Abnormal frontostriatal activity in recently abstinent cocaine users during implicit moral processing.

Area of Science:

• Neurobiology
• Moral Psychology
• Addiction Neuroscience

Background:

• Moral cognition research often studies psychopathy, characterized by diminished moral emotions.
• Cocaine abuse frequently co-occurs with psychopathy and shares socio-affective processing deficits.
• Cocaine-dependent individuals remain understudied in moral psychology.

Purpose of the Study:

• To investigate the neural underpinnings of moral cognition in individuals with regular cocaine use.
• To compare brain activity during moral processing between cocaine users and non-users.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
• 306 incarcerated males were studied, divided into regular cocaine users (n=87) and matched non-users (n=87).
• Participants viewed images depicting moral and non-moral scenarios, performing an indoor/outdoor judgment task.

Main Results:

• Cocaine users exhibited abnormal frontostriatal neural activity during implicit moral picture processing.
• Reduced discrimination between moral and non-moral pictures was observed in the ventral anterior cingulate cortex (vACC), ventromedial prefrontal cortex (vmPFC), lateral orbitofrontal cortex (lOFC), and left ventral striatum (vSTR).
• Psychopathy showed a negative correlation with activity in the anterior cingulate cortex (ACC) and right ventral striatum (vSTR).

Conclusions:

• Regular cocaine abuse is associated with affective deficits that may impair higher-level cognitive processes like moral cognition.
• Findings highlight the impact of cocaine dependence on socio-affective processing and moral reasoning.
• The study identifies specific frontostriatal regions affected by cocaine use relevant to moral judgment.