• Main Authors: MARINA P.E. PINTO, ÉRIKA BRANCO, EMERSON T. FIORETTO, LUIZA C. PEREIRA, ANA R. LIMA
• Format: Article
• Language: English
• Published: Academia Brasileira de Ciências 2013-05-01
• Series: Anais da Academia Brasileira de Ciências
• Subjects: anatomia; primata; Saguinus niger; cadeia simpática; anatomy; primate; sympathetic chain
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000100365

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.<br>O Saguinus niger popularmente conhecido como Sauim, &#233; um primata do Norte do Brasil. A investiga&#231;&#227;o da cadeia simp&#225;tica pode dar suporte a diagn&#243;sticos traum&#225;ticos e/ou de c&#226;ncer que s&#227;o pouco descritos em animais selvagens. O objetivo deste estudo foi descrever a morfologia e a distribui&#231;&#227;o da cadeia simp&#225;tica para suprir conhecimentos em pesquisas neurocomparativas. Foram investigadas tr&#234;s f&#234;meas jovens que vieram a &#243;bito por causas naturais. Os animais foram fixados em formalde&#237;do 10% e dissecados ao longo da cadeia simp&#225;tica no pesco&#231;o, t&#243;rax e abd&#244;men. O g&#226;nglio cervical cranial foi localizado ao n&#237;vel da bifurca&#231;&#227;o carot&#237;dea, relacionado &#224; art&#233;ria car&#243;tida interna. Na base do pesco&#231;o o tronco vago simp&#225;tico se divide em tronco simp&#225;tico e nervo vago parassimp&#225;tico. O tronco simp&#225;tico corre na posi&#231;&#227;o dorsal e originou os g&#226;nglios estrelados, formados pela fus&#227;o dos g&#226;nglios cervicais caudais e do primeiro g&#226;nglio tor&#225;cico. O tronco vagal passa ventralmente ao cora&#231;&#227;o e forma o plexo card&#237;aco. No abd&#244;men, no lado direito encontrouse o g&#226;nglio cel&#237;aco e o mesent&#233;rico cranial, no lado esquerdo estes g&#226;nglios estavam fusionados no g&#226;nglio cel&#237;aco-mesent&#233;rico disposto pr&#243;ximo &#224; art&#233;ria cel&#237;aca. Em ambos os lados, o g&#226;nglio mesent&#233;rico caudal estava localizado pr&#243;ximo &#224; art&#233;ria mesent&#233;rica caudal.