Domain general frontoparietal regions show modality-dependent coding of auditory and visual rules

Area of Science:

• Cognitive neuroscience
• Neuroimaging
• Human cognition

Background:

• Human cognition allows flexible behavioral responses based on current goals, associating stimuli with actions.
• The frontoparietal "multiple demand" circuit is considered domain-general, supporting various cognitive tasks.
• It remains unclear if this circuit processes information in a modality-general or modality-specific manner.

Purpose of the Study:

• To investigate how the frontoparietal circuit represents task rules across different sensory modalities (visual and auditory).
• To distinguish between modality-general abstract representations and modality-tagged representations within this cognitive circuit.

Main Methods:

• Utilized a stimulus-response task with conceptually identical rules presented in both visual and auditory modalities.
• Applied multivariate decoding techniques to functional magnetic resonance imaging (fMRI) data.
• Analyzed neural representations of task rules across sensory inputs.

Main Results:

• Neural representations for visual and auditory rules engaged overlapping neural resources within the frontoparietal circuit.
• Despite overlapping resources, these representations were expressed in modality-tagged, non-generalizable neural codes.
• The findings indicate distinct neural coding for each sensory modality, even with identical task rules.

Conclusions:

• The frontoparietal multiple demand system utilizes shared neural resources for diverse tasks.
• However, it does not generate modality-general representations of task rules.
• Cognitive flexibility relies on modality-specific coding within a shared neural architecture.