The anatomy of the human body / [William Cheselden].

William Cheselden

Date:: 1732

Credit: The anatomy of the human body / [William Cheselden]. Source: Wellcome Collection.

39/454 page 19

$_help'to keep the’ braifi fteady, (fée chapter of the Dura’Mater) and ‘aré admirable fuppérts to the thin and flat parts of the fetill; ‘which elfe’ would be exceeding weak. (For what rémains ‘of this bone, fee chap. Of the organs of heating.) Be TWEEN the Jatt defertbed bones, and ‘the following bone, are two large holes, which are the eighth Foramina. © Through thefe holes pafs Tab. iv. the Par Vagum and Lateral Byuuted' ; fometimes + there are two on each fide, one for the nerve, and one for the Sinus. “I’o thefe we may add an- other very fmall one on each fide, through which pafs the Portiones Dura of the auditory nerves; and fometimes there is another for an artery. Os Occipitt s, makes all the back-part OF Tab, iv.2. the fcull; it is bounded by the fphenoidal, tem: poral, petrofal, and parietal bones; it has two 7 {mall Apophyfes, by which it is articulated to the Tab. viii. fpine; near thofe Apophyfes are two {mall Fora- 9 mina, which are the ninth of the fcull; through Tab. viii. thefe pafs the ninth pair of nerves; and between 9 thefe is the great, or tenth Foramen, through which the Medulla Oblongata defcends into the Tab. iv. {pine, the cervical arteries enter, andthe cervical 3: !5: veins and tenth pair of nerves pafs out. In the infide of this bone is a crucial {pine imprefied by the longitudinal and lateral Sinufes; and on the outfide oppofite to the middle of this fpine, in 7 _fome bodies, is an Apophyfis, and from that Tap, viii, down to the great Foramen, a fmall thin fpine. 7- The fpines in this bone are of the fame ufe with thofe in the Os.Frontis, &c. viz. to ftrengthen it, which they do here in a greater degree than C 2 in$

The anatomy of the human body / [William Cheselden].

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