Resolving mesoscale brainstem-prefrontal-striatal pathways underlying decisions upon salient events using...

Area of Science:

• Neuroscience
• Cognitive Science
• Neuroimaging

Background:

• Value-based decision-making involves complex brain-wide processes.
• Mesoscale neural operations are crucial for immediate decisions but are often unresolved by conventional neuroimaging.

Purpose of the Study:

• To investigate mesoscale neural mechanisms underlying value-based decision-making.
• To dissociate brainstem-prefrontal-striatal pathway operations during choice and outcome processing.
• To explore the role of specific brain nuclei and cortical layers in high-stakes decisions.

Main Methods:

• Utilized submillimeter-resolution 7 Tesla functional MRI (fMRI).
• Employed acquisition-matched anatomical references for precise localization.
• Designed a lottery choice task with salient superhigh stakes.

Main Results:

• Enhanced activity observed in the locus coeruleus, caudate, and prefrontal cortex during superhigh-stake choices.
• Substantia nigra/ventral tegmental area and nucleus accumbens differentiated gains from losses.
• Gray-matter bridges between caudate and putamen correlated with faster response times.
• Laminar fMRI revealed distinct roles for deep prefrontal layers in choice selection and superficial layers in outcome evaluation.

Conclusions:

• A mesoscale framework for human decision-making upon salient events is proposed.
• This framework integrates brainstem modulation, striatal gating, and laminar cortical computation.
• Findings highlight the importance of mesoscale analyses for understanding intricate cognitive processes like decision-making.