Dark family dementia.. A mental state of weakness due to illness in the nervous system leads to the condition after growth may be together during the first year of life of the child

Dark family dementia:
A mental state of weakness due to illness in the nervous system leads to the condition after growth may be together during the first year of life of the child. This condition is hereditary. In which the nerve cells are affected and swollen and swollen and filled with fat leading to blindness and mental weakness until dementia. It may be accompanied by paralysis, convulsions, epilepsy, loss of emotional control and often death.