Relations Of Diseases Of The Eye To General Diseases; Forming A Supplementary Volume To Every…

Paperback | January 11, 2012

byMax Knies

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This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1895. Not illustrated. Excerpt: ... E. Individual Diseases of the Brain, Cord, and Nerves. After this detailed introductioii we may be comparatively brief in our remarks on the implication of the organ of vision in the individual diseases of the nervous system. In many of them the eye symptoms are extremely important and characteristic, and determine the diagnosis and treatment. As we shall see, they often throw light on the interpretation of the whole disease. 1. Diseases Of The Brain. Ancvmia and Hypercemia of the Brain and its Membranes. In these two conditions it is to be supposed that the status of the vessels of the retina and the entrance of the optic nerve (which derive their blood supply from the same source as a large part of the brain) would furnish a picture of the vascular condition of the brain, especially of the cortex and the pia mater. This expectation, however, is far from being realized. In the first place, the amount of blood in the brain does not depend solely on the internal carotid (from which the ophthalmic artery takes its origin) but from the entire supply to the circle of Willis. For example, changes in the amount of blood in the carotid may appear only in the retina, where the)- give rise to hyperaemia or anosmia, while the amount of blood in the brain remains unchanged. In many cases, however, the amount of blood in the pia mater and in the retina is similar. The slight degrees of change are demonstrable with difficulty or not at all, because the calibre of the vessels varies normally within very wide limits. Hence it is difficult to recognize slight hyperaemia or anaemia of the retina or papilla unless by comparison with the healthy eye. As a rule this is impossible in diffuse affections of the brain. It may even happen that the retina exhibits the opposite condition ...

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This historic book may have numerous typos, missing text or index. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. 1895. Not illustrated. Excerpt: ... E. Individual Diseases of the Brain, Cord, and Nerves. After this detailed introductioii we may be comparatively brief in our remarks...

Format:PaperbackDimensions:172 pages, 9.69 × 7.44 × 0.37 inPublished:January 11, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217543820

ISBN - 13:9780217543828

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