Optic nerve atrophy from toxic agents / by G. E. de Schweinitz.

  • George Edmund de Schweinitz
Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: Optic nerve atrophy from toxic agents / by G. E. de Schweinitz. 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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    Following Groenouw\ the papillo-maoular bundle may be described as consisting of those fibers in the optic nerve which supply the retina between the macula lutea and the papilla, and which lie in the temporal portion of the nerve tip, in a wedge-shaped segment. The apex of this triangular portion is directed toward the vessels and occupies about one- third of the surface of the papilla. As it pursues its way through the orbital portion, it gradually approaches the axis of the nerve, which it reaches in the optic canal. At the foot of the chiasm it occu- pies its upper and inner portion, but in the tractus it sinks to the central portion and remains there until it arrives at the brain. According to Sachs^, the papillo-macular bundle in the papilla is a triangle with its apex at the vessels, and the base toward the supero-temporal quadrant. Ooing backward, the bundle becomes elongated and assumes a crescentic form as it nears the optic canal. It would not be profitable at present to discuss the 'differences of opinion as to the disposition of these fibers in the optic nerve trunk, in the region of the vessel-entrance, and their division in the chiasm. For their full consideration the reader is referred to the examinations of Samelsohn,'^ Vossius,* Nettleship and Edmunds,^ Uhthoff,'^ Bunge,^ Sachs^ and Stolt- zing.^ Upon this papillo-macular tract the baleful influence of certain toxic agents falls, and there result an aug- mentation of nuclei, a hypertrophy of the connective tissue and a wasting of the nerve fibers, the process being most intense, according to Sachs, in one small 1 Graefe's Archiv, 1892, xxxvlii, Abth. I, pp. 1-70. 2 Archives of Ophthalmology, 1889, xviii, No, 2. pp. 133-162. a Graefe's Archiv, 1882, xxviii, Abth. I, pp. 1-110 i Graefe's Archiv, 1882, xxviii, Abth. Ill, p. 201. 5 Trans, of Ophth. Soc. of the U. K. 1881,1, p. 124. 6 Graefe's Archiv, 1886, xxxii, Abth. IV, 95-108, and Ibid, xxxiii, Abth. 1, pp. 257-318. ^ Ueber die Gesichtsfeld und Faserverlauf im optischen Leistung's Apparat, Halle, i884. 8 Archives of Ophthalmology, 1889, xviii. No. 2, pp. 138-162, and Ibid, 1894. xxiii, No. 4, pp. 426-444. 9 Klinische und Anatomische Beitriigezur Intoxikations Amblyopic. Inaug. Dissert., Marburg, 1893.
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