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Jean-Marie Auzende, H.Gary Greene, René Grandperrin, Gregory M. Cailliet
1999 Oceanologica Acta  
Cailliet et al., 'Benefits of swath mapping for the identification of marine habitats in the New Caledonia Economic Zone' by S.  ...  CAILLIET ' a IfremerlDRWGM; see ' for present address b IRD, BP As,98848 Noumea cedex, New Caledonia ' Moss landing Marine Laboratories, PO Box 450, Moss Landing CA 95039, WA  ... 
doi:10.1016/s0399-1784(00)88946-x fatcat:ooasfcpo5ragvh7drbek4lt5si

How do anterior/posterior translations of the thoracic cage affect the sagittal lumbar spine, pelvic tilt, and thoracic kyphosis?

Deed E. Harrison, René Cailliet, Donald D. Harrison, Tadeusz J. Janik
2001 European spine journal  
Harrison DE, Cailliet R, Harrison DD, Janik TJ, Troyanovich SJ, Coleman RR (1999) Lumbar coupling during lateral translations of the thoracic cage relative to a fixed pelvis.  ...  Harrison DE, Harrison DD, Cailliet R, Troyanovich SJ, Janik TJ (2000) Cervical coupling during lateral head translations creates an "S"-configuration. Clin Biomech 15:436-440 10.  ... 
doi:10.1007/s00586-001-0350-1 pmid:12107799 pmcid:PMC3610513 fatcat:6ukmsy3bvvaa3frbdq4fmcqxjq

Changes in sagittal lumbar configuration with a new method of extension traction: Nonrandomized clinical controlled trial

Deed E. Harrison, Rene Cailliet, Donald D. Harrison, Tadeusz J. Janik, Burt Holland
2002 Archives of Physical Medicine and Rehabilitation  
Harrison DE, Cailliet R, Harrison DD, Janik TJ, Holland B. Changes in sagittal lumbar configuration with a new method of extension traction: nonrandomized clinical controlled trial.  ... 
doi:10.1053/apmr.2002.35485 pmid:12422330 fatcat:aqwc6o7mhnfp7h4pnn5kkskz7u

Can the Thoracic Kyphosis Be Modeled With a Simple Geometric Shape?

Deed E. Harrison, Tadeusz J. Janik, Donald D. Harrison, Rene Cailliet, Stacy F. Harmon
2002 Journal of Spinal Disorders & Techniques  
Many Cobb measurements have been reported at various levels for the thoracic kyphosis, but geometric models of the shape of kyphosis are rare. Thoracic vertebral bodies were digitized on 80 normal lateral full-spine radiographs to obtain the mean thoracic kyphosis. Global and segmental angles were determined. Computer iteration processes passed geometric shapes through the posterior body coordinates of the mean thoracic kyphosis to determine the best fit model in the least squares sense. The
more » ... uares sense. The kyphosis was closely modeled with ellipses. The T1 and T12 areas tended to be flatter in curvature when compared with T2-T11, indicating these are inflection points. Mean global angles were Cobb T1-T12 ‫ס‬ 44.2°, Cobb T2-T11 ‫ס‬ 39.9°, and Cobb T3-T10 ‫ס‬ 33.3°. The T2-T11 kyphotic region was closely modeled with approximately a 70°portion of an ellipse, with minor axis to major axis ratios of 0.6 to 0.72, and with major axis parallel to the posterior body margin of T11.
doi:10.1097/00024720-200206000-00008 pmid:12131422 fatcat:2xzkedlcanesvbrqblvumkn2ky

