Masahiko Seki

ORCID: 0009-0004-8877-9684
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About
Contact & Profiles
Research Areas
  • Spine and Intervertebral Disc Pathology
  • Musculoskeletal pain and rehabilitation
  • Chronic Obstructive Pulmonary Disease (COPD) Research
  • Spinal Fractures and Fixation Techniques
  • Birth, Development, and Health
  • Cancer, Hypoxia, and Metabolism
  • Aortic Disease and Treatment Approaches
  • Dysphagia Assessment and Management
  • Medical Imaging and Analysis
  • Scoliosis diagnosis and treatment
  • Case Reports on Hematomas
  • Congenital Heart Disease Studies
  • Metabolism and Genetic Disorders
  • Botulinum Toxin and Related Neurological Disorders
  • Nerve Injury and Rehabilitation
  • Orthopaedic implants and arthroplasty
  • Voice and Speech Disorders
  • Respiratory Support and Mechanisms
  • Medical Imaging and Pathology Studies
  • Tracheal and airway disorders
  • Peripheral Nerve Disorders
  • Hormonal Regulation and Hypertension
  • Muscle activation and electromyography studies
  • Spinal Hematomas and Complications
  • Anesthesia and Pain Management

National Defense Medical College
2020-2024

National Archives and Records Administration
2016

Osaka University
2013

Osaka Hospital
2003

Ono Clinic
2003

Osaka City University
1991-2002

Jichi Medical University
2002

Gunma University
1992

Fukuoka University
1982-1991

Juntendo University
1990

The purpose of this study was to evaluate the availability recombinant human bone morphogenetic protein-2 (rhBMP-2) combined with hydroxyapatite (HA) and autogenous bone. Posterolateral intertransverse fusion between fifth sixth lumbar vertebrae performed in 27 adult Japanese white rabbits. These rabbits were classified into three groups: group, HA morphogenic protein (BMP) group. In (0.5 g) mixed iliac grafted. BMP soaked rhBMP-2 (100 mg) At 6 weeks after procedure, union evaluated. all...

10.1097/00024720-200206000-00013 article EN Journal of Spinal Disorders & Techniques 2002-06-01

Study Design. The histologic and ultrastructural changes in the posterior ramus after lumbar surgery were studied rabbits. Objective. To investigate structural that may cause injury to procedure. Summary of Background Data. Investigators previous studies have pointed out low back discomfort discectomy relates neurogenic and/or myogenic paravertebral muscle. However, no study has demonstrated effects excessive nerve root retraction on spinal rami. Methods. Eighteen male Japanese White rabbits...

10.1097/00007632-200002150-00005 article EN Spine 2000-02-01

A new genetic variant apolipoprotein (apo), A-I Yame, was discovered during screening for apoA-I variants with isoelectric focusing gel electrophoresis. To investigate the structural abnormality of we amplified gene isolated from proband's peripheral blood leukocytes polymerase chain reaction (PCR) method and directly sequenced these PCR fragments. ApoA-I Yame found to have aspartic acid (GAC) substituted by tyrosine (TAC) at residue 13. We also identified this substitution an automated DNA...

10.1016/s0022-2275(20)41957-1 article EN cc-by Journal of Lipid Research 1991-08-01

Evaluation of recorded potentials from the lumbar spine after stimulation peroneal nerve in patients with piriformis syndrome is reported.To report a new method diagnosis syndrome.Clinically, Freiberg and Pace signs were used to diagnose this entity. Among imaging examinations, computed tomography magnetic resonance have been used. An electrophysiological using H reflex has also reported. However, best for yet be clearly established.After having an epidural electrode inserted into spine, lay...

10.1097/00007632-200301150-00022 article EN Spine 2003-01-01

Abstract We investigated the relationship between trunk muscle mass and spinal pathologies by gender. This multicenter cross-sectional study included patients aged ≥ 30 years who visited a outpatient clinic. Trunk appendicular were measured using bioelectrical impedance analysis. The Oswestry Disability Index (ODI), visual analog scale (VAS) score for low back pain, sagittal vertical axis (SVA), EuroQol 5 Dimension (EQ5D) to evaluate pathology. association these parameters was analyzed...

10.1038/s41598-021-87334-4 article EN cc-by Scientific Reports 2021-04-09

Chondromas are benign tumors that rarely located in the spine. The authors present a rare occurrence of spinal chondroma developed as an intradural but extramedullary tumor 60-year-old woman. location at C4-5 was confirmed by MRI, with hyperintensity on T2-weighted images and isointensity T1-weighted images. completely contained intradurally, no continuity to any vertebrae. It adhered anterior dura, indicative its likely origin from dura mater. resected, sign recurrence after 3 years...

10.3171/2016.8.spine16152 article EN Journal of Neurosurgery Spine 2016-10-14

Laryngotracheal stenosis after inhalation injury can occur not only in the acute period but also late period. Stenosis usually develops one area and, some cases, may require intubation or tracheostomy. However, selecting treatment for extensive laryngotracheal patients with severe mental retardation be difficult. A 20-year-old man intellectual disabilities was admitted to our emergency department burns on face and lower limbs. Severe suspected; therefore, performed. The patient extubated day...

10.1016/j.burnso.2024.06.006 article EN cc-by Burns Open 2024-06-13

10.1016/j.jocn.2005.09.013 article EN Journal of Clinical Neuroscience 2006-06-24

The effects of electrical stimulation the motor and cutaneous branch radial nerve on spinal cord blood flow (SCBF) in cervical region correlation between changes SCBF amplitudes evoked potentials were investigated cats anesthetized with alpha-chloralose. When measured by hydrogen clearance technique, stimuli branch, significantly (P < 0.01) increased from 37 +/- 8 (mean SD) to 59 27 ml.100 g-1.min-1 at 10 Hz 39 6 54 9 30 Hz, but had no effect. laser Doppler flowmetry, caused a small,...

10.1097/00007632-199310000-00014 article EN Spine 1993-10-01

The 10D1 Ag is a 90-kDa homodimeric molecule specifically expressed on subpopulation of human T cells, and involved in an alternative pathway cell activation. In the present study, we have examined expression function thymocytes. Three-color FMF analysis showed that was highly minor but distinct subpopulations double-negative CD4 single-positive thymocytes, weakly part double-positive not CD8 vast majority 10D1+ cells were immature thymocytes CD7+2+3- phenotype. Interestingly, mAb could...

10.4049/jimmunol.145.4.1053 article EN The Journal of Immunology 1990-08-15

Serum immunoreactive inhibin of the luteal phase was measured by radioimmunoassay in 71 patients vitro fertilization and embryo transfer (IVF-ET). The correlation between pregnancy outcome serial pattern from to early gestation studied. In nonconception cycles (n = 35), serum concentration rose reached a peak level around 5 or 6 days after oocyte pick-up (OPU), then fell follicular phase. conception 22), levels again 10-15 OPU. were significantly higher 10 OPU multiple 5) than single 17)....

10.1159/000182356 article EN Hormone Research 1992-01-01
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