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Could Minor Physical Defects Lead to Violent Behavior in Teens?

By Candace Hoffman
WebMD Health News

June 21, 2000 -- Could the potential for violent behavior be programmed into a person from birth? And could it be possible to screen children for violence risk factors, so as to begin early interventions to prevent them from becoming violent in the first place? Those are among the questions raised by a new study from Canada.

Louise Arsenault, PhD, a University of Montreal researcher, says that she and her colleagues may have been able to show that problems during development of babies in the womb may lead to both minor physical defects and brain damage. This brain damage is believed to increase the risk for violent behavior.

But one expert who spoke to WebMD is not sure these findings have any value right now for use in the general community.

Arsenault looked at a large population of adolescent boys in Montreal, who had been followed since kindergarten. She and fellow researchers assessed the boys' delinquent and violent tendencies in their adolescent years by using questionnaires and police crime reports. They also looked at minor physical defects in these boys. Arsenault is now a visiting researcher at the Institute of Psychiatry in London.

She looked at the boys' mouths, ears, eyes, heads, hands, and feet. Very minor physical abnormalities were noted, such as a high, pointed palate; a furrowed tongue; asymmetrical ears; low-set ears; electric, fine hair; a single crease in the palm; and a big gap between the toes.

The researchers found that out of a group of 170 teen boys, those who exhibited violent delinquent behaviors tended to have more physical defects than those who were not violent -- especially abnormalities of the mouth. This could suggest that abnormalities of the mouth are closely associated with brain defects that lead to the higher risk of violence.

"I think that this paper would be useful with doctors, nurses, [and] teachers who could identify the kids at risk at a very early age," Arsenault tells WebMD. She also says that if these abnormalities are associated with fetal development, perhaps better maternal care might have an impact. But her research does not recommend any specific programs.

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