Electrical neuroimaging reveals intensity-dependent activation of human cortical gustatory and somatosensory areas by electric taste.
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| Názov: | Electrical neuroimaging reveals intensity-dependent activation of human cortical gustatory and somatosensory areas by electric taste. |
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| Autori: | Ohla, Kathrin, Toepel, Ulrike, le Coutre, Johannes, Hudry, Julie |
| Rok vydania: | 2025 |
| Zbierka: | Université de Lausanne (UNIL): Serval - Serveur académique lausannois |
| Predmety: | Adult, Afferent Pathways/physiology, Biophysical Phenomena/physiology, Brain Mapping, Electric Stimulation/methods, Electroencephalography/methods, Evoked Potentials, Somatosensory/physiology, Female, Humans, Male, Reaction Time/physiology, Signal Processing, Computer-Assisted, Somatosensory Cortex/physiology, Taste/physiology, Taste Perception/physiology, Tongue/physiology, Young Adult |
| Popis: | To analyze the neural basis of electric taste we performed electrical neuroimaging analyses of event-related potentials (ERPs) recorded while participants received electrical pulses to the tongue. Pulses were presented at individual taste threshold to excite gustatory fibers selectively without concomitant excitation of trigeminal fibers and at high intensity evoking a prickling and, thus, activating trigeminal fibers. Sour, salty and metallic tastes were reported at both intensities while clear prickling was reported at high intensity only. ERPs exhibited augmented amplitudes and shorter latencies for high intensity. First activations of gustatory areas (bilateral anterior insula, medial orbitofrontal cortex) were observed at 70-80ms. Common somatosensory regions were more strongly, but not exclusively, activated at high intensity. Our data provide a comprehensive view on the dynamics of cortical processing of the gustatory and trigeminal portions of electric taste and suggest that gustatory and trigeminal afferents project to overlapping cortical areas. |
| Druh dokumentu: | article in journal/newspaper |
| Jazyk: | English |
| ISBN: | 978-0-00-287896-8 0-00-287896-8 |
| ISSN: | 1873-6246 |
| Relation: | Biological Psychology; https://iris.unil.ch/handle/iris/104670; serval:BIB_30003A526D60; 000287896800013 |
| DOI: | 10.1016/j.biopsycho.2010.09.007 |
| Dostupnosť: | https://iris.unil.ch/handle/iris/104670 https://doi.org/10.1016/j.biopsycho.2010.09.007 |
| Prístupové číslo: | edsbas.C7889B72 |
| Databáza: | BASE |
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Nájsť tento článok vo Web of Science | Abstrakt: | To analyze the neural basis of electric taste we performed electrical neuroimaging analyses of event-related potentials (ERPs) recorded while participants received electrical pulses to the tongue. Pulses were presented at individual taste threshold to excite gustatory fibers selectively without concomitant excitation of trigeminal fibers and at high intensity evoking a prickling and, thus, activating trigeminal fibers. Sour, salty and metallic tastes were reported at both intensities while clear prickling was reported at high intensity only. ERPs exhibited augmented amplitudes and shorter latencies for high intensity. First activations of gustatory areas (bilateral anterior insula, medial orbitofrontal cortex) were observed at 70-80ms. Common somatosensory regions were more strongly, but not exclusively, activated at high intensity. Our data provide a comprehensive view on the dynamics of cortical processing of the gustatory and trigeminal portions of electric taste and suggest that gustatory and trigeminal afferents project to overlapping cortical areas. |
|---|---|
| ISBN: | 9780002878968 0002878968 |
| ISSN: | 18736246 |
| DOI: | 10.1016/j.biopsycho.2010.09.007 |