Origins and branchings of the brachial plexus of the gray brocket deer Mazama gouazoubira (Artiodactyla: Cervidae)
2013
Lucélia Gonçalves Vieira | Priscilla Rosa Queiroz Ribeiro | Mariana Oliveira Lima | Rogério Rodrigues de Souza | Sady Alexis Chavauty Valdes | André Luiz Quagliatto Santos
The brachial plexus is a set of nerves originated in the cervicothoracic medular region which innervates the thoracic limb and its surroundings. Its study in different species is important not only as a source of morphological knowledge, but also because it facilitates the diagnosis of neuromuscular disorders resulting from various pathologies. This study aimed to describe the origins and branchings of the brachial plexus of Mazama gouazoubira. Three specimens were used, belonging to the scientific collection of the Laboratory for Teaching and Research on Wild Animals of Universidade Federal de Uberlandia (UFU); they were fixed in 3.7% formaldehyde and dissected. In M. gouazoubira, the brachial plexus resulted from connections between the branches of the three last cervical spinal nerves, C6, C7, C8, and the first thoracic one, T1, and it had as derivations the nerves suprascapular, cranial and caudal subscapular, axillary, musculocutaneous, median, ulnar, radial, pectoral, thoracodorsal, long thoracic and lateral thoracic. The muscles innervated by the brachial plexus nerves were the supraspinatus, infraspinatus, subscapularis, teres major, teres minor, deltoid, cleidobrachial, coracobrachialis, biceps brachialis, brachial, triceps brachialis, anconeus, flexor digitorum superficialis, flexor digitorum profundus, flexor carpi radialis, flexor carpi ulnaris, extensor carpi radialis, lateral ulnar, extensor carpi obliquus, extensor digitorum, superficial pectoral, deep pectoral, ventral serratus, and external oblique abdominal.
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