Uncertainty, Cognitive Control and Theta-Band Activity: A Relationship That Depends on Metacontrol Requirements

Area of Science:

• Neuroscience
• Cognitive Psychology
• Computational Neuroscience

Background:

• Cognitive control is typically linked to theta band brain activity.
• Increased theta activity is often observed in situations demanding cognitive control due to high uncertainty.
• The role of theta activity when uncertainty triggers curiosity remains unclear.

Purpose of the Study:

• To investigate if theta band activity is implicated in cognitive control when uncertainty evokes curiosity.
• To examine the neural correlates of cognitive control under varying levels of uncertainty.
• To explore how uncertainty modulates brain connectivity and oscillatory dynamics.

Main Methods:

• Utilized a Posner cueing task with manipulated target-related uncertainty in 41 healthy adults.
• Applied time-frequency and beamforming analyses to study oscillatory dynamics and their neural sources.
• Conducted effective connectivity analyses to assess information transfer modulation by uncertainty.

Main Results:

• Behaviorally, participants showed heightened sensitivity to task-irrelevant cues under high uncertainty.
• No significant increase in theta band activity was found in the posterior cingulate cortex under high uncertainty compared to low uncertainty.
• Effective connectivity analyses revealed weaker connections between the inferior parietal lobule and posterior parietal cortex under high uncertainty.
• Alpha band activity in the temporo-parietal junction indicated uncertainty's influence on early attentional filtering.

Conclusions:

• High uncertainty is not consistently associated with increased theta band activity.
• Uncertainty may engage different (meta)control policies, potentially involving distinct oscillatory dynamics.
• Findings suggest a nuanced relationship between uncertainty, curiosity, and cognitive control mechanisms.