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A Dual Role for the Dorsolateral Prefrontal Cortex (DLPFC) in Auditory Deviance Detection
Manon E Jaquerod1, Ramisha S Knight2,3, Alessandra Lintas1,4
1NeuroHeuristic Research Group, University of Lausanne, Quartier UNIL-Chamberonne, 1015 Lausanne, Switzerland.
Brain Sciences
|October 25, 2024
Summary
The dorsolateral prefrontal cortex (DLPFC) is crucial for processing unexpected auditory stimuli, even passively. This study reveals its spatiotemporal neurodynamics during deviance perception, highlighting MFG activation patterns.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Auditory Perception
Background:
- The dorsolateral prefrontal cortex (DLPFC) is typically linked to active cognitive tasks.
- Its role in passive auditory deviance perception is not fully understood.
- Spatiotemporal neurodynamics of DLPFC in passive deviance detection require clarification.
Purpose of the Study:
- To investigate the role of the DLPFC in passive auditory deviance perception.
- To elucidate the spatiotemporal neurodynamics of DLPFC during oddball paradigms.
- To explore the shift from pre-attentive to attentive processing in the DLPFC.
Main Methods:
- Simultaneous recording of event-related optical signals (EROS) and event-related potentials (ERPs) over the prefrontal cortex.
- Utilized a 64-channel electroencephalography (EEG) system.
- Employed an auditory oddball paradigm with standard (1000 Hz) and deviant (1500 Hz) tones in 12 healthy adults.
Main Results:
- Deviant stimuli elicited a negative shift in the N1 ERP component (mismatch negativity) and a positive deflection in the P300.
- Detected enhanced neural activity in the left middle frontal gyrus (MFG) coinciding with the MMN.
- Observed later activation in the right MFG corresponding to the P3a ERP component.
Conclusions:
- The DLPFC plays a critical role in processing unexpected auditory stimuli during passive perception.
- Findings suggest a shift in DLPFC function from pre-attentive to attentive processing.
- Further research with larger, diverse samples is needed to confirm generalizability.
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