Eating disorder portion of the vulnerability to develop eating disorders can be inherited, and there is evidence to show that there is a genetic locus that shows susceptibility for developing anorexia nervosa. About 60% of eating disorder cases are attributable to biological and genetic components. Other cases are due to external reasons or developmental problems. There are also other neurobiological factors at play tied to emotional reactivity and impulsivity that could lead to binging and purging behaviors. Epigenetics: Epigenetic mechanisms are means by which environmental effects alter gene expression via methods such as DNA methylation; these are independent of and do not
Eating Disorder Inventory to the Eating disorder inventory was in 1991. The 1991 version, Eating disorder inventory-two (EDI-2) is used for both males and females over age 12. The EDI-2 retains the original format of the EDI with the inclusion of 27 new items divided into three additional subscales:<br> 1. Asceticism: Reflects the avoidance of sexual relationships<br> 2. Impulse Regulation: Shows the ability to regulate impulsive behavior, especially the binge behaviour<br> 3. Social Insecurity: Estimates social fears and insecurity The latest revision to the Eating disorder inventory; Eating disorder inventory-three (EDI-3) was released in 2004. It contains the original items of the first