What is the psychological disorder involving excessive eating followed by fasting or food refusal?

Bulimarexia is a term that combines aspects of bulimia nervosa and anorexia nervosa. It describes a psychological disorder in which individuals engage in excessive eating, similar to bulimia, but then follow it with fasting or food refusal, which aligns with the behaviors seen in anorexia. This disorder is characterized by a cycle of binge eating and subsequent compensatory behaviors aimed at weight control, including starvation or extreme caloric restriction.

The other options represent different eating behaviors or disorders. Bulimia involves binge eating followed by purging, but it doesn't necessarily include the fasting component that is pivotal in bulimarexia. Orthorexia focuses on an unhealthy obsession with eating foods that one considers healthy, rather than the binge-purge cycle. Emotional eating refers to the practice of consuming large quantities of food in response to emotional stress rather than physiological hunger, which does not encompass the cycles of fasting and food refusal seen in bulimarexia.