Manual of diseases and deformities of the spine / by R.L. Swan.

  • Swan, Robert Lafayette, 1843-1916.
Date:
1894
Catalogue details

Licence: Public Domain Mark

Credit: Manual of diseases and deformities of the spine / by R.L. Swan. Source: Wellcome Collection.

Provider: This material has been provided by University of Bristol Library. The original may be consulted at University of Bristol Library.

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    [ ] CHAPTER XIX. EMBRYONIC RUDIMENTS IN THE SACRAL AND COCCYGEAL REGION. Congenital Sacral Dimple—Coccygeal Glabella—Vortex Coccygeus— Congenital Coccygeal Fistula. In connection with this subject reference may be made to certain rudiments of embryonic forms in the coccygeus region. The congenital sacral dimple or foveola coccygea. The coccygeal glabella, the vortex coccygeus, and the congenital coccygeal fistula have given rise to much speculation as to their true nature. The sacral dimple has been alluded to by Luschka and Hyrtl, who named it Forameti ccecuvt recto- anahy Lawson Tait, Nature, Augt. 22nd, 1878, p. 481, gave statistics of its existence in adult women^ which show that in 23 per cent, it is distinct; in 22 per cent, indistinct, and in 55 per cent, absent. In the work of Professor Ecker is given a compendious account of the nature of the formation of this depres- sion :— A convergent hair vortex termed by him 'Vortex coccygeus' is present in the foetus at the fourth or fifth month in the coccygeal region. Above this hair vortex, is a bald, hairless spot, which Ecker