Banca de QUALIFICAÇÃO: JESSICA DA COSTA DA SILVA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : JESSICA DA COSTA DA SILVA
DATE: 21/02/2025
TIME: 14:00
LOCAL: Mini auditório do ISPA
TITLE:

Morphology of the Central Nervous System and Anatomical Description of the Brachial and Lumbosacral Plexus of Kinosternon scorpioides scorpioides (Linnaeus, 1766)

KEY WORDS:

brain; intumescence; spinal cord; muçuã; neuroanatomy.

PAGES: 45
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUMMARY:

Kinosternon scorpoioides scorpioides belongs to the Order of Testudines and is a small semi-aquatic turtle, popularly known as muçuã in the state of Pará and jurará in the state of Maranhão. To generate information on the morphology of this species, we sought to describe the morphological aspects of the central nervous system and the anatomy of the brachial and lumbosacral plexus of K. s. scorpioides. Ten specimens were used, all of which had their skulls opened and the brain exposed. In addition to having the carapace dissected to analyze the spinal cord, in two specimens the carapace was dissected more extensively to identify the nerves that innervate the carapace. Microscopic evaluation of the brain and fragments of the spinal cord will be carried out on three representatives. The specimens also had their brachial and lumbosacral plexuses dissected, along with their pelvic and thoracic limbs. All the specimens showed the same results. The brain of K. s. scorpioides was lysencephalic, and its components include the olfactory bulb, cerebral hemispheres, cerebellum, bulb, pons and infundibulum. The spinal cord is located inside the vertebral canal and was cylindrical in shape and whitish in color. It does not have a uniform caliber, since it has two dilations, called intumescences, one in the cervico-thoracic region and the other in the thoracic-sacral region, and it is from these that the branches that give rise to the brachial and lumbosacral plexus respectively are formed. The presence of nerves running from the medulla to innervate the carapace region was also observed. The brachial plexus had the participation of C7, C8 and T1 in its formation and T9, T10, S1, S2 and S3 contributed to the formation of the lumbosacral plexus. Three trunks emerged from the brachial plexus, called the cranial, middle and caudal trunks, from which the nerves that run along the thoracic muscles originate. On the other hand, the lumbosacral plexus had a lumbar and a sacral portion, but the two portions were connected via S1. The lumbar portion generated nerves that innervated the most cranial region of the pelvic limb. Two branches were formed from the sacral region, one ventral and the other dorsal, and from these branches arose the nerves responsible for innervating the medial and caudal regions of the pelvic limb of K. s. scorpioides.  We hope that the results of this study will contribute to expanding knowledge about the species in question, helping in clinical, anesthetic and surgical procedures involving K. s. scorpioides. In addition to generating information that can contribute to anatomical studies involving comparative anatomy between the species in question and other Testudines.

COMMITTEE MEMBERS:
Presidente - 1733442 - ANA RITA DE LIMA
Interna - 1661748 - ERIKA RENATA BRANCO
Externa ao Programa - 1160202 - ALANNA DO SOCORRO LIMA DA SILVA - UFRAExterna ao Programa - 3494995 - ANDREA MAGALHAES BEZERRA - UFRAExterno ao Programa - 1111612 - JOSÉ LEDAMIR SINDEAUX NETO - UFRAExterna à Instituição - ELLEN YASMIN EGUCHI MESQUITA - Unama