Banca de DEFESA: RAFAEL ALEXANDRE QUEIROZ

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : RAFAEL ALEXANDRE QUEIROZ
DATE: 29/08/2024
TIME: 14:00
LOCAL: Videoconferência, https://meet.google.com/xeh-nnqa-wge
TITLE:

IMMEDIATE POST-MORTEM EVALUATION OF THE CARPO-RADIAL EXTENSOR REFLEX IN GOATS AND SHEEP BEFORE AND AFTER RADIAL NERVE SECTION

KEY WORDS:

Neurology; small ruminants; spinal reflex; neurectomy; muscles.

PAGES: 81
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUBÁREA: Clínica e Cirurgia Animal
SUMMARY:

Considering the involvement of goats and sheep in neurological diseases that can affect the cervico-thoracic spinal intumescence and the components of the brachial plexus, there arises a need for neurological evaluation of these small ruminants, with precision in the information obtained from this examination. This research aimed to verify the reliability of the carpo-radial extensor reflex for diagnosing neurological alterations in these two species. For this purpose, 30 sheep and 30 goats, over five months old, with standard body and muscle conformation for these species, without abnormalities in gait, were selected, and the carpo-radial extensor reflex was tested in both thoracic limbs. The reflexes were evaluated with the aid of a neurological percussion hammer, initially before slaughter, immediately post-slaughter relaxation, and after radial nerve section. The results were documented by species after three consecutive evaluations in each limb. The responses were evaluated quantitatively and qualitatively and classified as 0 (absence of response), 1 (diminished response), 2 (normal response), and 3 (increased response). The reflex intensity data showed abnormal distribution and were evaluated in pairs using the non-parametric Wilcoxon test. There was a significant difference in responses between the in vivo phase compared to the immediate post-mortem and post-neurotomy phases, which progressively decreased but without areflexia, except in one sheep. As already proven in dogs and cats, there was a carpal extension response in 100% of goats and 96.66% of sheep, even after cardiac arrest with complete disappearance of the flexor reflex (withdrawal reflex), and even after radial nerve section, indicating that in these two species, they are not spinal myotatic reflexes related to a reflex arc. As occurs in humans, dogs, and cats, the results thus characterized it as an idiomuscular response, making the carpo-radial extensor reflex unreliable for neurological evaluation of small ruminants..

COMMITTEE MEMBERS:
Presidente - JOAQUIM EVENCIO NETO
Interno - EDUARDO ALBERTO TUDURY
Interno - FABRICIO BEZERRA DE SA
Externo à Instituição - ALEXANDRE TADEU MOTA MACEDO - UNIVASF
Externo à Instituição - BRUNO MARTINS ARAUJO - UFPI