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Studies on Intraocular Effects of the Orbital Parasympathetic Pathway: III. Effect on Steady-State Dynamics

Studies on Intraocular Effects of the Orbital Parasympathetic Pathway: III. Effect on... Abstract The effects of electrical stimulation of the orbital parasympathetic pathway in the cat on the chamber angle and meshwork and on the intraocular pressure,1,2 as reported previously, pointed towards a possible associated increase in the facility of outflow of aqueous. This possibility was specifically investigated in 105 experiments in the anesthetized cat, as well as in the enucleated eye. The results, which will be the subject of this communication, revealed that during parasympathetic stimulation there was a marked increase in the facility of outflow which was due entirely to the activity of the ciliary muscle rather than to the associated constriction of the pupil. Techniques This presentation will be limited to the details of the constant-pressure perfusion and the constant-rate perfusion techniques, because they provide a measurement of the outflow facility which is independent of the elasticity constant of the eyeball and of elasticity changes that might accompany Parasympathetic References 1. Armaly, M. F.: Studies on Intraocular Effects of the Orbital Parasympathetic Pathway: I. Technique and Effects on Morphology , A. M. A. Arch. Ophth. 61:14, 1959.Crossref 2. Armaly, M. F.: Studies on Intraocular Effects of the Orbital Parasympathetics: II. Effect on Intraocular Pressure , A. M. A. Arch. Ophth. 62:117, 1959.Crossref 3. Armaly, M. F.: Effects of Electrical Stimulation of the Orbital Parasympathetic Pathway on Intraocular Pressure , Am. J. Ophth. 45:924, 1958. 4. Armaly, M. F.: Effect of Parasympathetic Stimulation on the Anterior Segment of the Cat's Eye, Tr. Am. Acad. Ophth., to be published. 5. Becker, B., and Constant, M. A.: The Facility of Aqueous Outflow , A. M. A. Arch. Ophth. 55: 305, 1956.Crossref 6. Bárány, E. H., and Scotchbrook, S.: Influence of Testicular Hyaluronidase on the Resistance to Flow Through the Angle of the Anterior Chamber , Acta physiol. scandinav. 30: 240, 1954.Crossref 7. Purnell, E. W.; Melton, C. E., and Adams, E. Q.: The Effects of Nerve Stimulation on Aqueous Outflow in Enucleated Eyes , Am. J. Ophth. 42:182 (Oct., (Pt. 2) ) 1956. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png A.M.A. Archives of Ophthalmology American Medical Association

Studies on Intraocular Effects of the Orbital Parasympathetic Pathway: III. Effect on Steady-State Dynamics

ARMALY, MANSOUR F.
A.M.A. Archives of Ophthalmology , Volume 62 (5) – Nov 1, 1959
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References (8)

Publisher
American Medical Association
Copyright
Copyright © 1959 American Medical Association. All Rights Reserved.
ISSN
0096-6339
DOI
10.1001/archopht.1959.04220050079013
Publisher site
See Article on Publisher Site

Abstract

Abstract The effects of electrical stimulation of the orbital parasympathetic pathway in the cat on the chamber angle and meshwork and on the intraocular pressure,1,2 as reported previously, pointed towards a possible associated increase in the facility of outflow of aqueous. This possibility was specifically investigated in 105 experiments in the anesthetized cat, as well as in the enucleated eye. The results, which will be the subject of this communication, revealed that during parasympathetic stimulation there was a marked increase in the facility of outflow which was due entirely to the activity of the ciliary muscle rather than to the associated constriction of the pupil. Techniques This presentation will be limited to the details of the constant-pressure perfusion and the constant-rate perfusion techniques, because they provide a measurement of the outflow facility which is independent of the elasticity constant of the eyeball and of elasticity changes that might accompany Parasympathetic References 1. Armaly, M. F.: Studies on Intraocular Effects of the Orbital Parasympathetic Pathway: I. Technique and Effects on Morphology , A. M. A. Arch. Ophth. 61:14, 1959.Crossref 2. Armaly, M. F.: Studies on Intraocular Effects of the Orbital Parasympathetics: II. Effect on Intraocular Pressure , A. M. A. Arch. Ophth. 62:117, 1959.Crossref 3. Armaly, M. F.: Effects of Electrical Stimulation of the Orbital Parasympathetic Pathway on Intraocular Pressure , Am. J. Ophth. 45:924, 1958. 4. Armaly, M. F.: Effect of Parasympathetic Stimulation on the Anterior Segment of the Cat's Eye, Tr. Am. Acad. Ophth., to be published. 5. Becker, B., and Constant, M. A.: The Facility of Aqueous Outflow , A. M. A. Arch. Ophth. 55: 305, 1956.Crossref 6. Bárány, E. H., and Scotchbrook, S.: Influence of Testicular Hyaluronidase on the Resistance to Flow Through the Angle of the Anterior Chamber , Acta physiol. scandinav. 30: 240, 1954.Crossref 7. Purnell, E. W.; Melton, C. E., and Adams, E. Q.: The Effects of Nerve Stimulation on Aqueous Outflow in Enucleated Eyes , Am. J. Ophth. 42:182 (Oct., (Pt. 2) ) 1956.

Journal

A.M.A. Archives of Ophthalmology – American Medical Association

Published: Nov 1, 1959

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