The dissector's manual of practical and surgical anatomy / By Erasmus Wilson.

  • Wilson, Erasmus, Sir, 1809-1884.
Date:
1856
Catalogue details

Licence: Public Domain Mark

Credit: The dissector's manual of practical and surgical anatomy / By Erasmus Wilson. Source: Wellcome Collection.

Provider: This material has been provided by the Harvey Cushing/John Hay Whitney Medical Library at Yale University, through the Medical Heritage Library. The original may be consulted at the Harvey Cushing/John Hay Whitney Medical Library at Yale University.

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    arteries and first cervical nerves. It is in relation, posteriorly, with the recti ])Ostici niinores and obliqui superiores. The lateral ligaments are strong fasciculi of ligamentous fibres, attached, below, to the base of the transverse process of the atlas at each side, and, above, to the transverse process of the occipital bone. With a ligamentous expansion derived from the vaginal process of the temporal bone, these ligaments form a strong sheath around the vessels and nerves which pass through the carotid and jugular foramina. The capsular ligaments are the thin and loose ligamentous capsules, which surround the synovial membranes of the articula- tions between the condyles of the occipital bone and the superior articular processes of the atlas. The ligamentous fibres are most numerous upon the anterior and external part of the articulation. The movements taking place between the cranium and atlas, are those of flexion and extension, giving rise to the forward nodding of the head. When this motion is increased to any extent, the whole of the cervical region .concurs in its production. Articulation of the Axis with the Occipital Bone.—The liga- ments of this articulation are three in number— Occipito-axoid, Two odontoid. The occipito-axoid ligament (apparatus ligamentosus colli) is a broad band, which covers in the odontoid process and its liga- ments. It is attached, below, to the body of the axis, where it is continuous with the posterior common ligament; superiorly, it is inserted by a broad expansion, into the basilar groove of the occipital bone. It is firmly connected, opposite the body of the axis, with the dura mater; and sometimes is described as consisting of a central and two lateral portions; this, however, is an unnecessary refinement. The odontoid ligaments (alar) are two short and thick fasciculi of fibres, which pass outwards from the apex of the odontoid process, to the sides of the occipital foramen and condyles. A third and smaller fasciculus (ligamentumsuspensorium) proceeds from the apex of the odontoid process to the anterior margin of the foramen magnum. These ligaments serve to limit the extent to which rotation of the head may be carriecT, hence they are termed check ligaments. 4. Articulation of the Atlas ivith the Axis.—The ligaments of this articulation arej^i^e in number— Anterior atlo-axoid. Two capsular. Posterior atlo-axoid. Transverse. The anterior ligament consists of ligamentous fibres, which pass from the anterior tubercle and arch of the atlas to the base of the odontoid process and body of the axis, where they