Year: 2018 | Month: February | Volume 8 | Issue 1
Gross Anatomical and Sex wise Biometrical Studies on the Atlas and Axis of Blue bull (Boselaphus tragocamelus)
Abstract:
The present study was carried out on the atlas and axis of six specimens of adult Blue bull (Boselaphus tragocamelus) of either sex. Both the atlas and axis were atypical cervical vertebrae. The atlas presented a large rough tuberosity on its dorsal arch, thick ventral arch and less curved wings those were thick and more horizontal plate bones. They terminated into a rough curved ridge laterally and exceeded behind the articular surface caudally. The cranial articular cavities for the occipital condyles were partially divided into dorsal and ventral parts by a non-articular area and were separated by a narrow interval below. The caudal articular surfaces were flattened behind and were continued to the vertebral canal forming an extensive area known as fovea dentis for articulation with the dens of the axis. There were presences of cranio-internal intervertebral foramen and cranio-external alar foramen connected by a short furrow. A deep atlantal fossa was present in the ventral aspect of wing of atlas. The axis was the longest cervical vertebra that presented a spout like odontoid process projected from the body cranially and an intervertebral foramen at the base of the transverse process. The supraspinous process was blade like cranially that increased in height and thickness backwards and terminated abruptly beyond the level of caudal articular surface of the body. The infraspinous process was in the form of a median ridge. The Biometrical observations on different parameters of atlas and axis reflected significance (P<0.05) differences between the sexes of this species.
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