How do steroids influence on brain cells?

It is well-known that steroids are utilized by a lot of sportsmen in order to enhance muscle mass and energy. But according to recent studies, administration of steroids is a too harmful aspect for brain cells. Since these preparations induce level of testosterone in body, they influence negatively and even destruct brain cells. This confirmation about destruction of brain cells by enhanced amount of testosterone was approved by a study conducted by Yale School of Medicine that was published in the Journal of Biological Chemistry.
Scientists suggest that abnormal aggressiveness displayed by steroids consumers testify that certain amount of brain cells was destroyed due to taking of steroids.
Barbara Ehrlich, a professor, a leader of a research related to administration of steroids, advices not to condemn those who utilize steroids, when they behave unproperly. It is necessary to know that it must have been not their fault. Steroids must have had fault of abnormal actions of those who utilize these preparations.
The study leaded by Yale School of Medicine displayed that testosterone killed brain cells. One of principal functions of testosterone secreted naturally is following: to destroy brain cells that can be dangerous for the whole body due to their destructions. But when level of this hormone is increased, it destroys not only destructed cells but healthy ones too. It can cause such severe problems, as appearing of Alzheimer's and Huntingdon's disease and others.

Aggressiveness of hamsters due to steroids
Hamsters were recruited in one of researches published in the journal Behavioral Neuroscience. The specialists participated in the research observed effects of anabolic steroids upon the hamsters. The hamsters that were given these medicines became too aggressive. Their brain activity was changed much due to these medications.
The researches concluded that steroids damaged people’s brain the same way as hamsters’ brain. According to their conclusions, people suggest that steroids are forbidden due to their athletic effects. But people must realize that the chief reason is negative influence of these preparations upon human health. Steroids should be applied only for medical purposes by prescriptions of specialists. Steroids use in sports has to be forbidden totally.