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| Keywords: ChronicBackache1036.png CHRONIC BACKACHE--REYNOLDS AND LOVETT Journal of the American Medical Association Chicago Ill 1910 REYNOLDS Edwards AND LOVETT Robert W PD Image ChronicBackache1035 png of the method and therefore need not be repeated here Fig 3 --Outline drawing or bad corset applied to a model Fig 6 --Outline drawing or good corset applied to a model <center>OTHER METHODS OF STUDY USED</center> At the beginning of our study we experimented with various methods which proved to he worthless for exact use These were shadowgraphs observations with plumb lines study of the model standing on a glass plate by means of a reflected image in a mirror placed underneath and measurements from an upright without knowing the center of gravity Photographs were largely noed at first without success but later by making two exposures on the same plate with the greatest care to prevent jar of the camera two positions of the model could be recorded with accuracy but any such composite photograph which showed any duplication of outline of the feet was rejected Such photographs were mainly use l in checking the accuracy of our results from our final apparatus Out of several hundred observations made mainly by the apparatus described we finally selected two hundred as reliable for study which form the basis of our present communication <center>MATERIAL STUDIED</center> The study was made for the most part on female nude professional artists' models courteously sent to us by the School of the Boston Museum of Fine Arts In the three and a half years some six of these were under observation our study of one model at first lasting for months while toward the end two or three were under observation during a fortnight We selected female rather than male models because they were more easily obtained and more reliable also because the condition under study occurs much more frequently in women Professional models although clearly the only available material for our purpose present certain disadvantages which we recognized They are necessarily of stable types of figures as otherwise the long-continued assumption of one position necessitated by their occupation would be intolerable whereas we should have preferred to study women of the unstable types of figure Another obstacle lay in their desire to help us and we had carefully to conceal from them the purpose of our inquiry Another difficulty lay in their ability and readiness to assume fixed unnatural positions which in posing for artists they are of course compelled to do We therefore supplemented the observations on these by such observations on patients as could be made without undue expo- Fig 8 --Drawing from composite photograph or model in two positions The center or gravity is not changed in its relation to the feet sure and a few such on normal persons which have also been utilized in formulating our conclusions These observations were then studied in detail carefully correlated and analyzed <CENTER>DEFINITION OF FIELD OF EXPERIMENTAL STUDY</CENTER> A consideration of the results of our physiologic study led us to the conclusion that antero-posterior balance in the upright positiou is maintained by moderate tonicity of the posterior musculature exerted against a slightly anterior position of the center of gravity Reasoning from this led us to further experiments and observations to be presently detailed which scelll to us to show that an important clement in all static backache is to be found in back-strain and that to assume relaxation of the sacro-iliac joints to account for the symptoms founel is neither necessary nor wholly satisfactory As soon Permanent corset treatment School of the Museum of Fine Arts Reynolds and Lovett - Chronic Backache | ||||
