There are two main eating disorders, anorexia Moegling 2 nervosa and bulimia nervosa. ... Anorexia Nervosa is defined as a psychiatric disorder in which a person's distorted body image leads them to believe that they are overweight even when they are dangerously underweight (Kagan, Anorexia 45). ... Bulimia Nervosa is defined as a secretive cycle of binge eating followed by purging. ... Richard Morton first identified anorexia in 1689. ... Moegling 5 Both anorexia and bulimia can be deadly. ...