The anatomy of the muscles, ligaments, and fasciae of the orbit : including an account of the capsule of tenon, the check ligaments of the recti, and of the suspensory ligament of the eye / by C. B. Lockwood.

  • Lockwood, C. B.
Date:
[1885]
Catalogue details

Licence: Public Domain Mark

Credit: The anatomy of the muscles, ligaments, and fasciae of the orbit : including an account of the capsule of tenon, the check ligaments of the recti, and of the suspensory ligament of the eye / by C. B. Lockwood. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    t*(LIBRARV)^J ANATOMY OF THE MUSCLES, EKVb-- -^^P serve to confirm, in a great measure, what they have f^^d. In addition, frozen sections of the orbit have been freely used. It seems quite unnecessary to dwell upon the advantages of this method. It greatly facilitates a very difficult dissection, and enables everything to be seen in its proper relation. The preparations were made in the manner described by Dr Garson. Entire heads were frozen and the orbits removed from them intact by appropriate saw-cuts. Vertical and horizontal sections were afterwards made, the parts being of course still firmly frozen. Any additional steps required to display the various structures wUl be indicated when they are treated in detail. The Capmle of Tenon and Insertions of the Ocvlar Miiscles.— The insertions of the ocular muscles are so Intimately related to the aponeurosis which surrounds the sclerotic that it will be best to consider these insertions and the aponeurosis together. In studying the capsule of Tenon it is convenient to examine its exterior first. When the orbit is dissected in the customary manner, the membrane may be distinguished by its yellowish colour and closely matted appearance. When the levator palpe- brte has been divided, the structure in question is quite easily separated from the orbital fat. When this has been done, three parts will be found to demand attention :—(1) A central part which surrounds the globe; (2) the prolongations which this sends along the muscles of the eye ; and (3) its connections with the walls of the orbit i (Plate I. fig. 3). Exterior of the Centred Portion of the Capsule of Tenon.— Assuming that the orbit has not been treated with alcohol or any hardening solution, the central part of the capsule of Tenon may easily be seized and dragged from the sclerotic, From this it might be inferred that it is merely a loose and thin covering; but as only the upper and back portion can be approached in this way such a conclusion is hardly warranted. When vertical and horizontal sections are viewed, much more comprehensive ideas may be formed (Plate I. figs. 3 and 4). It is then perceived to be a fibrous capsule ^ which surrounds the globe from the ciliary mnrgin of the cornea backwards to the entrance of the optic nerve; its anterior third is intimately related to the back of the ocular conjunctiva; its middle third sends prolongations to the muscles of the eye; its posterior third is in contact with and ' VvU Sappey, p. lO.v. = Its streiigtli and fif)pRarancc were accurately indicated by Fcrrall wlicii lie called it the tunica vngiiialiH oculi.