A manual of anatomy . ortionarises from the vertebral arch and represents the true transverseprocess; the ventral portion represents the ribs of the thoracic region. 26 OSTEOLOGY These are united by a small bar of bone that completes the foramenand each division terminates in a small tubercle called tuberculaanterius et posterius. These processes are grooved for the accommoda-tion of the spinal nerve trunks. The vertebral artery and vein passthrough the transverse foramina of the superior six cervical verte-bra. The roots of the vertebral arches arise from the middle of theside (dorsal portion
A manual of anatomy . ortionarises from the vertebral arch and represents the true transverseprocess; the ventral portion represents the ribs of the thoracic region. 26 OSTEOLOGY These are united by a small bar of bone that completes the foramenand each division terminates in a small tubercle called tuberculaanterius et posterius. These processes are grooved for the accommoda-tion of the spinal nerve trunks. The vertebral artery and vein passthrough the transverse foramina of the superior six cervical verte-bra. The roots of the vertebral arches arise from the middle of theside (dorsal portion) of the body and are directed dorsally and later-ally, in a horizontal direction. Above and below these are theintervertebral notches. The lamince are rather long and broad;they fuse in the midline dorsally. The spinous processes are short,bifid, flattened from above downward and are dorsally articular processes are dorsal to the transverse processes. The Spinous process Superior articularfacet (process). Groove for _spinal nerve Foramen transversarium Body Fig. 6.—The fifth cervical vertebra seen from above. (Sobolta and McMurrich.) facets are circular and the superior face upward and dorsally, whilethe inferior face downward and ventrally. The Atlas.—This is the first cervical vertebra and it possessesneither body nor spinous process. It consists of two lateral masses con-nected to each other by a ventral and a dorsal arch. Each lateral massis irregular and its ventral end is closer to the midline than the dorsalend. Superiorly it possesses an oval articular facet {fovea articularis. superior) that receives a condyle of the occipital bone. Each facet isconcave and slopes dorsally and toward the midline. The inferiorarticular facets {fovea articulares inferiores) are circular and nearlyflat. Each surface faces downward and toward the midline. Uponthe medial surface of each lateral mass there is a small tubercle towhich the transverse ligament of the atlas is
Size: 1742px × 1434px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
