Ophthalmic Neuro-Myology - A Study Of The Normal And Abnormal Actions Of The Ocular Muscles From The Brain Side Of The Question (1905) (Paperback)

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: 1 --4left inferior rectus.p Otherwise there would be diplopia. Correct this error -fty-ither exercise or operations, then these two basal centers would lapse into their normal state of rest. The result?restful state of both muscles and brain centers?would be represented by Plate VII. Plate XXVI. represents the upward version of the same pair of eyes. The first conjugate center sends an equal amount of neuricity to both superior recti, but with unequal results. The tonicity of the left superior rectus being greater than that of the right superior rectus, the right eye would not rotate as fast as the left unless supplemental neuricity should be sent by the right first basal center to the weak right superior rectus. In upward version the seventh conjugate center is active to prevent inward torsion- ing of the eyes. The abnormal work done by both brain and muscle in the upward rotation is shown by contrasting Plate XXVI. with Plate XI, the latter showing the upward rotation of orthophoric eyes. This abnormality consists of activity of the right first basal center and the excessive contraction of the right superior rectus. If the first and seventh cortical centers cause no symptoms in the upward rotation of orfhophoric eyes, these centers, doing precisely the same work in superverting hyperphoric and cataphoric eyes, as shown in Plate XXVI., can cause no symptoms. The discomfort, therefore, must come from excitation of the right first basal center and the resulting excessive con- ' ' 1J. FLAZEZXYZI traction of the right superior rectus. Giving equal tonic- ity to the superior and inferior recti by either exercise or operations, allows the right first basal center to remain inactive in the upward rotation, hence there could be no symptoms. Plate XXVII. represents the d...

General

Imprint:	Kessinger Publishing Co
Country of origin:	United States
Release date:	December 2009
First published:	December 2009
Authors:	Giles Christopher Savage
Dimensions:	229 x 152 x 12mm (L x W x T)
Format:	Paperback - Trade
Pages:	234
ISBN-13:	978-1-120-75032-7
Categories:	Books > Language & Literature > Literature: texts > Collections & anthologies of various literary forms Promotions > Women In Power > Books
LSN:	1-120-75032-6
Barcode:	9781120750327

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