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여상준,박승원,김영백,황성남,최덕영,석종식,정동규,민병국,Yeo, Sang-Jun,Park, Seung-Won,Kim, Young-Baeg,Hwang, Sung-Nam,Choi, Duck-Young,Suk, Jong-Sik,Chung, Dong-Kue,Min, Byung-Kook 대한신경외과학회 2000 Journal of Korean neurosurgical society Vol.29 No.11
Objectives : Transpedicular screw fixation has become an important method for internal fixation in variety of disorders. However, acceleration of degeneration at the adjacent segment in any follow. The goal of this study is to review the change of motion ranges of vertebral joints adjacent to fused level in lumbar spine. Methods : This study consists of 22 patients with degenerative spinal instability. Treatment of spinal instability includes posterior fusion with transpedicular screw fixation or transpedicular screw fixation with posterior lumbar interbody fusion. The flexion-extension angle(FEA) was measured from dynamic views of lumbar spine taken both at preoperative and post operative period. Results : The FEA of upper vertebral joint adjacent(FEA-u) to a fused L4-5 level was increased(p=0.010). The FEA-u was increased in case of L5-S1 fusion(p=0.025). The change of FEA-u in case of L5-S1 fusion was greater than that in L4-5 fusion(p=0.013). Conclusion : After L4-5 fusion, there seems to be more meaningful increase in FEA of L3-4 than that of L5-S1. The reason may be due to the damage of L3-4 facet joints during the operation, the other possible explanation may be the anatomical stability of L5-S1 vertebral joint. The change of FEA-u of L5-S1 fusion is increased more than that of L4-5 fusion. Because there are compensations in the adjacent vertebrae both above and below the fused L4-5, the compensatory motion in FEA-u of L5-S1 fusion was greater than that of the L4-5 fusion.
The purpose of this study tried to identify what muscles show the most effective muscle activity through activity differences in each muscle and Kettlebell swing and Lunge known to be efficient for strengthening the lower limb leg by measuring and comparing muscle activities of lower limb muscles, including hip muscles, while performing Kettlebell swing and Lunge. A total of 24 healthy boy students were selected as subjects of this study, who had no pain nor surgical history of the knee or hip. Then, they were asked to perform Kettlebell swing and Lunge, 3 sets of 5 times at 50% of 1RM. The results of this study showed that the average muscle activity and the maximum muscle activity of Biceps femoris, gluteus maximus(p<.001), and gluteus medius made a statistically significant difference during Kettlebell swing (p<.001). These results are thought to be provided as basic materials for the development of programs for effectively strengthening low limb muscles.
The purpose of this study tried to identify what muscles show the most effective muscle activity through activity differences in each muscle and Kettlebell swing known to be efficient for strengthening the lower limb leg by measuring and comparing muscle activities of lower limb muscles, including hip muscles, while performing Kettlebell swing. A total of 24 healthy boy students were selected as subjects of this study, who had no pain nor surgical history of the knee or hip. Then, they were asked to perform Kettlebell swing, 3 sets of 5 times at 50% of 1RM. The results of this study showed that the average muscle activity and the maximum muscle activity of Biceps femoris, gluteus maximus, and gluteus medius made a statistically significant difference during Kettlebell swing (p<.001). These results are thought to be provided as basic materials for the development of programs for effectively strengthening low limb muscles.
Objective : The purpose of this study is to report the technical feasibility and the result of one stage operation for the bursting fracture of the thoracolumbar spine by posterior approach. Methods : Seven patients underwent corpectomy and replaced the space with titanium mesh cage filled up with autologous bone pieces through unilateral posterior route after removal of the facet joint and the pedicle followed by pedicle screw fixation at the same surgical field. Results : All patients tolerated the procedures well except one patient complicated with air embolism. Postoperative radiographs showed effective decompression and well placed instruments. Preoperative neurological deficits disappeared completely in two patients but some deficits persisted in the remainders. In two patients, epidural venous bleeding was troublesome and he needed transfusion of 5 pints of packed red blood cell. And another patient complicated with air embolism during operation was recovered with impunity after operation. To insert the mesh cage through the narrow corridor posterolaterally, it was unavoidable to sacrifice one spinal root. Conclusion : In spite of technical difficulty, one stage spondylodesis for the bursting thoracolumbar spine though unilateral posterior approach seem to be an effective operative procedure.
Intracranial germ cell tumors are rare lesions that account for 0.3 to 3.4% of all intracranial tumors. Although pure forms are rare, intracranial germ cell tumors are classified into five types:germinomas, teratomas, embryonal carcinomas, endodermal sinus tumors and choriocarcinomas. Teratomas are embryonal neoplasms composed of tissues that are derived from three germinal layers, the endoderm, mesoderm, and ectoderm. They may be solid or cystic and are classified histologically as mature, immature, and malignant. Intracranial teratomas have a predilection for the supratentorial and midline sites, especially pineal area. These are arise commonly in the neonatal period. Advances in neuroradiology and microsurgical techniques now make early diagnosis and successful treatment in many of these patients. We present a rare case of malignant teratoma in suprasellar region of a young boy. A complete excision of the tumor was achieved by pterional approach. Histological diagnosis of the tumor was teratoma with malignant components. The management, pathologic feature and clinical course of this unusual malignancy are discussed with a review of the literatures.
An animal model of spinal cord trauma is essential for understanding the injury mechanisms, cord regeneration, and to aid the development of new therapeutic modalities. This study focused on the development of a graded experimental con-tusion model for spinal cord injury (SCI) using a pneumatic impact device made in Korea. A contusive injury was made to the dorsal aspect of the cord. Three trau-ma groups were defined according to the impact velocity (IV). A control group (n=6), received laminectomy only. Group 1 (n=10), 2 (n=10), and 3 (n=10) had IVs of 1.5 m/sec, 2.0 m/sec, and 3.5 m/sec respectively. Functional assessments were made up to the 14th day after injury. The cord was removed at the 14th post-injury day and prepared for histopathologic examination. Significant behavioral and histopathological abnormalities were found in control and each trauma group. All trauma groups showed severe functional impairment immediately after injury but following different rates of functional recovery (Fig. 5). As the impact velocity and impulse increased, the depth of contusive lesion revealed to be profound the results show that the rat model reproduces spinal cord lesions consistently, has a distinctive value in assessing the effects of impact energy.