Anterior cingulate cortex supports effort allocation towards a qualitatively preferred option.

Area of Science:

• Neuroscience
• Decision-making
• Behavioral Economics

Background:

• The anterior cingulate cortex (ACC) is implicated in effortful choice.
• Its role in evaluating qualitatively different rewards, beyond mere quantity, remains unclear.
• Understanding ACC function is vital for comprehending complex decision-making processes.

Purpose of the Study:

• To investigate the ACC's role in cost-benefit evaluation of qualitatively different rewards.
• To assess how ACC lesions affect motivated behavior and effort expenditure.
• To differentiate ACC function from striatal roles in motivation.

Main Methods:

• Rats underwent excitotoxic NMDA lesions of the ACC or sham surgeries.
• Behavior was assessed on a progressive ratio schedule for preferred sucrose pellets versus concurrent chow availability.
• Tests included evaluating devaluation effects and preference when options were freely available.

Main Results:

• ACC lesions significantly decreased effort (lever presses) for preferred sucrose pellets.
• Chow consumption and food preference remained unaffected by ACC lesions.
• ACC-lesioned rats demonstrated intact devaluation effects and effort expenditure when chow was absent.

Conclusions:

• The ACC is critical for motivating effort towards qualitatively preferred rewards.
• ACC lesions impair cost-benefit analysis for choice, not general motivation or learning.
• These findings highlight the ACC's specific role in effort-based decision-making.