TheInfamousArgyle wrote:
Just a musing-
MAYBE it's the reverse, and physical ill causes mental retardation, like in cases of fetal malnutrition (I could be seriously wrong, someone please correct me) the child's brain does not properly develop. The brain is part of the body, and when the body is not constructed properly, the infrastructure of the brain is also unstable.
You are right. Damage or improper contruction damages multiple parts of the fetus, brain included. You gave a very appropriate example of fetal malnutrition (stemming generally from pregnant woman's malnutrition). There's also maternal drug or alcohol use, exposure to enviromental toxins and infectious disease that the mother catches, such as Rubella. Then there are genetic problems which cause pervasive damage, such as Down's Syndrome.