Neural encoding of choice during a delayed response task in primate striatum and orbitofrontal cortex

Area of Science:

• Neuroscience
• Cognitive Science
• Decision Science

Background:

• Reward-based decisions involve complex cognitive processes.
• The brain must encode contextual factors influencing choice, such as the number of options and timing.
• Orbitofrontal cortex and striatum are implicated in encoding reward value and preference.

Purpose of the Study:

• To investigate how neural activity in the orbitofrontal cortex and striatum is modulated by choice contexts.
• To compare neural responses during tasks with and without choice to understand context encoding.
• To determine if neural signals predict outcome selection based on choice situation.

Main Methods:

• Recorded neural activity in orbitofrontal cortex and striatum.
• Compared neural responses between a two-choice task and a one-option task.
• Analyzed neural signals from instruction cue presentation to movement execution.

Main Results:

• Orbitofrontal and striatal neural responses were sensitive to the decision-making process in choice situations.
• Neural signals preceding choice were selective for the choice context.
• These signals potentially reflect the chosen value and encode task-embedded choice context.

Conclusions:

• Neural activity in the orbitofrontal cortex and striatum encodes choice context, not just reward value.
• The brain differentiates between situations involving choice and those without, adapting neural processing accordingly.
• These findings advance our understanding of the neural basis of adaptive decision-making and value representation.