Banca de DEFESA: RENATA MEDEIROS DO NASCIMENTO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : RENATA MEDEIROS DO NASCIMENTO
DATE: 28/02/2024
TIME: 14:00
LOCAL: on-line
TITLE:

Comparative morphology of the brachial plexuses of golden lion tamarin (Leontopithecus rosalia, Linnaeus 1766), golden-faced lion tamarin (Leontopithecus chrysomelas, Kuhl 1820) and black lion tamarin (Leontopithecus chrysopygus, Mikan 1823)

KEY WORDS:

Callitrichids, forelimb, innervation

PAGES: 67
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Zoologia Aplicada
SUMMARY:

The morphology of the brachial plexuses is closely related not only to the movement of the thoracic limbs but also to the locomotion of living beings that have them. Its comparative study provides information that allows us to understand how individuals of different species can interact within their group or with the environment in which they live (natural or captive). The objective of this research was to describe and compare the origins and antimeric distributions of brachial plexus nerves in three groups of lion tamarin species of the genus Leontopithecus. Thirty-two male lion tamarin specimens of the genus Leontopithecus (11 L. rosalia, 10 L. chrysomelas and 11 L. chrysopygus) were used, coming from the Non-Human Primate Breeding Service of the Primatology Center with different death histories and transferred to the Teaching and Research Laboratory in Morphology of Domestic and Wild Animals (LEPMADS) of the Department of Animal and Human Anatomy of the Federal Rural University of Rio de Janeiro. Specimens were fixed with perfusion of 10% formaldehyde solution. The information found was represented through absolute frequencies and simple percentages. The ventral rami are composed of three nerve trunks and two fascicles: cranial, middle and caudal trunks; dorsal and ventral fascicles. The right and left brachial plexuses were derived from the ventral spinal branches C5 to T1 with different frequencies in their arrangements in the three groups studied. These arrangements had distinct contributions to the formation of the resulting nerves between species. Among them, those that supply the extrinsic muscles (subclavian, cranial pectoral, caudal pectoral, thoracodorsal, long thoracic and lateral thoracic), the intrinsic muscles (suprascapular, subscapular, axillary, musculocutaneous, median, radial and ulnar) and cutaneous muscles through the nerves medial cutaneous layer of the arm and medial cutaneous layer of the forearm. The data presented in this study allow us to contribute information regarding the evolutionary biology and conservation of primates, which are a group of great importance for the biodiversity of different ecosystems, in addition to being experimental models for public health research.

COMMITTEE MEMBERS:
Externo à Instituição - ALCIDES PISSINATTI - CPRJ
Externo à Instituição - CARLOS AUGUSTO DOS SANTOS SOUSA - UFVJM
Externo ao Programa - 1281417 - LUCIANO DA SILVA ALONSO - nullInterno - 2181722 - MARCELO ABIDU FIGUEIREDO
Externo à Instituição - ROGÉRIO MAGNO DO VALE BARROSO - UFLA
Externo à Instituição - YURI KARACCAS DE CARVALHO - UFF