Intraoperative length and tension curves of human eye muscles. Including stiffness in passive horizontal eye movement in awake volunteers

Archives of Ophthalmology
H J SimonszB van Dijk

Abstract

Intraoperative continuous-registration length and tension curves of attached and detached eye muscles were made in 18 strabismic patients under general anesthesia. For relaxed eye muscles, we found an exponential relation between length and tension. An increased stiffness was quantified in Duane's syndrome, Graves' disease, orbital-floor fracture, and superior oblique palsy. The stiffnesses of agonist and antagonist were remarkably similar, not only in uncomplicated squint, but also when only one of the two had initially become stiffer. After intravenous administration of succinylcholine chloride, the eye muscles contracted, and the exponential length and tension curve changed into a set of straight, parallel lines. In addition, we measured stiffness in passive horizontal eye movement in awake volunteers and found 0.52 to 1.26 g/degrees (other eye in 5 degrees of adduction), confirming other published results.

Citations

Jun 15, 1994·American Journal of Ophthalmology·A L RosenbaumK Buzard
Nov 1, 1987·Documenta Ophthalmologica. Advances in Ophthalmology·H J Simonsz, B van Dijk
Oct 28, 2008·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Sander SchutteHuib J Simonsz
Jan 1, 1996·Strabismus·H J Simonsz, H Spekreijse
Oct 26, 1999·Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus·S E BrooksM H Johnson
Jan 1, 1989·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·C Boylan, R A Clement
Jan 18, 2006·Vision Research·Sander SchutteHuibert J Simonsz
Oct 1, 1988·Documenta Ophthalmologica. Advances in Ophthalmology·H J SimonszB van Dijk
Oct 26, 1999·Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus·S E BrooksM Johnson
May 1, 1995·Survey of Ophthalmology·J D PorterJ K Brueckner

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