{"id":3522,"date":"2000-09-21T17:44:12","date_gmt":"2000-09-22T00:44:12","guid":{"rendered":"https:\/\/www.activator.com\/?p=3522"},"modified":"2023-06-07T08:32:01","modified_gmt":"2023-06-07T15:32:01","slug":"correlation-of-l5-dynamic-posteroanterior-spinal-stiffness-to-plain-film-radiographic-images-of-lumbosacral-disc-height","status":"publish","type":"post","link":"https:\/\/activator.com\/correlation-of-l5-dynamic-posteroanterior-spinal-stiffness-to-plain-film-radiographic-images-of-lumbosacral-disc-height\/","title":{"rendered":"Correlation of L5 Dynamic Posteroanterior Spinal Stiffness to Plain Film Radiographic Images of Lumbosacral Disc Height"},"content":{"rendered":"<h3>Abstract<\/h3>\n<p>Assessments of spinal stiffness are becoming more\u00a0 popular in recent years as a objective biomechanical means to evaluate\u00a0 the human frame. Studies investigating posteroanterior (PA) forces in\u00a0 spinal stiffness assessment have shown relationships to spinal level,\u00a0 body type, and lumbar extensor muscle activity. Such measures may be\u00a0 important determinants to discriminate between patients with low back\u00a0 pain and asymptomatic subjects. However, little objective evidence is\u00a0 available discerning variations in PA stiffness and its clinical\u00a0 significance. No study has investigated the relationships of invivo PA\u00a0 spinal stiffness to radiographic images. L5-S1 disc to body height\u00a0 ratios were calculated from digitized plane film lateral radiographs of\u00a0 eighteen symptomatic LBP patients (8 females and 10 males, 15-69 years,\u00a0 mean 44.3 SD 15.4 years). Posterior disc height ratio (PDR) and anterior\u00a0 disc height ratio (ADR) were compared to the L5 posterior-anterior\u00a0 dynamic effective stiffness determined using a validated in vivo\u00a0 mechanical impedance assessment procedure [1]. Dynamic effective\u00a0 stiffness (N\/m) was calculated from the impedance-frequency response\u00a0 spectrum as the dynamic mechanical impedance (Force\/Velocity, Ns\/m) x\u00a0 circular frequency (rad\/sec). Dynamic effective stiffness (minl) at the\u00a0 first resonance frequency (fminl)is reported. No correlation was noted\u00a0 between minl and ADR at L5. However, minl was positively correlated to\u00a0 the PDR at L5 {minl=232 x PDR + 32 (R=0.76)}. Dynamic spinal stiffness\u00a0 assessments may provide additional biomechanical data that may be prove\u00a0 to be of use to clinicians in the diagnosis of lumbar spinal disorders.<\/p>\n<hr \/>\n<p><strong>Reference:<\/strong> Christopher J. Colloca,DC; Tony S. Keller,PhD; Terry\u00a0 K. Peterson,DC; Daryn E. Seltzer,DC; Arlan W. Fuhr,DC. Proceedings of the International\u00a0 Conference on Spinal Manipulation , Sept 21-23,2000.<\/p>\n<script>function getWR360PopupSkin(){return 'light_clean';}<\/script>","protected":false},"excerpt":{"rendered":"<p>Abstract Assessments of spinal stiffness are becoming more\u00a0 popular in recent years as a objective biomechanical means to evaluate\u00a0 the human frame. Studies investigating posteroanterior (PA) forces in\u00a0 spinal stiffness assessment have shown relationships to spinal level,\u00a0 body type, and lumbar extensor muscle activity. Such measures may be\u00a0 important determinants to discriminate between patients with [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[34,8,4],"tags":[45,47],"class_list":["post-3522","post","type-post","status-publish","format-standard","hentry","category-conference-presentation","category-lumbar-spine","category-research","tag-lumbar","tag-spine"],"acf":[],"_links":{"self":[{"href":"https:\/\/activator.com\/wp-json\/wp\/v2\/posts\/3522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/activator.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/activator.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/activator.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/activator.com\/wp-json\/wp\/v2\/comments?post=3522"}],"version-history":[{"count":1,"href":"https:\/\/activator.com\/wp-json\/wp\/v2\/posts\/3522\/revisions"}],"predecessor-version":[{"id":133739,"href":"https:\/\/activator.com\/wp-json\/wp\/v2\/posts\/3522\/revisions\/133739"}],"wp:attachment":[{"href":"https:\/\/activator.com\/wp-json\/wp\/v2\/media?parent=3522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/activator.com\/wp-json\/wp\/v2\/categories?post=3522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/activator.com\/wp-json\/wp\/v2\/tags?post=3522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}