rheumatology-congress-physiology-2019-scientifictracks

Page 21

December 9-10, 2019 | Barcelona, Spain

Volume 14

ARTHRITIS AND RHEUMATOLOGY

ANATOMY AND PHYSIOLOGY

International Conference on

Journal of Orthopaedics Trauma Surgery

and Related Research

Rheumatology Congress 2019 & Anatomy and Physiology 2019

December 09-10, 2019

J Orthop Trauma Surg Rel Res, ISSN: 1897-2276

Morphology and distribution of the thoracic spinal nerves in the African giant rat

(Cricetomys gambianus)

Sunday Maidawa

Ahmadu Bello University, Nigeria

his study was carried out to provide detailed description of the morphology of the thoracic spinal nerves and their distribution

to the skeletal muscles of the AGR. Six (6) adult rats of both sexes where euthanized using halothane inhalant anesthetic by

the application of the open – drop method. The rats were fixed in 10% formalin and skin and muscles were dissected and the

vertebral column was opened by laminectomy and removal of osseous pedicle enclosing the spinal cord using a bone cutter and

rongeur. The AGR has 12 thoracic spinal nerves. The dorsal primary branches of the thoracic spinal nerves divided into medial

and lateral branches. The medial branches supplied branches to the thoracic erector spinae muscles while the lateral branches

supplied several layers of muscles on the dorsolateral aspect of the thorax and reached the skin subcutaneously as the lateral

cutaneous nerves. The ventral primary branches of the thoracic (intercostal) nerves passed distally along the caudal border of

the ribs covered medially by pleura. Each intercostal nerve detached muscular branches and a cutaneous branch which supplied

branches to the muscles of the lateral thoracic wall. The lateral branch detached about the middle of the lateral thoracic wall

divided into the middle muscular branch and the lateral cutaneous branches. The former supplied fibers to the thoracic part of

the abdominal muscles and the latter supplied the superficial fascia on the ventrolateral aspect of the thorax and the cutaneous

trunci. The cranial series of intercostal nerves at their distal ends supplied fibers to the transvesus and rectus thoracis. The distal

ends of the caudal series formed a trunk that terminated in the cranial part of the rectus abdominis. The thoracic spinal nerves are

distributed to the muscles of the trunk of the AGR.

Biography

S M Maidawa is lecturer of Veterinary Anatomy at the Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria. He has

taught Anatomy since 2005 and is actively involved in research.