Same same but different. Different trigeminal chemoreceptors share the same central pathway

PloS One
Kathrin KollndorferVeronika Schöpf

Abstract

Intranasal trigeminal sensations are important in everyday life of human beings, as they play a governing role in protecting the airways from harm. Trigeminal sensations arise from the binding of a ligand to various sub-types of transient receptor potential (TRP) channels located on mucosal branches of the trigeminal nerve. Which underlying neural networks are involved in the processing of various trigeminal inputs is still unknown. To target this unresolved question fourteen healthy human subjects were investigated by completing three functional magnetic resonance imaging (fMRI) scanning sessions during which three trigeminal substances, activating varying sub-types of chemoreceptors and evoking different sensations in the nose were presented: CO2, menthol and cinnamaldehyde. We identified similar functional networks responding to all stimuli: an olfactory network, a somatosensory network and an integrative network. The processing pathway of all three stimulants was represented by the same functional networks, although CO2 evokes painful but virtually odorless sensations, and the two other stimulants, menthol and cinnamaldehyde are perceived as mostly non painful with a clear olfactory percept. Therefore, our results suggest a...Continue Reading

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Citations

Sep 30, 2015·Neuroscience·K KollndorferV Schöpf
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Nov 7, 2017·Cerebral Cortex·Alexandra Adam-DarquePetra S Hüppi
Dec 24, 2020·Brain Structure & Function·Franziska S MüschenichJessica Freiherr

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Software Mentioned

Group ICA for fMRI Toolbox ( GIFT
SPM
AAL
ICASSO
GIFT
MATLAB
SPM8

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