The Behavioral Relevance of Task Information in Human Prefrontal Cortex

Area of Science:

• Neuroscience
• Cognitive Psychology

Background:

• The lateral prefrontal cortex (LPFC) is implicated in cognitive flexibility, especially for novel tasks.
• The precise contribution of LPFC's neural representations to successful performance in novel situations is not fully understood.

Purpose of the Study:

• To investigate whether LPFC's representation of task-relevant information contributes to successful performance during novel task execution.
• To identify novelty-sensitive brain regions involved in cognitive flexibility.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
• Pattern classification analyses were applied to fMRI data.
• Participants performed 64 complex tasks, with 60 being novel, while switching between them rapidly.

Main Results:

• Three novelty-sensitive regions in the left anterior LPFC showed distinct activity patterns.
• These patterns could discriminate between correct and error trials.
• Task-relevant decision rule information was present in these regions, but only for successful trials.

Conclusions:

• The left anterior LPFC plays a key role in cognitive flexibility for novel tasks.
• This brain region appears critical for representing task information essential for successful performance in new situations.