New Aspects of Ophthalmoneurologic Diagnosis

Abstract

Introduction During the past several years sufficient experience has been gained in the technique of electromyography of the human extraocular muscles to fairly appraise its usefulness.^1-10 As a research tool it is of inestimable value in the analysis of the innervational basis of normal and disordered motility. Fundamental insights are being gained in the mechanisms maintaining normal extraocular muscle balance, so essential to binocular single vision. The sources of tonic innervation of eye muscle, although not well understood, now have become considerably clearer and may eventually be fully revealed in the course of analytic studies. The complex interrelationship of versions and vergences is being clarified, permitting a new understanding of the manner in which central adjustment of opposing sources of innervation is brought about. Through the study of varied types of pathologic involvement of the extraocular muscles it has been possible to make certain preliminary judgments concerning the nature