The enigma of twins

The behavior of the four Genain twin sisters, born in the U.S. in 1930, drew the attention of psychiatrists at the time.
As a child, Hester broke light bulbs and was booted ios buttons; Nora gems during meals and put on their knees and elbows to bleed, with 22 years, Iris stopped working because he felt "trapped"; Myra was better, but are easily frightened and reassure her hard work.

The four were diagnosed with schizophrenia, which seemed to prove the importance of genetic factors, since the probability that the disorder affects four people chosen at random is 1 in 100 million.

Moreover, the degree of gravity was different in each one, which indicated the presence of other factors, but what?

The psychologist David Ro-senthal explained the differences in degree from family relationships, as Myra, the less sick, was the favorite of the mother, and Hester, the most serious, since girl was labeled as "bad".

For his part, the neuropsychologist Alian F. Mirsky discovered that the twins through tomography most affected also showed more abnormalities in their brain activity and that their frontal lobes, which act as a focal point for information, were weaker and less energy consuming than those of their sisters.

According Mirsky, Genain suffered varying degrees of injuries due to the order of their birth. Nora could suffer trauma as the first to pass through the uterus and Hester, most recently, by lack of oxygen.

The brain scanner in a recent case of twins, Elmore, proved that the ventricles of Steven, schizophrenic, had thicker tissue and neuro-nal thinner than the mentally healthy David.