The temporal change in the cortical activations due to salty and sweet tastes in humans: FMRI and time-intensity sensory evaluation

Yuko Nakamura, Tazuko K. Goto, Kenji Tokumori, Takashi Yoshiura, Koji Kobayashi, Yasuhiko Nakamura, Hiroshi Honda, Yuzo Ninomiya, Kazunori Yoshiura

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11 Citations (Scopus)

Abstract

It remains unclear how the cerebral cortex of humans perceives taste temporally, and whether or not such objective data about the brain show a correlation with the current widely used conventional methods of taste-intensity sensory evaluation. The aim of this study was to investigate the difference in the time-intensity profile between salty and sweet tastes in the human brain. The time-intensity profiles of functional MRI (fMRI) data of the human taste cortex were analyzed using finite impulse response analysis for a direct interpretation in terms of the peristimulus time signal. Also, time-intensity sensory evaluations for tastes were performed under the same condition as fMRI to confirm the reliability of the temporal profile in the fMRI data. The time-intensity profile for the brain activations due to a salty taste changed more rapidly than those due to a sweet taste in the human brain cortex and was also similar to the time-intensity sensory evaluation, confirming the reliability of the temporal profile of the fMRI data. In conclusion, the time-intensity profile using finite impulse response analysis for fMRI data showed that there was a temporal difference in the neural responses between salty and sweet tastes over a given period of time. This indicates that there might be taste-specific temporal profiles of activations in the human brain.

Original languageEnglish
Pages (from-to)400-404
Number of pages5
JournalNeuroReport
Volume23
Issue number6
DOIs
Publication statusPublished - Apr 18 2012

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

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    Nakamura, Y., Goto, T. K., Tokumori, K., Yoshiura, T., Kobayashi, K., Nakamura, Y., Honda, H., Ninomiya, Y., & Yoshiura, K. (2012). The temporal change in the cortical activations due to salty and sweet tastes in humans: FMRI and time-intensity sensory evaluation. NeuroReport, 23(6), 400-404. https://doi.org/10.1097/WNR.0b013e32835271b7