The projections to the medulla of neurons innervating the carotid sinus in the dog

Brain Research Bulletin
P Ruiz-PesiniM Yllera

Abstract

The localization and brain stem projections of neurons innervating the carotid sinus of the dog were studied by horseradish peroxidase histochemistry following microinjection of wheat germ agglutinin-horseradish peroxidase (WGA-HRP) under the adventitia of the carotid sinus. Within the brain stem, labeled afferent fibers and presumptive terminals were found bilaterally in the caudal nucleus tractus solitarius (nTS), the area postrema (AP), and the lateral tegmental field (LTF), reaching the area of the nucleus ambiguus (nA). Sparse labeling was also seen in the ipsilateral spinal trigeminal nucleus (SpV) and lateral cuneatus nucleus (LCn). These findings suggest the existence of multiple pathways by which peripheral baroreceptor inputs may influence central cardiovascular-related neurons. In addition to classically defined relay in the nTS, carotid sinus afferents may also interact more directly with these neurons in other brain stem regions.

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Citations

Jan 8, 1999·Brain Research·W W BlessingE Nalivaiko
Mar 10, 2000·Brain Research Bulletin·J L SeagardF A Hopp
Mar 11, 2006·Fiziologiia cheloveka·V A Safonov, N N Tarasova
Feb 3, 2016·Brain Research·John Ciriello, Monica M Caverson
May 12, 2004·Peptides·Cinda J Helke, Jeanne L Seagard
Jan 11, 2003·American Journal of Physiology. Heart and Circulatory Physiology·David J RademacherJeanne L Seagard
Jun 1, 1997·Journal of Neurophysiology·A EbersbergerH O Handwerker
Jul 19, 2001·Annals of the New York Academy of Sciences·J L SeagardF A Hopp

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