. Quain's Elements of anatomy. ortions which spring, one on eachside, from the posterior surface of the body, and meet in the median plane anterior i)art of each half, thick and narrow, is called the petficte,- the jiosteriorpart is broad and fiat, and is called the lamina. The concavities on the ui)per andlower borders of the pedicles are named rerleljral nolrlies (fig. 2, B), and (;onsti-tute, by the apposition of tliose of contiguous vertebrae, the inlrrrcrletrral foramina,a series of rounded apertures, which communicate with the vertebral canal, andtransmit the spinal nerves and
. Quain's Elements of anatomy. ortions which spring, one on eachside, from the posterior surface of the body, and meet in the median plane anterior i)art of each half, thick and narrow, is called the petficte,- the jiosteriorpart is broad and fiat, and is called the lamina. The concavities on the ui)per andlower borders of the pedicles are named rerleljral nolrlies (fig. 2, B), and (;onsti-tute, by the apposition of tliose of contiguous vertebrae, the inlrrrcrletrral foramina,a series of rounded apertures, which communicate with the vertebral canal, andtransmit the spinal nerves and blood-vessels. Jhe spinous process (neural spine) projects backwards IVoiii the :ir(;li in themedian plane. The transverse processes, placed one on each side, i»iv)jcct outwardsfrom the arch at the junction of the ))edicle with the lamina. The articular pro-cesses (zygapophyses), two superior and two inferior, project upwards and downwardsopposite the attachment of the transverse processes ; their articular surfiices, coated. Fix. L -Tenth dorsal vertebra, from )) D. (jiinn.) (Drawn 6 THE VERTEBRAL COLUMN. with cartilage, in the superior jmir look backwards, and in the inferior forwards, sothat the former face the latter in adjoining yertebrge. The foramen is bounded anteriorly by the body, posteriorly and laterally by thoarch. The series of riiigs thus formed, united by ligaments, constitutes the spinalor neural canal, which lodges the spinal cord. Texture.—The bodies of the vertebras are almost entirely composed of spongy substance,the principal lamella being vertical ; on the surface is a thin layer of compact canals, commencing at the larger foramina behind, traverse the cancellated arch and processes contain a much smaller proportion of spongy substance, being coveredwith compact tissue of considerable density in some places. GROUPS OF VERTEBRiE. The vertebrse are divided into five groups, named from the regions which theyoccupy, cerv
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectanatomy
