Morphology of sympathetic chain in Saguinus niger

Abstract

Saguinus niger popularly known as Sauim, is a Brazilian North primate. Sympathetic chain investigation would support traumatic and/or cancer diagnosis which are little described in wild animals. The aim of this study was to describe the morphology and distribution of sympathetic chain in order to supply knowledge for neurocomparative research. Three female young animals that came death by natural causes were investigated. Animals were fixed in formaldehyde 10% and dissected along the sympathetic chain in neck, thorax and abdomen. Cranial cervical ganglion was located at the level of carotid bifurcation, related to carotid internal artery. In neck basis the vagosympathetic trunk divides into the sympathetic trunk and the parasympathetic vagal nerve. Sympathetic trunk ran in dorsal position and originated the stellate ganglia, formed by the fusion of caudal cervical and first thoracic ganglia. Vagal trunk laid ventrally to heart and formed the cardiac plexus. In abdomen, on the right side, were found the celiac ganglion and cranial mesenteric ganglion; in the left side these ganglia were fusioned into the celiac-mesenteric ganglion displaced closely to the celiac artery. In both sides, the caudal mesenteric ganglion was located near to the caudal mesenteric artery.

The Macro and Micro-Structure of the Celiac and Cranial Mesenteric Ganglia in a Long-Lived Rodent - Paca (Cuniculus paca, Linnaeus 1766)

“…Two predominant patterns were seen in pacas: celiac and cranial mesenteric ganglion and the celiacomesenteric ganglion, as observed in cats and in rabbits (Ribeiro et al, 2000b;Sasahara et al). The paca celiac ganglion presented elongated shape as observed in Sauim (Saguinus niger), a neotropical primate (Pinto et al, 2013).In humans, several shapes were observed as laminar, nodular and sickle. In cats the shape also varies between rectangular, elliptic, irregular and piriformis and in rats the format is pear shape (Hamer & Santer, 1981;Ribeiro et al, 2000b).…”

Morphological examination of the domestic cat’s cervicothoracic ganglion in ontogenesis

“…at the cervical vertebrae level or between the seventh and eighth cervical vertebrae. Pinto et al (17) conducted a study on tamarins, which are classified as primates, and found the cervicothoracic ganglion under the second rib. The shape of the ganglion depends on the species.…”