Cobb Method or Harrison Posterior Tangent Method

Deed E. Harrison, Donald D. Harrison, Rene Cailliet, Stephan J. Troyanovich, Tadeusz J. Janik, Burt Holland
2000 Spine  
Study Design. Thirty lateral cervical radiographs were digitized twice by three examiners to compare reliability of the Cobb and posterior tangent methods. Objectives. To determine the reliability of the Cobb and Harrison posterior tangent methods and to compare and contrast these two methods. Summary of Background Data. Cobb's method is commonly used on both anteroposterior and lateral radiographs, whereas the posterior tangent method is not widely used. Methods. A blind, repeated-measures
more » ... peated-measures design was used. Thirty lateral cervical radiographs were digitized twice by each of three examiners. To evaluate reliability of determining global and segmental alignment, vertebral bodies of C1-T1 were digitized. Angles created were two global two-line Cobb angles (C1-C7 and C2-C7), segmental Cobb angles from C2 to C7, and posterior tangents drawn at each posterior vertebral body margin. Cobb's method and the posterior tangent method are compared and contrasted with these data. Results. Of 34 intraclass and interclass correlation coefficients, 28 were in the high range (Ͼ0.7), and 6 were in the good range (0.6 -0.7). The Cobb method at C1-C7 overestimated the cervical curvature (Ϫ54°) and, at C2-C7 it underestimated the cervical curve (Ϫ17°), whereas the posterior tangents were the slopes along the curve (Ϫ26°f rom C2 to C7). The inferior vertebral endplates and posterior body margins did not meet at 90°(C2: 105°Ϯ 5.2°, , which caused the segmental Cobb angles to underestimate lordosis at C2-C3, C4 -C5, and C6 -C7. Conclusions. Although both methods are reliable with the majority of correlation coefficients in the high range (ICC Ͼ 0.7), from the literature, the posterior tangent method has a smaller standard error of measurement than four-line Cobb methods. Global Cobb angles compare only the ends of the cervical curve and cannot delineate what happens to the curve internally. Posterior tangents are the slopes along the curve and can provide an analysis of any buckled areas of the cervical curve. The posterior tangent method is part of an engineering analysis (first derivative) and more accurately depicts cervical curvature than the Cobb method. [
doi:10.1097/00007632-200008150-00011 pmid:10954638 fatcat:i3pxwaixbjbavafazgexzy73fu

Conservative methods for reducing lateral translation postures of the head: A nonrandomized clinical control trial

Deed E. Harrison, Rene Cailliet, Joseph Betz, Jason W. Haas, Donald D. Harrison, Tadeusz J. Janik, Burt Holland
2004 Journal of rehabilitation research and development  
Fifty-one retrospective, consecutive patients were compared to twenty-six prospective volunteer controls in a nonrandomized clinical control trial. Both groups had chronic neck pain and lateral head translation posture. For treatment subjects, beginning and follow-up pain scales and anteroposterior (AP) cervical radiographs were obtained after 12.8 weeks of care (average of 37 visits), while the duration was a mean of 12 months for control subjects. Digitized radiographs were analyzed for
more » ... analyzed for Risser-Ferguson angles and a horizontal translation distance of C2 from a vertical line through T3. For treatment, patients received the Harrison mirror-image postural methods, which include mechanically assisted manipulation, opposite head posture exercise, and opposite head translation posture traction. While no significant differences were found in the control group subjects' pain scores and AP radiographic measurements, statistically significant improvements were observed in the treatment group subjects' pain scores and lateral translation displacements of C2 compared to T3 (pretrial score: 13.7 mm, posttrial score: 6.8 mm) and in angle measurements. Abbreviations: AP = anteroposterior, NDI = Neck Disability Index, NRS = numerical rating scale, SEM = standard error of measurement, SF-36 = Short Form 36.
doi:10.1682/jrrd.2003.05.0070 fatcat:gayqcon62fa5lpoicrobtkpkhu

