The Edinburgh dissector, or, System of practical anatomy : for the use of students in the dissecting room / by a Fellow of the College of Surgeons of Edinburgh.

Date:
1837
Catalogue details

Licence: Public Domain Mark

Credit: The Edinburgh dissector, or, System of practical anatomy : for the use of students in the dissecting room / by a Fellow of the College of Surgeons of Edinburgh. Source: Wellcome Collection.

Provider: This material has been provided by the Woodruff Health Sciences Center Library at Emory University, through the Medical Heritage Library. The original may be consulted at the Woodruff Health Sciences Center Library, Emory University.

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    I 12 THE EDINBURGH DrsSTECTOR. ed by a l^j-ger bony arch, which also gives attachment to ligaments above and below, and which is tubercular behind for the insertion of the posterior small recti muscles of the head. This arch is rounded and thick behind, but anteriorly, where it joins with the rest of the vertebra, it is depressed and marked above with grooves for the vertebral arteries a]^dsuboccipital nerves, and below for the second pair of cervical nerves. The atlas has moreover a large vertebral foramen, divided by aligament into two portions; of which the posterior alone contributes to the formation of the spinal canal. Two irregular tubercles, on the inside of the upper articular processes give attachment to this ligament. The notches are here situated behind the articular processes, which are nearly horizontal and very broad. The superior, which is concave, oval, and inclined inwards, is articu- lated with the occipital bone ; the inferior, which is nearly plain, is also inclined inwards, and is connected with the second vertebra. transverse processes Zixe very long, terminate in a more or less obtuse point, and rise by a double root, of which the anterior branch is more slender, the posterior longer and thicker. The hole in their base is larger than in the other cervical vertebrae. 20. The Second Vertebra or Axis is also peculiar. It has a nearly triangular circumference. The body is much higher than broad, and is marked anteriorly with a central ridge and two hollows for the longi colli muscles. From its upper part rises a long, rounded, vertical projection, named the odontoid or tooth-like process, which is articulated before with the anterior arch of the atlas, and is marked behind with a small convex surface for sliding on the transverse ligament. The spinous process is very large, and is marked below with a broad and deep channel. The upper notches are placed much farther back than the lorver. The superior articular processes are nearly horizontal, inclined a little outwards, and convex : they are broader than the inferior, which are turned forwards and downwards. The transverse processes are short, and are neither bi furcated nor channelled ; they seem to arise from the superior articular processes, and their base is perforated by a short canal, for the vertebral artery, which haa