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Expectations and outcomes: decision-making in the primate brain.

Allison N McCoy¹, Michael L Platt

¹Department of Neurobiology, Duke University Medical Center, 325 Bryan Research Building, Box 3209, Durham, NC 27710, USA.

Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology

|March 11, 2005

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Adapting decision-making to changing rewards involves updating behavioral value representations. Neurons in key brain areas encode expected value, enabling adaptive behavior in dynamic environments.

Area of Science:

Neuroscience
Cognitive Science
Decision Science

Background:

Adapting decision-making strategies to changing reward contingencies is crucial for survival.
The neural mechanisms underlying this adaptive process have been largely unknown.

Purpose of the Study:

To investigate how the brain represents and updates behavioral value.
To identify neural circuits involved in adapting behavior to changing reward contingencies.

Main Methods:

Coupling economic theory with neurophysiological techniques.
Recording neural activity in various brain regions during tasks involving fluid reinforcement and visually-guided eye movements.

Main Results:

Neurons in parietal cortex, prefrontal cortex, basal ganglia, and superior colliculus encode the expected value of targets.

Related Experiment Videos

Midbrain dopaminergic neurons signal reward prediction errors.

Posterior cingulate cortex neurons link reward outcomes with oculomotor behavior, suggesting a role in updating orienting value.

Conclusions:

The brain explicitly represents behavioral value, facilitating adaptation to changing environments.
A network of brain areas, including the posterior cingulate cortex, is involved in updating value estimates and guiding adaptive behavior.