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Updated: Feb 14, 2026
09:35
Automatic Detection of Highly Organized Theta Oscillations in the Murine EEG
Published on: March 10, 2017
9.7K
Cognitive control and midline theta adjust across multiple timescales
Lisa K Chinn1, Carolyn S Pauker2, Edward J Golob3
1Department of psychology, Tulane University, United States.
Neuropsychologia
|February 8, 2018
Summary
Cognitive control in conflict situations is influenced by trial sequences and longer block-level factors. Our study shows block-level effects significantly impact behavior and neural activity beyond trial-to-trial adjustments.
Area of Science:
- Cognitive Neuroscience
- Psychology
- Neuroscience
Background:
- Cognitive control is crucial for goal-directed behavior, especially in conflict situations.
- Conflict control operates across different timescales, including successive trials and trial blocks.
- The neural mechanisms underlying these different timescales of conflict control remain unclear.
Purpose of the Study:
- To investigate whether block-level conflict control is driven solely by successive trial adjustments.
- To differentiate the neural mechanisms of sequence-dependent and block-level conflict control.
- To examine the influence of trial base rate manipulations on behavior and neural activity.
Main Methods:
- Young adults performed an auditory Simon task with varying trial compatibility base rates (25%, 50%, 75%).
- Behavioral data (reaction time) and electroencephalography (EEG) were collected.
- Independent Component Analysis (ICA) and quantitative modeling were used to analyze EEG and behavioral data.
Main Results:
- Behavioral reaction times showed both sequence and base rate effects.
- Two fronto-medial ICA components reflected sequence and base rate effects, with distinct theta and alpha band activity.
- Predictive modeling indicated sequence effects explained less than 36% of the variance in behavioral and neural measures.
Conclusions:
- Block-level conflict control is significantly influenced by base rate manipulations, independent of successive trial effects.
- Neural mechanisms, including fronto-medial theta and alpha oscillations, differentiate between sequence and base rate control.
- These findings suggest that cognitive control adapts to broader contextual changes (base rates) beyond immediate trial history.
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