Addiction from the harmful dysfunction perspective: How there can be a mental disorder in a normal brain

Area of Science:

• Medical Philosophy
• Neuroscience
• Addiction Studies

Background:

• Addiction is debated: is it a brain disease or a result of normal learning?
• The National Institute on Drug Abuse (NIDA) views addiction as a brain disease due to observed brain changes.
• Critics argue these changes stem from neuroplasticity, not disease, framing addiction as problematic choices.

Purpose of the Study:

• To evaluate addiction's status as a medical disorder using the harmful dysfunction analysis.
• To explore the evolutionary 'hijack' theory as an alternative explanation for addiction.
• To examine the implications of addiction as a motivational disorder for social responsibility and control.

Main Methods:

• Philosophical analysis of medical disorder criteria (harmful dysfunction analysis).
• Critique of the brain disease model of addiction.
• Evaluation of the evolutionary 'hijack' theory of addiction.

Main Results:

• Even if brain changes are due to neuroplasticity, addiction is not necessarily a matter of nondisordered choice.
• The evolutionary 'hijack' theory offers a framework for addiction as a motivational disorder.
• This perspective suggests addiction can be a disorder without underlying neurological dysfunction.

Conclusions:

• Addiction may be a distinct motivational medical disorder, independent of the brain disease model.
• The 'hijack' theory reframes addiction, impacting views on personal responsibility and societal interventions.
• Understanding addiction as a motivational disorder necessitates a re-evaluation of its causes and management.