Neuroanatomical Basis of Addiction: A narrative Review
Keywords:
Addiction, Neuroanatomical, Compulsive, NeuroplasticAbstract
Background: The review titled "A Neuroanatomical Basis of Addiction" explores the complex neurobiological mechanisms that lead to addiction, particularly focusing on the transition from recreational use to substance use disorders. It introduces a heuristic framework that categorizes addiction into three stages: binge/intoxication, withdrawal/negative affect, and preoccupation/anticipation, each linked to specific neurocircuitries. Aim: The aim of the review is to elucidate the neuroanatomical underpinnings of addiction and to discuss how neuroplastic changes contribute to compulsive behaviors associated with substance use disorders. Methodology: The review synthesizes recent advancements in neuroimaging and neurogenetic research, examining the neurochemical pathways and microcircuits involved in addiction-related behaviors. It emphasizes the role of key brain regions, including the basal ganglia, extended amygdala, and prefrontal cortex, in the addiction process. Results: Findings reveal that alterations in incentive salience, emotional regulation, and executive function within these circuits drive the compulsive nature of addiction. The review highlights the significance of individual differences in neurobiology, which can inform targeted interventions. Conclusion: The insights gained from the neuroanatomical framework have important implications for public health policies and prevention strategies, especially amid the ongoing opioid crisis and the legalization of substances like marijuana. The review advocates for a deeper integration of neuroscience in addiction research to enhance clinical practices and recovery outcomes.
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