Origem e distribuição do nervo axilar em fetos de suínos (Sus scrofa domesticus - Linnaeus, 1758) do cruzamento das linhagens Dan Bred e AGPIC337

Abstract

Was investigated the origin and distribution of the axillary nerve in 30 swine fetuses from the crossing lines of Dan Bred and AGPIC337, 15 males and 15 females, after the fixation of the material in an aqueous solution of formaldehyde in 10%. The axillary nerve originated from c6 and c7 ventral branches in 22 examples (73,33%), 10 females (33,3%) and 12 males (40,00%), and from c5, c6 and c7 in the remaining 8 examples (26,66%), five females (16,66%) and three males (10,00%). Concerning the distribution, the axillary nerve sent branches for the muscles teres minor (100%), deltoid (100%) and the cleidobrachialis part of the brachiocephalic muscle (100%). In all cases this nerve sent a branch for the fascia and the skin of cranial region from arm and forearm. That branch is the cranial cutaneous branch from the forearm. No significant differences were found both for the origin and for the distribution of the axillary nerve in relation to the gender and antimere of the animals.