Habit formation: implications for alcoholism research

Area of Science:

• Behavioral neuroscience
• Neurobiology of addiction
• Alcoholism research

Background:

• Severe alcohol use disorder is characterized by compulsive alcohol seeking and continued use despite negative consequences.
• Two key mechanisms, goal-directed (action-outcome) and habitual (stimulus-response), underlie the seeking of reinforcers like alcohol.
• Substance use disorders may disrupt these mechanisms, leading to continued use irrespective of outcomes.

Purpose of the Study:

• To critically analyze literature on habit formation in behavioral neuroscience alcoholism research.
• To explore how alcohol use impacts the goal-directed and habitual mechanisms of behavior.
• To suggest future research directions for understanding and treating alcoholism.

Main Methods:

• Literature review of behavioral neuroscience research on habit formation and alcoholism.
• Analysis of corticostriatal mechanisms in instrumental behavior acquisition and practice.
• Examination of the role of dopaminergic signaling in habit formation and drug abuse.

Main Results:

• Alcohol use appears to expedite habit formation and promote habitual behavior through dopamine release.
• Alcohol history alters striatal morphology and enhances habit learning, even for non-psychoactive reinforcers.
• Alcohol consumption can persist despite aversive adulterants, suggesting a disruption of devaluation mechanisms.

Conclusions:

• Habit formation plays a significant role in the perseverative alcohol seeking characteristic of alcoholism.
• Further research into habit formation and related perseverative behaviors is vital for identifying genetic factors, neural correlates, and potential treatments.
• Modifications in research models, including the use of high-drinking rodent lines and refined devaluation techniques, are needed to advance alcoholism research.