Origin of the Roots of the Accessory Nerve in the Goitred Gazelle and Tuj Sheep

Abstract

The accessory nerve in mammals is unique in possessing two origins: it comprises a spinal origin, radix spinales, from the medulla apinalis and a cranial origin, radix cranialis, formed by several rootlets from the medulla oblongata of the brain stem. However, some studies have reported that a few animals, such as camel, giraffe and lama, lack the spinal origin (Lesbre, 1903; Kanan, 1969; Cui-Sheng and Xie, 1998). Several textbooks (Miller, 1964; Sisson and Grossman, 1964; Dursun, 2000) and literature reports amply document the gross origin and course of the accessory nerve only in domestic animals such as equines (Tecirlioğlu, 1983), ruminants (Pospieszny, 1984) and canines (Holomanova et al., 1972, 1984; Richmond et al., 1999), along with some other laboratory animals including rabbits (Kitamura et al., 1989). Recent gross structural studies, on the other hand, have focused particularly on a variety of wild species other than domestic ones. Studying and revealing the gross anatomy of such species and comparing it with that of domestic ones is interesting and a valuable contribution to veterinary gross anatomy. This study focused on revealing in particular the origin and also the course, branches and distribution of the nerve fibres of the accessory nerve in the goitred gazelle, Gazella subgutturosa, an arthiodactyle possessing anatomical structures to similar to those of domestic small ruminants in many ways (Demirsoy, 1992). Additionally, the findings were compared with those in Tuj sheep, a local breed called ‘kars’ and ‘Çıldır’ sheep in Turkey, and ‘Tuchin’ in the south of Russia and the Caucasus (Akcapınar, 2000).

DOI: 10.1007/s11259-006-3368-3

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Cite this paper

@article{Aslan2006OriginOT, title={Origin of the Roots of the Accessory Nerve in the Goitred Gazelle and Tuj Sheep}, author={Kağan Aslan and I. K{\"{u}rt{\"{u} and E. U. Bozkurt and Sebahattin {\"{O}zcan}, journal={Veterinary Research Communications}, year={2006}, volume={30}, pages={839-843} }