Taste area in granular and dysgranular insular cortices in the rat identified by stimulation of the entire oral cavity

Ogawa, Hisashi; Ito, Shin‐ichi; Murayama, Nobuki; Hasegawa, Kayoko

doi:10.1016/0168-0102(90)90004-x

Cited by 74 publications

(31 citation statements)

References 15 publications

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“…The primary gustatory cortex is identified as the area overlapping the granular and the disgranular zones of the insula (Ogawa et al, 1990). The more ventral agranular zone of this cortical area is a particular target of projections for primary olfactory areas (Shipley and Geinisman, 1984;Krushel and Van Der Kooy, 1988;Sewards and Sewards, 2001).…”

Section: An Effective Cs-us Association Duringmentioning

confidence: 99%

The Way an Odor Is Experienced during Aversive Conditioning Determines the Extent of the Network Recruited during Retrieval: A Multisite Electrophysiological Study in Rats

Chapuis¹,

Garcia²,

Messaoudi³

et al. 2009

J. Neurosci.

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Recent findings have revealed the importance of orthonasal and retronasal olfaction in food memory, especially in conditioned odor aversion (COA); however, little is known about the dynamics of the cerebral circuit involved in the recognition of an odor as a toxic food signal and whether the activated network depends on the way (orthonasal vs retronasal) the odor was first experienced. In this study, we mapped the modulations of odor-induced oscillatory activities through COA learning using multisite recordings of local field potentials in behaving rats. During conditioning, orthonasal odor alone or associated with ingested odor was paired with immediate illness. For all animals, COA retrieval was assessed by orthonasal smelling only. Both types of conditioning induced similarly strong COA. Results pointed out (1) a predictive correlation between the emergence of powerful beta (15-40 Hz) activity and the behavioral expression of COA and (2) a differential network distribution of this beta activity according to the way the animals were exposed to the odor during conditioning. Indeed, for both types of conditioning, the aversive behavior was predicted by the emergence of a strong beta oscillatory activity in response to the odor in the olfactory bulb, piriform cortex, orbitofrontal cortex, and basolateral amygdala. This network was selectively extended to the infralimbic and insular cortices when the odor was ingested during acquisition. These differential networks could participate in different food odor memory; these results are discussed in line with recent behavioral results that indicate that COA can be formed over long odor-illness delays only if the odor is ingested.

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Section: An Effective Cs-us Association Duringmentioning

confidence: 99%

The Way an Odor Is Experienced during Aversive Conditioning Determines the Extent of the Network Recruited during Retrieval: A Multisite Electrophysiological Study in Rats

Chapuis¹,

Garcia²,

Messaoudi³

et al. 2009

J. Neurosci.

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“…GC neurons respond to chemical stimuli representing the five taste modalities, salty, sour, bitter, sweet, and umami (taste of glutamate) (Yamamoto et al, 1980;Ogawa et al, 1990;Stapleton et al, 2006) but also to textures and viscosity (Katz et al, 2001;Verhagen et al, 2004) and to the palatability (ingestion/rejection) of a tastant (Yamamoto et al, 1989). The GC also plays a role in the acquisition and retention of conditioned taste aversion (Yamamoto et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Differential Spatial Representation of Taste Modalities in the Rat Gustatory Cortex

Accolla¹,

Bathellier²,

Petersen³

et al. 2007

J. Neurosci.

178

175

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Discrimination between foods is crucial for the nutrition and survival of animals. Remarkable progress has been made through molecular and genetic manipulations in the understanding of the coding of taste at the receptor level. However, much less is known about the cortical processing of taste sensation and the organizing principles of the gustatory cortex (GC). Using genetic tracing, it has recently been shown that sweet and bitter taste are processed through segregated neuronal circuitries along the gustatory pathway up to the cortical level. This is in disagreement with the evidence that GC neurons recorded in both anesthetized and behaving animals responded to multiple taste modalities (including sweet and bitter). To investigate the functional architecture of the GC in regard to taste modalities, we used in vivo intrinsic optical imaging, a technique that has been successfully applied to explore the organization of other neocortical regions. We found that four of the primary taste modalities (sweet, bitter, salty, and sour) are represented by distinctive spatial patterns but that no region was specific to a single modality. In addition, we found that two tastants of similar hedonic value (pleasant or unpleasant) activated areas with more common regions than two tastants with opposite hedonic value. In summary, we propose that these specific cortical patterns can be used to discriminate among various tastants.

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“…Right MCAO-damage to the insula and adjacent frontoparietal cortex in rats, significantly increased blood pressure, renal sympathetic nerve activity and plasma norepinephrine levels was compared with left MCAO and controls [69,108].…”

Section: The Primary Viscerosensory Cortex Within the Insular Cortexmentioning

confidence: 99%

“…The gustatory area within the IC is localized in the dysgranular insular cortex [21,29], roughly between the rhinal fissure and the medial cerebral artery (MCA) -an area that has also been identified in the rat as taste-responsive using intrinsic signal imaging [141] and electrophysiological recordings [7,28,69,140,[142][143][144].…”

Section: The Primary Taste Cortex Within the Insular Cortexmentioning

confidence: 99%

See 1 more Smart Citation

The Insular Cortex and the Amygdala: Shared Functions and Interactions

Moraga-Amaro¹,

Stehberg²

2012

The Amygdala - A Discrete Multitasking Manager

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Taste area in granular and dysgranular insular cortices in the rat identified by stimulation of the entire oral cavity

Cited by 74 publications

References 15 publications

The Way an Odor Is Experienced during Aversive Conditioning Determines the Extent of the Network Recruited during Retrieval: A Multisite Electrophysiological Study in Rats

The Way an Odor Is Experienced during Aversive Conditioning Determines the Extent of the Network Recruited during Retrieval: A Multisite Electrophysiological Study in Rats

Differential Spatial Representation of Taste Modalities in the Rat Gustatory Cortex

The Insular Cortex and the Amygdala: Shared Functions and Interactions

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