As the phrase implies, Retarded people have reactions and instincts slowed down, that is retarded. There are some forms of mental symptoms that can be considered acquired mental retardation- and can occur as a by product of various sources- including violence and violent sports such as boxing- the punch drunk man has some of the same symptoms of the retarded person- tardive dysklesia (I donddd Tawk too good anymore, note accents- not I Don't Talk, but I donddd Tawk! it's not funny.) Senile dementiA can be considered a form of retardation and goes for juvenile forms- senior citizens suddenly demand juvenile items (Where are my electric trains? Where are my comic books?) In some cases staff in senior citizen homes play along with their senility by even supplying such things as dolls and stuffed animals like the Eeyore character. Almost all retarded people make common errors in English and spelling, and many are, from the illness, illiterate. It is sad and not funny. The possibility of artificial or acquired retardation from a crime or accident- like amnesia, is no laughing matter.
Mental retardation is more commonly called Down syndrome or being known as mentally handicapped. It is offensive to say mental retardation or retard.
Overstudy does not cause mental retardation.
TThere are quite high as it comes in different types of mental retardation.
Exposure to lead can also cause mental retardation.
literature review on mental retardation with reference
Mental retardation occurs in 2.5-3% of the general population.
Mental retardation has different levels. There is Mild intellectual disability; moderate intellectual disability; severe intellectual disability; and Profound intellectual disability.https://www.floridahospital.com/mental-retardation-mr/symptoms-and-signs-mental-retardation
The two conditions are not at all related. Autism does not cause mental retardation.
because some ppl are born with birth defects like mental retardation
The old and still popular terms were adjusted downward from normal- Moron ( high and low grade) Imbecile, and Idiot. for some reason Moron and Idiot remain in popular usage but imbecile, even in slang usage is rarely used.
If retardation is caused by chromosomal or other genetic disorders, it is often apparent from infancy.
About one-third of individuals with CP have moderate-to-severe mental retardation, one-third have mild mental retardation, and one-third have normal intelligence.
Single gene defects such as phenylketonuria (PKU) and other inborn errors of metabolism may also cause mental retardation if they are not found and treated early.