Kei Miyamoto

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STUDY DESIGN The axonal growth potential of dorsal root ganglion (DRG) neurons in an organ culture system was investigated. OBJECTIVE To examine the effects of neuronal injury and tumor necrosis factor-alpha (TNF-alpha) on the axonal growth potential of 2 types of nociceptive DRG neurons: nerve growth factor (NGF)-sensitive and glial cell line-derived(More)
The authors discuss the cases of three patients in whom thoracic paraplegia developed after lumbar spinal decompressive surgery for slight lumbar spinal canal stenosis. Careful computerized tomography myelography and magnetic resonance imaging examination of the thoracic spine revealed another compressive lesion (spinal cord tumor, disc herniation,(More)
PURPOSE Laminectomy is generally the treatment of choice for removal of spinal tumors. However, it has been shown that laminectomy may cause instability due to damage of posterior elements of the spinal column, which may induce subsequent kyphosis in the future. Therefore, to reduce the risk of deformity and spinal instability after laminectomy,(More)
The purpose of this study was to quantitatively evaluate spontaneous body sway during maximum grasping maneuver with a hand dynamometer, which we sometimes encounter in clinical practice. The postural reaction of the whole body during maximum grasping maneuver was analyzed in 26 right-handed healthy male volunteers using a three-dimensional motion analysis(More)
BACKGROUND Although attention has been paid to the relationship between the changes in blood circulation in erector spinae muscles and back pain, little is known about their hemodynamics in several various comparable postures with and without loading. Studies on hemodynamics of erector spinae muscles using near-infrared spectroscopy have been performed on(More)
A patient with postlaminectomy kyphosis with a neurological deficit which developed following the initial surgical treatment is reported. A 49-year-old man, complaining of neck pain, sought treatment in 1995. An extramedullary cervical spinal tumor was diagnosed and C2-C4 laminectomy and resection of the tumor were performed. Recurrence of the tumor was(More)
A vertebral hemangioma with dural compression and neurological deficit is rare. We report a symptomatic lumbar vertebral hemangioma which was successfully managed with total spondylectomy. The patient was a 31-year-old man whose chief complaint was low back pain. He had a slight sensory disturbance in the right thigh. Plain radiography and magnetic(More)
PURPOSE To evaluate the clinical outcomes of cantilever transforaminal lumbar interbody fusion (c-TLIF) for upper lumbar diseases. MATERIALS AND METHODS Seventeen patients (11 males, 6 females; mean ± SD age: 62 ± 14 years) who underwent c-TLIF using kidney type spacers between 2002 and 2008 were retrospectively evaluated, at a mean follow-up of 44.1 ±(More)
Eye retraction behavior has evolved independently in some vertebrate linages such as mudskippers (fish), frogs and salamanders (amphibians), and cetaceans (mammals). In this paper, we report the eye retraction behavior of the giant guitarfish (Rhynchobatus djiddensis) for the first time, and discuss its mechanism and function. The eye retraction distance(More)