Run's in Family
Manifestations may range from normal intellect, as with case of benign familial megalencephaly, to severe mental retardation and seizures, as with Alexander disease, an inherited leukodystrophy
Pseudo-retardation would be something that resembles or looks like retardation, but actually isn't. The term literally means, fake retardation.
No a dimple is not a sign of retardation.
Retardation = change in vel / time taken
Overstudy does not cause mental retardation.
Retardation - 2015 was released on: USA: 2015
Familial - album - was created in 2001.
The first spelling is correct: "Retardation."
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
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