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Correlating Behavioral Responses to fMRI Signals from Human Prefrontal Cortex: Examining Cognitive Processes Using Task Analysis
Published on: June 20, 2012
Brain activity related to the ability to inhibit previous task sets: an fMRI study
Anson J Whitmer1, Marie T Banich
1Department of Psychology, Stanford University, CA, USA. whitmera@stanford.edu
Cognitive, Affective & Behavioral Neuroscience
|September 8, 2012
Summary
Individuals better at task switching show increased basal ganglia and premotor cortex activity. This suggests these brain regions are crucial for inhibiting previous task demands during cognitive flexibility.
Area of Science:
- Cognitive Neuroscience
- Neuroscience
Background:
- Task switching involves inhibiting old task representations and activating new ones.
- Backward inhibition (BI) is the current method to measure task set inhibition, showing increased response times after task abandonment.
- Directly isolating brain activity for task set inhibition has been challenging.
Purpose of the Study:
- To investigate the neural correlates of task set inhibition.
- To examine how brain activity during task switching differs between individuals with varying abilities in task set inhibition.
Main Methods:
- Utilized functional magnetic resonance imaging (fMRI) to measure brain activity.
- Assessed individual differences in task set inhibition using the backward inhibition (BI) paradigm.
- Correlated brain activity during task switching with BI performance.
Main Results:
- Individuals with superior task set inhibition showed greater activity in the basal ganglia.
- Enhanced activity in the supplementary motor area/premotor area was observed in those proficient at inhibiting previous task sets.
- These findings link specific brain regions to the cognitive process of task set inhibition.
Conclusions:
- The basal ganglia and supplementary motor area/premotor area are implicated in the neural mechanisms of task set inhibition.
- Individual differences in task set inhibition are reflected in distinct patterns of brain activation.
- This study provides novel insights into the neural basis of cognitive flexibility and executive function.
