Can someone, after having anger to a large level or anxiety to a large level, develop mental retardation?
In simple words, can someone being normal and mental sound, become mentally retarded in just a moment?
Let me explain it more clearly.
Suppose someone is normal but suddenly he sees something, which makes him very anxious and tensed. He has developed anger and lost the happiness he was having.
The thing that I am trying to ask you is: can some psychological causes (thinking, anger, etc.) instantly lead to mental retardation? By retardation, I mean the retarding of thinking ability, planning, cognitive behaviour, and all other parameters of a well-functioning brain.
I searched on Google & found in page 2 of https://www.webmd.com/parenting/baby/intellectual-disability-mental-retardation that genetics, child birth/pregnancy problems, or head injuries are common causes, but with two-thirds of all children who have intellectual disability, the cause is unknown.