Volume 1

Hand atlas of human anatomy / by Werner Spalteholz ; edited and translated from the fourth German edition by Lewellys F. Barker.

  • Spalteholz, Werner, 1861-1940.
Date:
[1906?]
Catalogue details

Licence: Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

Credit: Hand atlas of human anatomy / by Werner Spalteholz ; edited and translated from the fourth German edition by Lewellys F. Barker. Source: Wellcome Collection.

    13/250 (page 3)
    3. Occipital bone, os occipitale, viewed from the right side. (The direction does not correspond to that of the hone when the skull is in its ordinary position.) The squama occipitalis (see also Figs. 1, 2, 55, 56 and 59—66) is curved so as to be convex backward in the sagittal and transverse direction. Its anterior border forms the posterior periphery of the foramen occipitale magnum; the free lateral and superior borders meet in the median plane, the lower portion of each lateral border being slightly serrated as the continuation of the mar go mastoideus (p. 2); the upper portion of this border is deeply and multiply serrated and is known as the mar go Lambdoideus, for union with the occipital margin of the parietal hone (sutura lambdoidea). Projecting from the middle of the posterior surface is seen the external occipital protuberance (protuberantia occipitalis externa). Extend- ing lateralward from this protuberance on each side are the superior nuchal lines (lineae nuchae superiores), convex upward, and above these the less constant supreme nuchal hues (lineae nuchae supremae). In the median plane, extending toward the foramen magnum, is seen the external occipital crest (crista occipitalis externa) which gives attachment to the ligamentum nuchae. From about the middle of the crest extend lateralward the two inferior nuchal lines (lineae nuchae inferiores), also convex upward. The area for the m. occipitalis above the external protuberance and the supreme nuchal lines is called the occipital plain (planum occipitale), while that below the same is designated the nuchal plain (planum nuchale) and gives attachment to the mm. trapezius, sternocleidomastoideus, splenius capitis, semispinalis capitis, ohliquus capitis superior, recti capitis posteriores. On the anterior surface of the bone at the middle point of the eminentia cruciata, nearly corresponding in position to the external protuberance, is seen the internal occipital protuberance or protuber antia occipitalis interna (for the confluens sinuum; falx cerebri, and tentorium cerehelli). From the internal protuberance arise three well marked grooves: one in the median line passes upward, the sulcus sagittalis (0. T. superior longitudinal sulcus) for the sinus sagittalis superior and the falx cerebri: and one lateralward on each side, the s'lilcus transversus (for the sinus transversus; tentorium cerebelli). Of the two transverse sulci the right is usually wider than the left and it alone is continuous with the sulcus sagittalis. A fourth groove or (more often) ridge extends to the foramen magnum and receives the sinus occipitalis. The anterior surface presents variably marked juga cerebralia and cerebellaria and impressiones digitatae. 1*