Innervation of the arteriovenous anastomoses in the dog tongue |
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Authors: | Dr T Iijima T Kondo K Nishijima T Tanaka |
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Institution: | (1) Department of Oral Anatomy, Faculty of Dentistry, Kyushu University, Fukuoka, Japan;(2) Department of Oral Anatomy, Faculty of Dentistry, Kyushu University 61, 812 Fukuoka, Japan |
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Abstract: | Summary Profiles of nerve plexuses in the arteriovenous anastomoses of the dog tongue were investigated by both transmission and scanning electron microscopy. Three-dimensional morphology of the vascular nerves was examined after removal of the connective tissue components by the HCl-hydrolysis method. Tight bending and a rich nerve supply were the most characteristic features of the anastomosing channels. The tunica media consisted of an outer circular layer of typical smooth-muscle cells and an inner region containing longitudinal plicae of ramified smoothmuscle cells. The tunica adventitia was exclusively occupied by nerve bundles; fibroblasts were poorly developed. Numerous nerve bundles of variable size were coiled around the anastomosing channels, and occasional bundles ran crosswise over the U-shaped bent vessels. |
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Keywords: | Arteriovenous anastomoses Vascular innervation Tongue Transmission electron microscopy Scanning electron microscopy Dog |
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