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Specific activation of the paralemniscal pathway during nociception.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Frangeul, Laura Porrero, Cesar Garcia-Amado, Maria Maimone, Benedetta Maniglier, Madlyne Clascá, Francisco Jabaudon, Denis
Description	Country affiliation: Switzerland Author Affiliation: Frangeul L ( Department of Basic Neurosciences, University of Geneva, 1 rue Michel Servet, 1211, Geneva, Switzerland.)
Abstract	Two main neuronal pathways connect facial whiskers to the somatosensory cortex in rodents: (i) the lemniscal pathway, which originates in the brainstem principal trigeminal nucleus and is relayed in the ventroposterior thalamic nucleus and (ii) the paralemniscal pathway, originating in the spinal trigeminal nucleus and relayed in the posterior thalamic nucleus. While lemniscal neurons are readily activated by whisker contacts, the contribution of paralemniscal neurons to perception is less clear. Here, we functionally investigated these pathways by manipulating input from the whisker pad in freely moving mice. We report that while lemniscal neurons readily respond to neonatal infraorbital nerve sectioning or whisker contacts in vivo, paralemniscal neurons do not detectably respond to these environmental changes. However, the paralemniscal pathway is specifically activated upon noxious stimulation of the whisker pad. These findings reveal a nociceptive function for paralemniscal neurons in vivo that may critically inform context-specific behaviour during environmental exploration.
File Format	HTM / HTML
ISSN	0953816X
Issue Number	9
Volume Number	39
e-ISSN	14609568
Journal	European Journal of Neuroscience
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2014-05-01
Publisher Place	France
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Neuroscience Nociception Physiology Trigeminal Nucleus, Spinal Metabolism Animals Mice Mice, Inbred C57bl Proto-oncogene Proteins C-fos Vibrissae Innervation Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Neuroscience

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