Expertise Related Changes in Resting-State Functional Connectivity Patterns Following a Clinical Reasoning and...

Area of Science:

• Neuroscience
• Cognitive Science
• Medical Education

Background:

• Diagnostic expertise in medicine is crucial for effective patient care.
• Understanding the neural underpinnings of clinical decision-making can inform training strategies.
• Expertise is thought to involve distinct cognitive and neural processes compared to novice performance.

Purpose of the Study:

• To investigate the behavioral and neural correlates of clinical decision-making in expert gastroenterologists versus novice medical students.
• To determine how diagnostic expertise is reflected in brain activity before and after a decision-making task.
• To identify differences in brain connectivity associated with expertise.

Main Methods:

• Participants completed a clinical decision-making task with behavioral measures (accuracy, response time).
• Resting-state fMRI was acquired immediately before and after the task.
• Seed-based connectivity and partial least squares (PLS) analyses focused on the frontopolar prefrontal cortex (FPPFC) network.

Main Results:

• Experts demonstrated superior accuracy and speed, particularly on easier cases, indicating enhanced cognitive efficiency.
• Post-task, experts showed increased FPPFC connectivity with the paracingulate gyrus (executive control network), while novices connected with the posterior cingulate cortex (default mode network).
• PLS analysis revealed experts engaged executive/attentional networks post-task, whereas novices activated default mode network regions.

Conclusions:

• Clinical expertise is linked to sustained engagement of goal-directed neural networks post-task, suggesting ongoing cognitive evaluation.
• Novices tend to disengage from the task and revert to internally directed thought processes.
• Distinct neural mechanisms underlie the development and maintenance of diagnostic expertise.