Modeling of the Sagittal Cervical Spine as a Method to Discriminate Hypolordosis

Donald D. Harrison, Deed E. Harrison, Tadeusz J. Janik, Rene Cailliet, Joseph R. Ferrantelli, Jason W. Haas, Burt Holland
2004 Spine  
Study Design. Computer analysis of digitized vertebral body corners on lateral cervical radiographs. Objectives. Using elliptical and circular modeling, the geometric shape of the path of the posterior bodies of C2-C7 was sought in normal, acute pain, and chronic pain subjects. To determine the least squares error per point for paths of geometric shapes, minor axis to major axis elliptical ratios (b/a), Cobb angles, sagittal balance of C2 above C7, and posterior tangent segmental and global
more » ... ntal and global angles. Summary of Background Data. When restricted to cervical lordotic configurations, normal, acute pain, and chronic pain subjects have not been compared for similarities or differences of these parameters. Conventional Cobb angles provide only a comparison of the endplates of the distal vertebrae, while geometric modeling provides the shape of the entire sagittal curves, the orientation of the spine, and segmental angles. Methods. Radiographs of 72 normal subjects, 52 acute neck pain subjects, and 70 chronic neck pain subjects were digitized. For normal subjects, the inclusion criteria were no kyphotic cervical segments, no cranial-cervical symptoms, and less than Ϯ 10 mm horizontal displacement of C2 above C7. In pain subjects, inclusion criteria were no kyphotic cervical segments and less than 25 mm of horizontal displacement of C2 above C7. Measurements included segmental angles, global angles of lordosis (C1-C7 and C2-C7), height-to-length ratios, anterior weight bearing, and from modeling, circular center, and radius of curvature. Results. In the normal group, a family of ellipses wasfound to closely approximate the posterior body margins of C2-C7 with a least squares error of less than 1 mm per vertebral body point. The only ellipse/circle found to in-clude T1, with a least squares error of less than 1 mm, was a circle. Compared with the normal group, the pain group's mean radiographic angles were reduced and the radius of curvature was larger. For normal, acute, and chronic pain groups, the mean angles between posterior tangents on C2-C7 were 34.5°, 28.6°, and 22.0°, C2-C7 Cobb angles were 26.8°, 16.5°, and 12.7°, and radius of curvature were r ϭ 132.8 mm, r ϭ 179 mm, and r ϭ 245.4 mm, respectively. Conclusions. The mean cervical lordosis for all groups could be closely modeled with a circle. Pain groups had hypolordosis and larger radiuses of curvature compared with the normal group. Circular modeling may be a valuable tool in the discrimination between normal lordosis and hypolordosis in normal and pain subjects.
doi:10.1097/01.brs.0000144449.90741.7c pmid:15543059 fatcat:uesjueemqfaafghj2hvgd73nmi

Validation of a computer analysis to determine 3-D rotations and translations of the rib cage in upright posture from three 2-D digital images

Deed E. Harrison, Tadeusz J. Janik, Rene Cailliet, Donald D. Harrison, Martin C. Normand, Denise L. Perron, Joseph R Ferrantelli
2006 European spine journal  
Introduction Human thoracic cage posture has been of interest since ancient times, especially deformities of the rib cage [20, 25, 35, 36, 45] . In his classic texts, Breig [8] [9] [10] showed that human postures can cause adverse mechanical tension on the central nervous system, thus correlating abnormal posture with disease. During the past century, thoracic posture (axial translation) has been associated with the treatment of disc degeneration and prolapse [13, 37, 50] .
doi:10.1007/s00586-006-0081-4 pmid:16547756 pmcid:PMC2200690 fatcat:7xthdet6jng3fnafiz5i76qurm

A non-randomized clinical control trial of Harrison mirror image methods for correcting trunk list (lateral translations of the thoracic cage) in patients with chronic low back pain

Deed E. Harrison, Rene Cailliet, Joseph W. Betz, Donald D. Harrison, Christopher J. Colloca, Jason W. Haas, Tadeusz J. Janik, Burt Holland
2004 European spine journal  
Spinal trunk list is a common occurrence in clinical practice, but few conservative methods of spinal rehabilitation have been reported. This study is a non-randomized clinical control trial of 63 consecutive retrospective subjects undergoing spinal rehabilitation and 23 prospective volunteer controls. All subjects presented with lateral thoracic-cage-translation posture (trunk list) and chronic low back pain. Initial and follow-up numerical pain rating scales (NRS) and AP lumbar radiographs
more » ... mbar radiographs were obtained after a mean of 11.5 weeks of care (average of 36 visits) for the treatment group and after a mean of 37.5 weeks for the control group. The radiographs were digitized and analyzed for a horizontal displacement of T12 from the second sacral tubercle, verticality of the lumbar spine at the sacral base, and any dextro/levo angle at mid-lumbar spine. Treatment subjects received the Harrison mirror image postural correction methods, which included an opposite trunk-list exercise and a new method of opposite trunk-list traction. Control subjects did not receive spinal rehabilitation therapy, but rather self-managed their back pain. For the treatment group, there were statistically significant improvements (approximately 50%) in all radiographic measurements and a decrease in pain intensity (NRS: 3.0 to 0.8). For the control group, no significant radiographic and NRS differences were found, except in trunk-list displacement of T12 to S1, worsened by 2.4 mm. Mirror image (opposite posture) postural corrective exercises and a new method of trunk-list traction resulted in 50% reduction in trunk list and were associated with nearly resolved pain intensity in this patient population. The findings warrant further study in the conservative treatment of chronic low back pain and spinal disorders.
doi:10.1007/s00586-004-0796-z pmid:15517424 pmcid:PMC3476700 fatcat:lklnfqwoevcz3ir6ej3tqplnru