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.

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    Crista galli L.al>yrintlins ethmoiclalis i Labyrinthiis etlimoidalis Processus alaris Lamina cribrosa Lamina perpendiciilaris Lamina cribrosa I Processus uncinatus I Concha nasalis superior Concha nasalis media ' '-Foramen ethmoidale posterius Laruina papyracea Foramen ethmoidale anterius Crista galli Processus alaris Lamina perpendicularis 21 and 22. Ethmoid bone, os ethmoidale. From beliind, somewliat scliematic. From above. The os ethmoidale (ethmoid hone) (see also Figs. 23—25, 63, 64, 68—70, 73—75) is unpaired, helps in part to close the most anterior portion of the cerebral skull below, but reaches with its main mass deep down into the facial skull and helps to form the nose and orbit. It consists above of a transversely placed oblong plate, the lamina cribrosa; from the under surface of this extending downward in the median plane is the lamina perpendicularis and from each of its two lateral borders hangs the lahyrinihus ethmoidalis. The lamina cribrosa (cribriform plate) (see also Figs. 23, 63—66 and 72—75) lies horizontally, fills the incisura ethmoidalis oss. frontalis completely and thus forms &t the anterior and the two lateral margins a part of the sutura frontoethmoidalis; the posterior margin lies on the anterior border of the upper surface of the body of the sphenoid bone (sutura sphenoethmoidalis). The cribriform plate presents on its upper surface in the median plane a ridge which becomes elevated in front to form the oblong crista galli or cock’s comb (for the falx cerebri); this is higher in front than behind and often contains bone-marrow spaces; it is attached to the pars nasalis and crista frontalis oss. frontalis, usually by means of the two small, laterally directed processus alares, and completes the entrance to the foramen caecum oss. frontalis when this is incomplete. The cribriform plate is perforated by numerous foramina of different sizes, the larger of which are arranged often in two rows, one medial and one lateral, and which are continued in small grooves on the lamina perpendicularis and on the medial surface of the labyrinth; they give passage to the nn. olfactorii. A small slit lateralward from the anterior part of the crista galli gives passage to the a. and the n. ethmoidalis anterior.