title: [Anatomomicroscopic study of the transition of the sigmoid sinus--1st portion of the internal jugular vein in the monkey Cebus apella Linnaeus, 1758. Comparative study].
abstract: The author verified that the transition between the sigmoid sinus and first portion of the internal jugular vein in the tufted capuchin monkey (Cebus apella) begins at the level of the terminal segment of the sigmoid sinus, extends by the wall of the initial portion of the mentioned vessel, which is in the posterior compartment of the jugular foramen, up to the inferior third of the first portion of the internal jugular vein. Was observed in Cebus apella, like in man, that the superior two thirds of the first portion of the internal jugular vein have fibro-elastic structure, as well as the fibrous-muscular nature of the inferior third of this vessel. The tunica intima is almost essentially elastic. Collagenic and elastic fibers which originate from the bony border of the jugular foramen incorporate to venous wall after describing a stretch in spiral around the vascular lumen. This arrangement constitute important elements for the dilatation, lengthening, shortening and even of reinforced of the walls of the internal jugular vein during the movements of the head. Comparatively, however, these vascular segments are disposed in transversal and frontal planes.
mesh_terms: D000818:Animals; D002427:Cebidae / Q000033:anatomy & histology*; D002428:Cebus / Q000033:anatomy & histology*; D003094:Collagen; D003392:Cranial Sinuses / Q000033:anatomy & histology*; D004547:Elastic Tissue; D006801:Humans; D007601:Jugular Veins / Q000033:anatomy & histology*; D009131:Muscle, Smooth, Vascular; D013045:Species Specificity
chemical_list: D003094:Collagen
vernacular_title: Etude anatomo-microscopique de la transition du sinus sigmoideus--première portion de la veine jugulaire interne sur le singe, Cebus apella Linnaeus, 1758. Etude comparée à ceux de l'homme.