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A prospective analysis of the sagittal profile of 100 healthy young adult volunteers was carried out in order to evaluate the relationship between the shape of the pelvis and lumbar lordosis and to create a databank of the morphologic and positional parameters of the pelvis and spine in a normal healthy population. Inclusion criteria were as follows: no(More)
STUDY DESIGN A review article. OBJECTIVES The purpose of this article is to review pertinent radiologic measurements for the evaluation of spino-pelvic balance in developmental spondylolisthesis, based on the experience of the Spinal Deformity Study Group. SUMMARY OF BACKGROUND DATA Over the past decade, pelvic morphology has been shown to significantly(More)
OBJECTIVE The purpose of this study is to introduce a method to analyze and characterize the global sagittal balance of the human trunk using indexes derived from the shape and orientation of the pelvis and cervical, thoracic, and lumbar spine. METHODS Standing lateral x-rays of a cohort of 160 asymptomatic young adult volunteers were obtained. On each(More)
PURPOSE OF THE STUDY The main objective of this study was to describe the morphology and the mechanism underlying the organization of lumbar lordosis in terms of position and shape of the pelvis. A classification of lumbar lordosis was proposed based on the orientation of the sacral plane. MATERIAL AND METHODS One hundred sixty asymptomatic young adult(More)
STUDY DESIGN A retrospective study of the sagittal alignment in developmental spondylolisthesis. OBJECTIVES To investigate the role of pelvic anatomy and its effect on the global balance of the trunk in developmental spondylolisthesis. SUMMARY OF BACKGROUND DATA Pelvic incidence (PI) is a fundamental anatomic parameter that is specific and constant for(More)
In order to establish a sagittal plane curve reference table for standing subjects examined laterally, we determined an easily reproducible standard posture. A sample of 100 healthy subjects from 20 to 29 years of age, was chosen (43 women, 57 men). The reciprocal angulations of each vertebral body in relation to the others were fed into a digitalizer and(More)
When video-based motion analysis systems are used to measure segmental kinematics, the major source of error is the displacement of skin-fixed markers relative to the underlying skeletal structure. Such displacements cause the marker representation of the segment to deform, thereby decreasing the accuracy of subsequent three-dimensional kinematic(More)
The goal of this study was to adapt roentgen photogrammetry to in vivo studies of shoulder skeletal motion during arm elevation in the scapular plane. Numerous in vitro and in vivo studies have been published describing shoulder bone movements. They involve plain radiographic measurements and utilize a three-dimensional (3D) approach. Measurements are(More)
The kinematic function of the cervical spine has been examined previously by means of cineradiography or a sequence of lateral X-rays, usually of a flexion-extension range of motion. Interpretation of these studies, however, presents difficulties. One of the major problems is how to extract information from the X-ray images which is not only explicit,(More)