Addictive disorders
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Understanding Addictive Disorders: Insights from Recent Research
Prevalence and Global Impact of Addictive Disorders
Addictive disorders, encompassing both substance and behavioral addictions, affect a significant portion of the global population. In 2016, over 1 billion people worldwide were impacted by mental and addictive disorders, contributing to 7% of the global burden of disease and 19% of all years lived with disability . The prevalence of these disorders is notably higher in high- and upper-middle-income countries, partly due to stigma and lack of treatment .
Internet Addiction: A Growing Concern
Internet addiction, characterized by excessive or poorly controlled preoccupations, urges, or behaviors regarding computer use and Internet access, has been proposed for inclusion in the Diagnostic and Statistical Manual of Mental Disorders (DSM) . Surveys in the United States and Europe indicate prevalence rates between 1.5% and 8.2%, with high comorbidity with psychiatric disorders such as depression, anxiety, and ADHD . Factors predictive of problematic Internet use include personality traits, familial factors, alcohol use, and social anxiety .
Genetic and Neurobiological Underpinnings of Addiction
Addictions are complex diseases influenced by both genetic and environmental factors. Genetic studies have helped destigmatize addiction and have paved the way for individualized prevention and treatment strategies . Neurobiological research supports the brain disease model of addiction, highlighting changes in brain reward circuits, stress reactivity, and executive function that contribute to the compulsive nature of addiction Longo2016Koob2009. These neuroadaptive changes are key elements in relapse and chronicity of the disorder .
Behavioral Addictions: Similarities to Substance Use Disorders
Behavioral addictions, such as gambling and Internet gaming, share many similarities with substance use disorders, including natural history, phenomenology, tolerance, comorbidity, and neurobiological mechanisms Grant2010Petry2018. The DSM-5 has recognized gambling disorder as a behavioral addiction and included Internet gaming disorder in its research appendix, reflecting the growing evidence supporting their classification as mental disorders .
Adolescent Addictive Disorders
Adolescents are particularly vulnerable to addictive disorders, both substance-related and behavioral. These disorders in youth are characterized by high rates of experimentation and risky behaviors, often leading to significant impairment . Effective treatment for adolescents includes psychosocial interventions and, where applicable, pharmacologic management .
Conclusion
Addictive disorders, whether substance-related or behavioral, represent a significant global health challenge. Advances in genetic and neurobiological research have deepened our understanding of these disorders, supporting the brain disease model of addiction. Recognizing and appropriately categorizing behavioral addictions can lead to improved prevention and treatment strategies, ultimately reducing the burden of these disorders on individuals and society.
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Neurobiologic Advances from the Brain Disease Model of Addiction
Recent advances in neuroscience support the brain disease model of addiction, offering new opportunities for prevention and treatment of substance addictions and related behavioral addictions.
Neurocircuitry of Addiction
Drug addiction involves neuroplasticity in various brain structures, leading to three stages: binge/intoxication, withdrawal/negative affect, and preoccupation/anticipation (craving).
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