AUTHOR: DAIANE RODRIGUES DE SOUZA TERRA
TITLE: Alouatta belzebul SPINAL CORD TOPOGRAPHY (TOPOGRAFIA DA MEDULA ESPINAL DE Alouatta belzebul)
ADVISOR: Prof. Dr. Kleber Fernando Pereira
DEFENSE DATE: 09/21/2018
The genus Alouatta comprises species popularly known as guariba or howler monkey, has wide geographical distribution and can be found in several biomes. Aimed to describe the anatomy of the spinal cord, focusing on the topography of the medullary cone of Alouatta Beelzebul specimens, highlighting the cervical and lumbar swellings and the equine tail, in order to provide knowledge of the anatomy, and compare with other species to assist in anesthetic and surgical procedures. Four animals, which died, received from the project of rescue and scientific use of the fauna of the Belo Monte-Pará Hydroelectric Power Plant, and were fixed in 10% aqueous formaldehyde solution. The structures such as spinal cord, cervical and lumbar swelling, and equine tail were documented by camera. After thawing, the height of the specimens was measured to have a proportion of the size of these animals and a size of 80 to 82 cm from head to toe was observed. After removal of the skin and musculature, it was observed that the spine of all howler monkeys showed division into 7 cervical, 13 thoracic, 5 lumbar and 3 fused sacral vertebrae. After removal of the vertebral arches for spinal cord exposure, it was found that the spinal cord is 22 cm long for all animals, presenting cervical swelling between the C3 and C6 vertebrae, with an average of 2.2 cm and swelling. lumbar spine between the T11 and T12 vertebrae, with an average of 1.65 cm. The medullary cone lies between the T12 and L1 vertebrae, with an average of 1.5 cm, and the equine tail between L1 and S3, with an average of 15 cm. The availability of this study plays an important role, serving as a basis for the practice of epidural anesthesia.