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STUDY DESIGN A prospective study. OBJECTIVE To evaluate the effectiveness of prophylactic C4/C5 microforaminotomy with open-door laminoplasty for cervical myelopathy in preventing postoperative C5 palsy. SUMMARY OF BACKGROUND DATA Postoperative C5 palsy is a common complication of cervical laminoplasty. Although the etiology of C5 palsy and preventive(More)
BACKGROUND There have been no standardized surgical options for severe scoliotic curvatures ≥100°. Halo-gravity traction is a viable option for surgical treatment of severe scoliosis. The aim of this study was to evaluate the efficacy and safety of perioperative halo-gravity traction for scoliosis curves ≥100° with respect to radiographic outcomes and(More)
STUDY DESIGN A retrospective study. OBJECTIVE To determine the clinical and imaging characteristics of postoperative C5 palsy after cervical open-door laminoplasty. SUMMARY OF BACKGROUND DATA Postoperative C5 palsy is a common complication of cervical laminoplasty, and although there are several hypotheses regarding its etiology, the pathogenesis and(More)
To examine how the dorsolateral prefrontal cortex (DLPFC) contributes to the decision process of the saccade direction, we recorded single-neuron activity while two monkeys performed two oculomotor delayed-response (ODR) tasks. In an ordinary ODR task, monkeys were required to make a memory-guided saccade to the cue location after a 3-s delay. In a(More)
In this paper, methods for detecting obstacles on a plane using a relative disparity map (RDMap) are proposed and discussed. The RDMap, which was formerly introduced by the author Umeda, is relative to a plane that is observed at first as the reference. It has an interesting feature that a plane in real 3D space also becomes a plane in the map, and has(More)
Osteoporotic fracture in elderly populations is increasing worldwide, but there are few data on the incidence and outcome of osteoporotic fractures, including upper extremity and vertebral fracture, during a certain period in a defined geographic area. The purpose of this study was to determine the incidence of osteoporotic fractures in a particular area:(More)
OBJECT The mechanism underlying cervical flexion myelopathy (CFM) is unclear. The authors report the results of anterior decompression and fusion (ADF) in terms of neurological status and radiographically documented status in young patients and discuss the pathophysiological mechanism of the entity. METHODS Twelve patients underwent ADF in which(More)
Ossification of the posterior longitudinal ligament of the spine (OPLL) is a common spinal disorder among the elderly that causes myelopathy and radiculopathy. To identify genetic factors for OPLL, we performed a genome-wide association study (GWAS) in ∼8,000 individuals followed by a replication study using an additional ∼7,000 individuals. We identified(More)
The objective of this study was to compare efficacy of cervical surgery for myelopathy in patients > or = 70 and < or = 60 years of age. Forty patients > or = 70 years and 50 patients < or = 60 years of age with MRI and CT proven myelopathy were neurologically assessed using the JOA score. Three operative procedures were performed: anterior spinal fusion,(More)