Kouichiro Toyoda

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STUDY DESIGN Six cases with distal-type cervical spondylotic amyotrophy are reported. OBJECTIVE To investigate the pathophysiology of distal-type cervical spondylotic amyotrophy from magnetic resonance imaging and intraoperative evoked spinal cord responses. SUMMARY OF BACKGROUND DATA Cervical spondylotic amyotrophy had a characteristic clinical symptom(More)
Several electrophysiologic methods have been used for intraoperative monitoring of spinal cord functions. Recently, muscle responses following transcranial electric stimulation have also been widely used. However, in patients with severe myelopathy, only the spinal cord responses following spinal cord stimulation can be recorded. We report a false-negative(More)
A patient with tuberculous bursitis of the greater trochanter is reported. A 37-year-old woman had experienced persistent dull hip pain and noticed diffuse swelling over the greater trochanteric region. Plain radiograph revealed unremarkable osteopenic changes in the greater trochanter and faint mineralization in the vicinity of the trochanter. Computed(More)
Osteoplastic laminectomy has been used to treat lumbar canal stenosis and to prevent postoperative lumbar spinal instability by reconstructing the posterior element of the lumbar spine, which has been documented in many clinical studies. However, the biological sequence of repairing the posterior lumbar element, which is replaced at the time of surgery, has(More)
To investigate the nerve root distribution of deltoid and biceps brachii muscle, compound muscle action potentials (CMAPs) were recorded intraoperatively following nerve root stimulation in cervical spondylotic myelopathy. A total of 19 upper limbs in 12 patients aged 55-72 years (mean, 65.5 years) with cervical spondylotic myelopathy were examined. CMAPs(More)
A 64-year-old man who presented right drop fingers without pyramidal signs due to cervical spondylosis is reported. Magnetic resonance imaging showed a high signal intensity change on T2-weighted scans of the spinal cord at the C6/7 intervertebral level. Evoked spinal cord potentials following ulnar nerve stimulation were attenuated at the C6/7(More)
A 15-year-old girl was admitted to our hospital with severe low back pain. She had scoliosis dextra and tight hamstrings. A plain radiograph showed high-grade L5 spondylolisthesis with vertebral scalloping from the fourth lumbar to the first sacral vertebra. L5 wide laminectomy and posterior lumbar interbody fusion by iliac bone graft was performed using(More)
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