Atsushi Fujiwara

Learn More
STUDY DESIGN A biomechanical and imaging study of human cadaveric spinal motion segments. OBJECTIVE To investigate the effect of both disc degeneration and facet joint osteoarthritis on lumbar segmental motion. SUMMARY OF BACKGROUND DATA Spinal degeneration includes the osteoarthritic changes of the facet joint as well as disc degeneration. Disc(More)
Major histocompatibility complex (MHC) class Ia genes in salmonid fishes are encoded by a single locus with probably the highest allelic diversity ever described. Various combinations of very different domain lineages contribute to the diversity of alleles. An extensive PCR survey distinguishing most domain lineages and their combinations was established.(More)
Japanese flounder (Paralichthys olivaceus) is one of the most economically important marine species in Northeast Asia. Information on genetic markers associated with quantitative trait loci (QTL) can be used in breeding programs to identify and select individuals carrying desired traits. Commercial production of Japanese flounder could be increased by(More)
STUDY DESIGN Cross-cultural translation and cross-sectional psychometric testing were performed. OBJECTIVES To cross-culturally translate the Oswestry Disability Index (ODI) and the Roland-Morris Disability Questionnaire (RMDQ) into Japanese, and to compare the Japanese Orthopaedic Association (JOA) score with the ODI and the RMDQ score. SUMMARY OF(More)
BACKGROUND CONTEXT A relationship between degenerative changes of the intervertebral disc and biomechanical functions of the lumbar spine has been suggested. However, the exact relationship between the grade of disc degeneration and the flexibility of the motion segment is not known. PURPOSE To investigate the relationship between degenerative grades of(More)
The role of MRI in assessing facet joint osteoarthritis is unclear. By developing a grading system for severity of facet joint osteoarthritis on MRI, the relationship between disc degeneration and facet joint osteoarthritis was determined. The accuracy of MRI in assessing facet joint osteoarthritis against CT was 94%. Under 40 years of age, the degree of(More)
We have isolated and characterized cDNAs and genes for pufferfish, Fugu rubripes, (Fugu) orthologues of mammalian interleukin (IL)-12 subunits (IL-12 p35 and IL-12 p40). The deduced amino acid sequences of the Fugu IL-12 subunits showed homology with mammalian IL-12 subunits (p35: 50.4–58.0% similarity; p40: 51.2–55.4% similarity). Phylogenetic analysis(More)
STUDY DESIGN A biomechanical and anatomic study with human cadaveric lumbar spine. OBJECTIVES The purpose of this study is to examine the morphologic changes in the intervertebral foramen during flexion, extension, lateral bending, and axial rotation of the lumbar spine and to correlate these changes with the flexibility of the spinal motion segments. (More)
STUDY DESIGN Retrospective case series with a control group. OBJECTIVE To measure the diagnostic performance of magnetic resonance imaging (MRI) and MR myelography (MRM) for symptomatic foraminal stenosis in patients who need surgery. SUMMARY OF BACKGROUND DATA MR images are extensively used in the evaluation of foraminal stenosis and are often used to(More)
Several studies have shown an association between sagittal orientation of the facet joint and degenerative spondylolisthesis. There is currently no information available on the association between orientation of the facet joint and osteoarthritis. This study examined the association between orientation and osteoarthritis of the lumbar facet joints. One(More)