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The Orbitofrontal Cortex$
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David Zald and Scott Rauch

Print publication date: 2006

Print ISBN-13: 9780198565741

Published to Oxford Scholarship Online: February 2010

DOI: 10.1093/acprof:oso/9780198565741.001.0001

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The chemical senses

The chemical senses

(p.125) Chapter 6 The chemical senses
The Orbitofrontal Cortex

Jay A. Gottfried

Dana M. Small

David H. Zald

Oxford University Press

The orbitofrontal cortex (OFC) is described as secondary olfactory and gustatory cortex. This chapter reviews the location of chemosensory processing in the OFC as defined by anatomical and neurophysiological methods in nonhuman primates, and neuroimaging and lesion data in humans. The human neuroimaging data suggest that broader areas of the OFC are involved in chemosensory processing than would be predicted from a strict anatomical analysis of input from primary olfactory/gustatory cortex. The properties of chemosensory processing in the OFC are discussed in terms of the breadth of tuning of sensory cells, the role of hedonics, and the dynamic nature of coding (response to satiety). Issues of functional lateralization and medial vs. lateral distinctions in hedonic processing are also covered. Finally, topics related to multisensory integration are covered.

Keywords:   olfaction, olfactory, gustatory, taste, multisensory integration, satiety, hedonics

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