Bulimia and the Brain
Sunday, November 23rd, 2008Bulimia and the brain was the topic of a report released in January 2008 by General Psychiatry. The report focused on female patients with bulimia nervosa and their lack of impulse control compared to women without an eating disorder. The use of MRI brain scan showed distinct behavioral differences when faced with decisions about voluntary behavior.
Bulimia nervosa plagues adolescent females and continues into adulthood. Most professionals agree that binge eating is triggered by a sense of loss of control. The act of binge eating and then subsequent voiding of food gives the sufferer a feeling of regaining that control.
During testing the MRI was able to observe the function of electrical currents that travel throughout nerve cells in the brain. The particular circuitry studied, controlled an individual’s voluntary behavior. The testing forced the individual to make decisions that went contrary to the subject’s normal thinking process. Testing was conducted with 20 women suffering with bulimia and 20 women with normal eating habits.
Test results showed the women that suffered with bulimia responded quicker and made more errors than the control group. The bulimic women when faced with conflicted reasoning showed less activity in the brain circuitry controlling voluntary behavior.
Conclusions reached during testing showed the differences in the way the brain circuits moved and how they performed. The brain activity of the women with bulimia nervosa does not seem to activate appropriately; this would imply a lack of impulse control and also an inability to make the right decision when faced with binge eating behavior.