A manual of anatomy . iform and the ventrodorsal dimension is abouthalf the transverse dimension. The superior and inferior surfacesare smooth and somewhat concave and rimmed. The ventral and 30 OSTEOLOGY lateral surfaces axe. quite concave from above downward and shownumerous foramina. The dorsal surface is concave from side to sideas well as from above downward. The body is sUghtly thickerbehind than in front giving a curve to this part of the column, withthe convexity forward. The roots of the vertebral arches are directeddorsally and are short and thick. Both intervertebral notches arewell
A manual of anatomy . iform and the ventrodorsal dimension is abouthalf the transverse dimension. The superior and inferior surfacesare smooth and somewhat concave and rimmed. The ventral and 30 OSTEOLOGY lateral surfaces axe. quite concave from above downward and shownumerous foramina. The dorsal surface is concave from side to sideas well as from above downward. The body is sUghtly thickerbehind than in front giving a curve to this part of the column, withthe convexity forward. The roots of the vertebral arches are directeddorsally and are short and thick. Both intervertebral notches arewell marked. The laminae are broad and nearly vertical. Thevertebral foramen is large and triangular. The spinous process isshort, flat and broad; each is directed dorsally and slightly down-ward. The transverse processes are somewhat slender and are directedlaterally and horizontally. In the successive vertebrae the laminae Spinous process Mammilfory processAccessory r _ , ^^^^ ??^ ^^^ -j^M Superior articular process. Transverse process Fig. 10.—The third lumbar vertebra seen from above. (Sobotla and McMurrich.) arise at a more ventral level from the roots of the vertebral apparently represent the costal elements of the thoracic ver-tebra. Upon the dorsal surface of each transverse process are theaccessory tubercles. The superior articular processes are oval and lieat the junction of the roots of the arches and the lamina. Thearticular facets are concave, vertical and face medially. The inferiorarticular processes are at the inferior margin of each lamina at theroot of the spinous process. The oval and nearly flat facets facelaterally. These processes are nearer the median plane than arethe superior ones and so are overlapped by these when fifth lumbar vertebra has the largest body. Its ventralvertical dimension is much greater than the dorsal vertical measure-ment and so assists the sacrum in forming the sacrovertebral transverse processes
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecthumananatomy, bookyea
