Projections from the superior colliculus to the trigeminal system and facial nucleus in the rat

The Journal of Comparative Neurology
Céline DauvergneG Pinganaud

Abstract

To determine the influence of the superior colliculus (SC) in orienting behaviors, we examined SC projections to the sensory trigeminal complex, the juxtatrigeminal region, and the facial motor nucleus in rats. Anterograde tracer experiments in the SC demonstrated predominantly contralateral colliculotrigeminal projections. Microinjections in the deep layers of the lateral portion showed labeled nerve fibers and terminals in the ventromedial parts of the caudal principal nucleus and of the rostral oral subnucleus and in the medial part of the interpolar subnucleus. Some terminals were also observed in the juxtatrigeminal region and in the dorsolateral part of the facial motor nucleus contralaterally, overlying the orbicularis oculi motoneuronal region. Verification by retrograde tracer injections into the trigeminal target regions showed labeled SC neurons mostly in lateral portions of layers 4-7. When the juxtatrigeminal region was involved, a remarkable increase of labeled neurons was observed, having a patch-like arrangement with a decreasing gradient from lateral to medial SC portions. Retrograde tracer injections in the dorsolateral VII nucleus showed bilateral labeled neurons mainly in the deep lateral SC portion. Retrogr...Continue Reading

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Citations

May 3, 2005·Neuroscience Letters·Albertine Ellen SmitFrans VanderWerf
Oct 14, 2011·Journal of Neurophysiology·Wendy A FriedmanAsaf Keller
Nov 19, 2013·Neuroscience and Biobehavioral Reviews·Luigi Cattaneo, Giovanni Pavesi
Jun 27, 2007·Proceedings of the National Academy of Sciences of the United States of America·Rocío Leal-CampanarioAgnès Gruart
Mar 23, 2011·Journal of Bodywork and Movement Therapies·Antonino Marco Cuccia
May 6, 2008·American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics·Antonino Marco Cuccia, Carola Caradonna
Apr 11, 2008·Neuroscience Research·Céline DauvergneFrans Vanderwerf
Jul 31, 2013·The European Journal of Neuroscience·Carlo VeronesiGianfranco Franchi
Sep 16, 2006·Neuroscience Research·Albertine Ellen SmitFawzia Zerari-Mailly
Nov 7, 2009·Cranio : the Journal of Craniomandibular Practice·Brendan Stack, Anthony Sims
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May 1, 2020·Pain Research & Management : the Journal of the Canadian Pain Society = Journal De La Société Canadienne Pour Le Traitement De La Douleur·Annalisa MonacoDavide Pietropaoli
Dec 5, 2018·Acta neurochirurgica·Tao HuangHong-Yang Zhao
Sep 19, 2014·The Journal of Experimental Biology·Lucie A Huet, Mitra J Z Hartmann

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