Trigeminal activation using chemical, electrical, and mechanical stimuli

Tactile, proprioceptive, and nociceptive information, including also chemosensory functions are expressed in the trigeminal nerve sensory response. To study differences in the processing of different stimulus qualities, we performed a study based on functional magnetic resonance imaging. The first t...

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Veröffentlicht in:Pain (Amsterdam) 2008-10, Vol.139 (2), p.376-388
Hauptverfasser: Iannilli, E., Del Gratta, C., Gerber, J.C., Romani, G.L., Hummel, T.
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container_end_page 388
container_issue 2
container_start_page 376
container_title Pain (Amsterdam)
container_volume 139
creator Iannilli, E.
Del Gratta, C.
Gerber, J.C.
Romani, G.L.
Hummel, T.
description Tactile, proprioceptive, and nociceptive information, including also chemosensory functions are expressed in the trigeminal nerve sensory response. To study differences in the processing of different stimulus qualities, we performed a study based on functional magnetic resonance imaging. The first trigeminal branch (ophthalmic nerve) was activated by (a) intranasal chemical stimulation with gaseous CO 2 which produces stinging and burning sensations, but is virtually odorless, (b) painful, but not nociceptive specific cutaneous electrical stimulation, and (c) cutaneous mechanical stimulation using air puffs. Eighteen healthy subjects participated (eight men, 10 women, mean age 31 years). Painful stimuli produced patterns of activation similar to what has been reported for other noxious stimuli, namely activation in the primary and secondary somatosensory cortices, anterior cingulate cortex, insular cortex, and thalamus. In addition, analyses indicated intensity-related activation in the prefrontal cortex which was specifically involved in the evaluation of stimulus intensity. Importantly, the results also indicated similarities between activation patterns after intranasal chemosensory trigeminal stimulation and patterns usually found following intranasal odorous stimulation, indicating the intimate connection between these two systems in the processing of sensory information.
doi_str_mv 10.1016/j.pain.2008.05.007
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Gustatory system and gustation</subject><subject>Pain</subject><subject>Physical Stimulation - methods</subject><subject>Smell - physiology</subject><subject>Somatosensory Cortex - physiology</subject><subject>Somesthesis and somesthetic pathways (proprioception, exteroception, nociception); interoception; electrolocation. 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source MEDLINE; Journals@Ovid Ovid Autoload
subjects Adult
Biological and medical sciences
Chemosensory
Electric Stimulation - methods
Evoked Potentials, Somatosensory - physiology
Female
fMRI
Fundamental and applied biological sciences. Psychology
Humans
Magnetic Resonance Imaging
Male
Olfaction
Olfactory system and olfaction. Gustatory system and gustation
Pain
Physical Stimulation - methods
Smell - physiology
Somatosensory Cortex - physiology
Somesthesis and somesthetic pathways (proprioception, exteroception, nociception)
interoception
electrolocation. Sensory receptors
Trigeminal
Trigeminal Nerve - physiology
Vertebrates: nervous system and sense organs
title Trigeminal activation using chemical, electrical, and mechanical stimuli
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