Gustatory coding in the precentral extension of area 3 in Japanese macaque monkeys; comparison with area G

Hirata, Shinichi; Nakamura, Tomofumi; Ifuku, Hirotoshi; Ogawa, Hisashi

doi:10.1007/s00221-005-2321-y

Cited by 18 publications

(16 citation statements)

References 30 publications

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“…Furthermore, we have shown that temperature modulates neural responses to chemical stimulation (Breza et al, 2006). We delivered solutions to the tongue adapted to 35°C AS (Hirata et al, 2005), at low flow rate equivalent to a rat's normal rate of consumption and without confounding tactile and thermal artifacts. Under these limited conditions, the peripheral gustatory system seems to rely more on spike rate during stimulation than on spike timing for coding.…”

Section: Discussionmentioning

confidence: 99%

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Spike Rate and Spike Timing Contributions to Coding Taste Quality Information in Rat Periphery

Lawhern¹,

Nikonov²,

Wu³

et al. 2011

Front. Integr. Neurosci.

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There is emerging evidence that individual sensory neurons in the rodent brain rely on temporal features of the discharge pattern to code differences in taste quality information. In contrast, investigations of individual sensory neurons in the periphery have focused on analysis of spike rate and mostly disregarded spike timing as a taste quality coding mechanism. The purpose of this work was to determine the contribution of spike timing to taste quality coding by rat geniculate ganglion neurons using computational methods that have been applied successfully in other systems. We recorded the discharge patterns of narrowly tuned and broadly tuned neurons in the rat geniculate ganglion to representatives of the five basic taste qualities. We used mutual information to determine significant responses and the van Rossum metric to characterize their temporal features. While our findings show that spike timing contributes a significant part of the message, spike rate contributes the largest portion of the message relayed by afferent neurons from rat fungiform taste buds to the brain. Thus, spike rate and spike timing together are more effective than spike rate alone in coding stimulus quality information to a single basic taste in the periphery for both narrowly tuned specialist and broadly tuned generalist neurons.

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Section: Discussionmentioning

confidence: 99%

“…AS (Hirata et al, 2005; 15 mM NaCl, 22 mM KCl, 3 mM CaCl2, and 6 mM MgCl 2 ; pH 5.8) served as the rinse solution and solvent for the basic taste stimuli. All chemicals were reagent grade.…”

Section: Methodsmentioning

confidence: 99%

Spike Rate and Spike Timing Contributions to Coding Taste Quality Information in Rat Periphery

Lawhern¹,

Nikonov²,

Wu³

et al. 2011

Front. Integr. Neurosci.

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“…Thus, anatomically, there are two “primary” thalamo-cortical gustatory projections; in terms of anterior/posterior orientation, one would be located anteriorly and one in a more middle/posterior region of the insula/operculum area. However, the latter’s existence and exact location are controversial and relatively little is known about gustatory coding in this area (but see Hirata et al 2005). Signals from the AIFO project to medial orbitofrontal cortex (mOFC) and lOFC (Baylis, et al 1995; Carmichael and Price 1995; Pritchard, et al 2005), and the amygdala (Aggleton, et al 1980; Mufson, et al 1981).…”

Section: Introductionmentioning

confidence: 99%

Identification of human gustatory cortex by activation likelihood estimation

Veldhuizen¹,

Albrecht²,

Zelano³

et al. 2011

Human Brain Mapping

179

151

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Over the last two decades, neuroimaging methods have identified a variety of taste-responsive brain regions. Their precise location, however, remains in dispute. For example, taste stimulation activates areas throughout the insula and overlying operculum, but identification of subregions has been inconsistent. Furthermore, literature reviews and summaries of gustatory brain activations tend to reiterate rather than resolve this ambiguity. Here we used a new meta-analytic method [activation likelihood estimation (ALE)] to obtain a probability map of the location of gustatory brain activation across fourteen studies. The map of activation likelihood values can also serve as a source of independent coordinates for future region-of-interest analyses. We observed significant cortical activation probabilities in: bilateral anterior insula and overlying frontal operculum, bilateral mid dorsal insula and overlying Rolandic operculum, and bilateral posterior insula/parietal operculum/postcentral gyrus, left lateral orbitofrontal cortex (OFC), right medial OFC, pregenual anterior cingulate cortex (prACC) and right mediodorsal thalamus. This analysis confirms the involvement of multiple cortical areas within insula and overlying operculum in gustatory processing and provides a functional “taste map” which can be used as an inclusive mask in the data analyses of future studies. In light of this new analysis, we discuss human central processing of gustatory stimuli and identify topics where increased research effort is warranted.

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“…Also in that study, the tongue representation was likely to receive an additive projection from the lateral surface of the frontal operculum near the lateral sulcus, although the investigators did not particularly emphasize this. This region may presumably correspond to the precentral extension of area 3, which was also implicated in gustatory function [22,23].…”

Section: Representation Of Orofacial Structures In Area 3bmentioning

confidence: 99%

The Ventral Primary Somatosensory Cortex of the Primate Brain: Innate Neural Interface for Dexterous Orofacial Motor Control

Tsuruo

Kudo

2015

Interface Oral Health Science 2014

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Studies using nonhuman primates have made marked contributions to our understanding of the anatomy and function of the primary somatosensory cortex (SI). Its ventral or inferolateral part (vSI) represents orofacial structures, such as the lips, periodontium, tongue, palate, chewing musculature, etc. This brain region is neurally interconnected with the ventral part of the primary motor cortex that executes voluntary orofacial movements. Also within the vSI, regions representing different orofacial structures are interconnected with each other. Therefore, in selfgenerated actions, the vSI plays a crucial role in coordinating motor control of a set of structures that are functionally related: the vSI serves as an interface not only between orofacial structures and the external environment but also between the orofacial structures themselves. In this article, we will chiefly review the neuroanatomical and neurophysiological studies on the monkey vSI from the viewpoint of motor control or stereognostic ability. Future physiological studies that analyze the spatiotemporal spiking pattern of vSI neurons during various behaviors in monkeys should reveal the principles of information coding and might significantly benefit future applications of brain-machine-brain interface (BMBI) technology.

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Gustatory coding in the precentral extension of area 3 in Japanese macaque monkeys; comparison with area G

Cited by 18 publications

References 30 publications

Spike Rate and Spike Timing Contributions to Coding Taste Quality Information in Rat Periphery

Spike Rate and Spike Timing Contributions to Coding Taste Quality Information in Rat Periphery

Identification of human gustatory cortex by activation likelihood estimation

The Ventral Primary Somatosensory Cortex of the Primate Brain: Innate Neural Interface for Dexterous Orofacial Motor Control

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