Banca de DEFESA: KAREN DOS SANTOS TOLEDO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : KAREN DOS SANTOS TOLEDO
DATE: 28/05/2021
TIME: 14:00
LOCAL: on-line
TITLE:

Morphological variation of the brachial plexus in phyllostomid bats (Chiroptera, Phyllostomidae)

KEY WORDS:

Wings. Muscles. Nerves. Peripherical Nervous System. Neotropical Chiropterans

PAGES: 56
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Zoologia Aplicada
SUMMARY:

Despite the remarkable morphological modifications that occurred in the
thoracic limbs of bats, information about the brachial plexus in this group is still scarce.
This study aimed to describe the origin, composition, and distribution of these
peripherical nerves in four species of Phyllostomidae. Both antimers of six Artibeus
lituratus, five Desmodus rotundus, seven Glossophaga soricina, and five Phyllostomus
hastatus—all males, adults, and from the Adriano Lúcio Peracchi Collection (UFRRJ)—
were dissected. After complete exposure of the structure, I found that the brachial plexus
of D. rotundus and P. hastatus are formed by the same roots (C5 – T1), while the fourth
cervical spinal nerve and the second thoracic spinal nerve are present in G. soricina (C4
– T1) and A. lituratus (C5 – T2), respectively. There was intraspecific variation e
asymmetry both in the origin of the structure and in the combinations of the nerve
segments for forming the terminal branches. Still, the distribution to the target muscles
and patagium was more conserved. Data presented here support the presence of two
distribution patterns of the nerves to the muscles in Chiroptera, and the innervation of the
membranes seems to be explained by embryogenesis. Although the phyllostomid bats
brachial plexus is similar to that of other terrestrial Laurasiatheria, aspects identified in
these bats and apparently unique to Chiroptera, may be related to anatomical changes in
the thoracic limbs functionally liked to flight.

BANKING MEMBERS:
Externa à Instituição - ÉRIKA RENATA BRANCO - UFRA
Externa à Instituição - NATHÁLIA SIQUEIRA VERÍSSIMO LOUZADA - UFRJ
Externa à Instituição - DANIELA DIAS - FIOCRUZ
Externa ao Programa - 1331598 - ADRIANA VENTURA
Interno - 012.990.857-68 - ADRIANO LUCIO PERACCHI - UFRRJ