the main cause of mental retardation?
Down syndrome, one of the most common causes of mental retardation, is caused by an extra chromosome in the cells. Another fairly common chromosomal defect called fragile X syndrome causes mental retardation mainly in boys.
What are the symptoms of mental retardation?
Delay in the formation of motor skills.