Haruka Shimoda

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Patients with cervical compression myelopathy were studied to elucidate the mechanism underlying boomerang deformity, which results from the migration of the cervical spinal cord between split laminae after laminoplasty with median splitting of the spinous processes (boomerang sign). Thirty-nine cases, comprising 25 patients with cervical spondylotic(More)
OBJECT In vivo quantitative measurement of lumbar segmental stability has not been established. The authors developed a new measurement system to determine intraoperative lumbar stability. The objective of this study was to clarify the biomechanical properties of degenerative lumbar segments by using the new method. METHODS Twenty-two patients with a(More)
Human beings stand upright with the chain of balance beginning at the feet, progressing to the lower limbs (ankles, knees, hip joints, pelvis), each of the spinal segments, and then ending at the cranium to achieve horizontal gaze and balance using minimum muscle activity. The details of the alignment and balance of the chain, however, are not clearly(More)
PURPOSE To elucidate the normative values of whole body sagittal alignment and balance of a healthy population in the standing position; and to clarify the relationship among the alignment, balance, health-related quality of life (HRQOL), and age. METHODS Healthy Japanese adult volunteers [n = 126, mean age 39.4 years (20-69), M/F = 30/96] with no history(More)
A relationship between spinal deformity and ambulation is yet to be clarified. We hypothesized that undesirable spino-pelvic alignment affects walking ability. The purpose of present study is to clarify an influence of spino-pelvic alignments on walking ability. Consecutive patients who visited our institution between October 2011 to September 2012 were(More)
Purpose Normal spinal alignment in standing position can be precisely measured by using EOS imaging which also allows 3-D simulation of the spine. Although sagittal alignment of the spine has been investigated using a conventional x-ray, the data is yet sparse. The purpose of this study is to clarify the alignment of the spine in normal Japanese population(More)
OBJECT This study aimed to clarify changes in segmental instability following a unilateral approach for microendoscopic posterior decompression and muscle-preserving interlaminar decompression compared with traditional procedures and destabilized models. METHODS An ex vivo experiment was performed using 30 fresh frozen porcine functional spinal units(More)
OBJECT The objective of this study was, using a novel intraoperative measurement (IOM) system, to test the hypothesis that an increased facet joint volume is evidence of spinal instability. METHODS In 29 patients (male/female ratio 13:16; mean age 67.5 years, range 43-80 years)-17 with degenerative spondylolisthesis (DS) of the lumbar spine (Group DS) and(More)
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