caa a22 4500 475774752 CHVBK 20180406123628.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1007/s004180050443 doi (NATIONALLICENCE)springer-10.1007/s004180050443 Ultrastructural analysis of spinal primary afferent fibers within the circular muscle of the cat lower esophageal sphincter [Elektronische Daten] [C. Mazzia, N. Clerc] Abstract : We have analyzed the ultrastructural characteristics and environment of spinal primary afferent fibers that run within the circular muscle of the cat lower esophageal sphincter. These were selectively labeled by anterogradely transported cholera toxin B subunit conjugated with horseradish peroxidase. Most of the labeled fibers were perpendicular to the muscle cells but some ran sinuously or parallel to the muscle cells. All the labeled fibers were unmyelinated and exhibited relatively rare varicosities. Most of the fibers were in large nerve fiber bundles surrounded by perineurium and probably project to the mucosa. Only some fibers that were in small nerve fiber bundles with no perineurium ran parallel to the musculature and established close relationships with smooth muscle cells. They might be a small subpopulation of the spinal tension receptors, most of the other spinal tension receptors being located in the myenteric plexus area, between the circular and longitudinal muscle. Springer-Verlag Berlin Heidelberg, 2000 Mazzia C. Laboratoire de Neurobiologie, C.N.R.S., 31 Chemin J. Aiguier, 13402 Marseille, France e-mail: clerc@lnb.cnrs-mrs.fr Tel.: +33-4-91164313, Fax: +33-4-91164301, FR aut Clerc N. Laboratoire de Neurobiologie, C.N.R.S., 31 Chemin J. Aiguier, 13402 Marseille, France e-mail: clerc@lnb.cnrs-mrs.fr Tel.: +33-4-91164313, Fax: +33-4-91164301, FR aut https://doi.org/10.1007/s004180050443 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004180050443 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mazzia C. Laboratoire de Neurobiologie, C.N.R.S., 31 Chemin J. Aiguier, 13402 Marseille, France e-mail: clerc@lnb.cnrs-mrs.fr Tel.: +33-4-91164313, Fax: +33-4-91164301, FR aut NATIONALLICENCE 700 1- Clerc N. Laboratoire de Neurobiologie, C.N.R.S., 31 Chemin J. Aiguier, 13402 Marseille, France e-mail: clerc@lnb.cnrs-mrs.fr Tel.: +33-4-91164313, Fax: +33-4-91164301, FR aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer