The effect of "biochemical" factors on the upward trend of the age-crime curve of juvenile delinquents

At the same time with new wave of medical advances in various fields of genetic psychology, molecular genetics, biochemistry, behavioral neurology and so on, theoretical criminology has witnessed the revival of biological thoughts. Meanwhile, analyzing the age-crime curve of adolescents, as one of the most exciting fields of criminological studies, has long been considered by criminal biologists, since it is believed that the sudden increase in antisocial behaviors of adolescents, is more caused by physiological changes occurred during puberty than social variables. In this regard, although most researches have been done in the field of neurology, and in particular, the role of the "prefrontal cortex of the brain", but, this does not mean that the impact of biochemical factors on the sudden escalation of delinquency among adolescents is ignored.
In general, the biochemical factors affecting ascending trend of adolescent’s age-crime curve can be divided into two types: "internal factors" and "external factors". Several criminological researches suggest that, for enhancing the criminal statistics during teenage years, increasing secretion of sex hormones during adolescence, such as testosterone in men that is associated with increased levels of aggression, and estrogen in women, which correlates with the intensification of antisioncal behaviors, is considered as one of the most important internal factors, on one hand; and the reluctance of adolescents to use "proper nutrition" that causes changes in body chemistry, and their tendency to use "drugs" and "alcoholic drinks" which leads to intensifying impulse behaviors, are the most significant external factors, on the other hand.