<unk>  is a form of<unk>  that involves a compulsion to engage in a rewarding non-substance-related behavior – sometimes called a natural reward – despite any negative consequences to the person's physical, mental, social or financial well-being.<unk>  canonically refers to substance abuse; however, the term's connotation has been expanded to include behaviors that may lead to a reward (e.g., gambling, eating, or shopping) since the 1990s. A gene transcription factor known as ΔFosB has been identified as a necessary common factor involved in both<unk>  and drug<unk> s, which are associated with the same set of neural adaptations in the reward system.
Behavioral addiction
Listener fatigue
Automatism 
Morbid love
Body substance isolation
Addiction
Psychological dependence
Automatic behavior