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Vestibular inputs to the cerebral cortex are important for spatial orientation, body equilibrium, and head and eye movements. We examined vestibular input to the periarcuate cortex in the Japanese monkey by analyzing laminar field potentials evoked by electrical stimulation of the vestibular nerve. Laminar field potential analysis in the depths of the(More)
It has been suggested that matrix metalloproteinase-3 (MMP-3, stromelysin-1) has an important role in the degeneration of intervertebral discs (IVDs). A human MMP-3 promoter 5A/6A polymorphism was reported to be involved in the regulation of MMP-3 gene expression. We suggest that IVD degeneration is associated with 5A/6A polymorphism. We studied 54 young(More)
We examined neural response patterns evoked by peripheral nerve stimulation in in vivo rat spinal cords using an intrinsic optical imaging technique to monitor neural activity. Adult rats were anesthetized by urethane, and laminectomy was performed between C5 and Th1 to expose the dorsal surface of the cervical spinal cord. The median, ulnar, and radial(More)
The distal transected cords of infant rats are more permissive for axon extension than those of adults. To elucidate the biomolecular basis for this phenomenon, we examined the expression pattern of neurocan using semi-quantitative reverse transcription polymerase chain reaction and immunostaining in the distal cord of both adult and infant rats after(More)
Neutrotrophin-3 (NT3) plays a protective role in injured central nervous system tissues through interaction with trk receptors. To enhance the regeneration of damaged tissue, a combination therapy with cell transplantation and neurotrophins has been under development. We examined whether the transplantation of neural progenitor cells (NPCs) secreting(More)
STUDY DESIGN Using compound muscle action potentials after train spinal stimulation, intraoperative motor functional monitoring was performed during thoracic and thoracolumbar spinal surgery. OBJECTIVES This study was designed to clarify the clinical usefulness of train spinal stimulation and to determine the critical point of compound muscle action(More)
The long-term effects of the 77-kDa muscle-derived protein (MDP77) on motor and sensory nerve regeneration were examined in vivo. Fourteen-millimeter bridge grafts of the right sciatic nerve of SD rats were carried out with silicone tubes containing a solution of type I collagen together with 0, 5, 10, or 20 microg/ml recombinant human MDP77 (N = 10 in each(More)
STUDY DESIGN Evoked muscle and nerve action potentials after spinal stimulation for intraoperative monitoring were investigated using a modified stimulation technique. Animal experiments and clinical application were performed. OBJECTIVES To contrive a useful method of intraoperative motor pathway monitoring under inhalation anesthesia. SUMMARY OF(More)
On the inner surface of tendon chitosan tubes having a triangular shape and a hydroxyapatite coating (t-chitosan/HAp tube), laminin-1 and laminin peptides (YIGSR, IKVAV) have been adsorbed in order to develop nerve growth conduits. The mechanical property, biocompatibility and efficacy of these tubes for nerve regeneration were examined. Step-1: bridge(More)
Semaphorin 3A (Sema3A) is a diffusible axonal chemorepellent that has an important role in axon guidance. Previous studies have demonstrated that Sema3a(-/-) mice have multiple developmental defects due to abnormal neuronal innervations. Here we show in mice that Sema3A is abundantly expressed in bone, and cell-based assays showed that Sema3A affected(More)