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Abstract deliberation by visuomotor neurons in prefrontal cortex
Julie A Charlton1,2, Robbe L T Goris3
1Center for Perceptual Systems, The University of Texas at Austin, Austin, TX, USA.
Nature Neuroscience
|April 29, 2024
Summary
The prefrontal cortex first forms perceptual choices for ambiguous stimuli, then plans actions. These findings suggest prefrontal circuits support abstract reasoning beyond motor planning.
Area of Science:
- Neuroscience
- Cognitive Science
Background:
- The prefrontal cortex is crucial for linking sensory information to motor actions, especially during ambiguous situations requiring deliberation.
- It remains unclear if this deliberation involves competition between stimulus interpretations or motor plans.
Purpose of the Study:
- To investigate how neural populations in the prefrontal cortex represent perceptual choices and motor plans during ambiguous visual tasks.
- To determine if deliberation in the prefrontal cortex is stimulus- or action-based.
Main Methods:
- Recorded neural population activity in the prefrontal cortex of macaque monkeys.
- Monkeys performed a task involving flexible reporting of perceptual judgments on ambiguous visual stimuli.
Main Results:
- Neural activity initially represented the formation of a perceptual choice.
- Activity then transitioned to represent the motor plan.
- Stimulus strength and prior expectations influenced perceptual choice formation, but not action plan formation.
Conclusions:
- Prefrontal cortex circuits involved in action selection also support abstract reasoning.
- These circuits can deliberate abstract propositions independent of specific motor plans.
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