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In ankylosing spondylitis transmissibility was enhanced at 4 Hz but less so between 5 and 13 Hz and little attenuation was observed at the higher frequencies. This difference is expected in view of the pathological changes occurring in the spinal column in ankylosing spondylitis. The results support the hypothesis that the normal spinal column has to bend in order to absorb vibrations with a frequency greater than 15 Hz.<\/jats:p>","DOI":"10.1243\/pime_proc_1989_203_037_01","type":"journal-article","created":{"date-parts":[[2007,2,20]],"date-time":"2007-02-20T12:30:09Z","timestamp":1171974609000},"page":"187-190","source":"Crossref","is-referenced-by-count":22,"title":["Shock Absorption by the Spinal Column in Normals and in Ankylosing Spondylitis"],"prefix":"10.1177","volume":"203","author":[{"given":"P S","family":"Helliwell","sequence":"first","affiliation":[{"name":"Rheumatology and Rehabilitation Research Unit, School of Medicine, University of Leeds"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J E","family":"Smeathers","sequence":"additional","affiliation":[{"name":"Rheumatology and Rehabilitation Research Unit, School of Medicine, University of Leeds"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"V","family":"Wright","sequence":"additional","affiliation":[{"name":"Rheumatology and Rehabilitation Research Unit, School of Medicine, University of Leeds"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[1989,12,1]]},"reference":[{"key":"bibr1-PIME_PROC_1989_203_037_01","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(72)90179-1"},{"key":"bibr2-PIME_PROC_1989_203_037_01","doi-asserted-by":"publisher","DOI":"10.1093\/oxfordjournals.aje.a112135"},{"key":"bibr3-PIME_PROC_1989_203_037_01","first-page":"5","volume":"10","author":"Rumyantsev G. 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