Brachial Plexus and Point of Anesthetic Block in Choloepus didactylus
neuroanatomy; real sloth; Xenarthra; morphology
The urbanization process contributes to the reduction of the natural environment of wild animals. Making accidents involving these animals more frequente. What generates an increased demand for care and surgical and anesthetic interventions. Given this scenario, animals such as the real sloth (Choloepus didactylus) need further studies involving the area of neuroanatomy. The study will address the macroscopic description of the brachial plexus in this species with the identification of points for anesthetic block. So far, three Choloepus didactylus cadavers were formalinized and had their thoracic limbs dissected until the brachial plexus was exposed. The real sloth's brachial plexus was derived from spinal nerves C4 to T2, and in one of them there was no participation of T2. These branches gave rise to three trunks: the cranial trunk, which generally originated between segments C4, C5 and C6; the middle trunk formed from the C7 segment and the caudal trunk emerged from C8, T1 and T2, in most specimens. The three trunks joined and gave rise to the common trunk which in turn gave rise to the main nerves of the brachial plexus.