Multiple representations of value exist in the primate brain. Specifically, neurons in the orbitofrontal cortex (OFC) encode the value subjects assign to different goods, independently of how the goods are presented or the action necessary to implement choice. Moreover, the representation of value in the OFC is menu invariant-neuronal responses encoding the value of one particular good do not depend on what other goods are available at the same time. In contrast, neurons in parietal cortex are sensitive to the value of a particular location in space or a particular action. Whereas representations of value in OFC are absolute, value signals in parietal cortex are relative-each neuron is modulated by the ratio of the value of the corresponding location/action to the value sum of all locations/actions. Finally, neurons in posterior cingulate cortex appear to encode an ongoing estimate of the subjective value or salience of extra-personal events and actions; these signals may update value-related information in brain areas like the parietal cortex.
|Title of host publication||Neuroeconomics|
|Number of pages||22|
|State||Published - Dec 1 2009|