ABSTRACT
This chapter discusses the symptoms associated with anorexia nervosa and bulimia nervosa (BN), risk factors, leading explanations for these disorders, and best current treatments. Several techniques have been used by different groups of researchers to assess perceived body size. A binge is an excessive amount of food eaten within a limited amount of time. Some people with BN have symptoms of borderline personality disorder, which is characterized by emotional instability and impulsiveness. Several groups of researchers have found evidence implicating a role of the genes involved in the synthesis of the neurotransmitter serotonin and its receptors in eating disorders. From the cognitive perspective in the field of psychology, their maladaptive and negative thoughts lead to attempts to restrain eating and lose weight. Only a small percentage of people with eating disorders receive treatment, and an even smaller percentage completes the recommended therapeutic phases.
