• Journal of Korean Neurosurgical Society
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• 제61권1호
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• pp.120-126
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• 2018

Intraparenchymal meningiomas without dural attachment are extremely rare, especially when they occur in basal ganglia region in child. An 8-year-old boy was admitted at our hospital, complaining of recurrent headache and vomiting for 3 months. Neurological examination showed impaired vision and mild paresis of the left extremities. Magnetic resonance imaging demonstrated a lesion located in the right basal ganglia region extending to superasellar cistern with solid, multiple cystic and necrotic components. Computed tomography revealed calcification within the mass. Due to the anterior cerebral artery involvement, a subtotal resection was achieved and postoperative radiotherapy was recommended. Histopathological examination indicated that the lesion was an atypical meningioma. The postoperative rehabilitation was uneventful. Mildly impaired vision and motor weakness of left extremities improved significantly and the patient returned to normal life after surgery. To our knowledge, intraparenchymal atypical meningioma in basal ganglia extending to superasellar cistern was never reported. The significance in differential diagnosis of lesions in basal ganglia should be emphasized.

• The Korean Journal of Pain
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• 제14권1호
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• pp.118-122
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• 2001

Complex regional pain syndrome type I of vascular origin is difficult to detect unless the classic symptoms and signs exist and/or overt extremity trauma has precipitated the pain. The diagnosis is confirmed by relief of pain following a sympathetic nerve blockade. A 36-year-old woman with arterial occlusive disease of the right lower extremity presented with burning pain and hyperesthesia after sprain had occurred which was accompanied by motor weakness of right ankle. A lumbar sympathetic ganglion blockade with 2% lidocaine 10 ml and triamcinolone 80 mg produced prompt improvement of the pain and motion.

• The Korean Journal of Pain
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• 제21권3호
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• pp.248-251
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• 2008

The clinical syndrome of posttraumatic syringomyelia can complicate major spinal trauma and develops many months after spinal injury. The 50-90% of patients experienced the pain and especially the component of central pain. In patients with central pain following spinal cord injury, ketamine has been shown to be an effective analgesic. We report a case of posttraumatic syringomyelia in a 30-year-old woman who complained of central pain, weakness of both legs and dysesthesia. She had not responded to pulsed radiofrequency, or lidocaine infusion therapy, but a continuous intravenous infusion of ketamine, an N-methyl-D-asparate receptor antagonist, reduced her severe central pain. In conclusion, a ketamine infusion therapy resulted in a significant reduction of central pain without decreasing of motor power and function.

• Clinics in Shoulder and Elbow
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• 제9권2호
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• pp.246-250
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• 2006

Brachial neuritis is a rare disorder of unknown etiology that affects the lower motor neurons of the brachial plexus. The clinical course is characterized by acute onset of severe pain followed by weakness and gradual recovery. Among diagnostic tests, electromyography may be useful. The brachial neuritis has been confused with other painful shoulder conditions. The awareness of this disorder helps prevent unwarranted diagnostic studies & treatment. The authors report a case of brachial neuritis.

• Journal of Korean Neurosurgical Society
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• 제29권10호
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• pp.1377-1382
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• 2000

Ossification of ligamentum flavum(OLF) is a type of ectopic bone formation developed within the spinal ligament. Thoracic myelopathy is common symptom of OLF but radiculopathy is uncommon. We present 3 operated cases of OLF. Two showed myelopathy and one radiculomyelopathy. Main symptoms were motor weakness, sensory disturbance, incoordination of both legs, and back pain. One patient complained of left girdle pain in T4 dermatome. Deep tendon reflex(DTR) was increased in all cases. The diagnosis was made from myelogram, CT and MRI. Sufficient posterior decompressive laminectomy and medial facetectomy were performed. Postoperative diagnosis was comfirmed by histopathological examination. One patient could return to work 3 months after operation and two patients showed satisfactory improvement 2-3 months after operation. Early diagnosis and appropriate surgical treatment were prerequisite of good outcome.

• Journal of Korean Neurosurgical Society
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• 제45권2호
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• pp.107-111
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• 2009

Meningiomas are usually benign neoplasms in which extracranial metastases occur very rarely. We report a case of multiple extracranial metastases of an atypical meningioma following a local recurrence. A 68-year-old man presented with left-side motor weakness and dysarthria for two weeks. A computed tomography (CT) scan and magnetic resonance imaging (MRI) showed an intraventricular tumor. We performed a total mass removal, and the histopathologic findings were consistent with benign meningioma. Eight months later, the meningioma recurred. We performed a reoperation and whole brain radiation therapy postoperatively. The histopathologic findings showed atypical meningioma. Six months later, CT and MRI revealed metastases to multiple vertebrae, lung, ribs and perirenal soft tissue so a decompressive laminectomy with mass removal was performed. The histopathologic findings of the spinal tumors showed atypical meningioma. The results from perirenal biopsies were consistent with metastatic meningioma. In conclusion, extracranial metastasis as well as local recurrence must be considered in atypical or anaplastic meningioma. There must be regular follow-ups. Finally, an evaluation of the chest, abdomen and bone is necessary, especially when related symptoms or signs develop.

• 한국전문물리치료학회지
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• 제8권3호
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• pp.97-105
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• 2001

The purpose of this study was to investigate the effect of functional strengthening exercise on static and dynamic standing balance in a child with cerebral palsy. The subject was a 7 year old boy with diplegia whose Gross Motor Function Measure (GMFM) score was 80% along with G1 of the lower extremities in Modified Ashworth Scale. The subject was ambulatory with some degree of limitation and demonstrated muscle weakness and strength asymmetry in the lower extremities. A changing criterion design for a single-subject research was used for this study. The functional strengthening exercise consisted of lower extremity ergometer exercise and knee exercise with grading movement in standing position, each for 20 minutes, which lasted 18 sessions for 6 weeks. A knee extensor strength test on both extremities and standing balance test were conducted after each functional strengthening exercise. Two types of standing balance were tested: one leg stance test and functional reach test. One leg stance test was to evaluate static standing balance, and functional reach test was to evaluate dynamic standing balance. The results showed that the functional strengthening exercise had some positive effects on improvement of both static and dynamic standing balance, and there was a positive correlation between the knee strength and standing balance.

• 대한기계학회논문집
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• 제19권5호
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• pp.1176-1181
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• 1995

Microdrilling is one of the most difficult operations because of the poor chip discharge and the weakness of tool. This study is concerned about the development of a microdrilling monitoring system that is useful for minimizing the tool breakage and enhancing the machinability in the air spindle based microdrilling. The system is composed of a drilling state detection unit and an adaptive step-feed control unit that controls the micro-stepping motor driven spindle axis. Drilling states such as overload, tood breakage are recognized by the change of the air spindle speed which is measured via the reflective photo sensor. Based on the monitoring results, the adaptive step-feed control algorithm adjusts the step increment to keep the decrease of spindle speed within a specified range. The results of evaluation tests have shown that the developed system is very effective to prevent the breakage of microdrill and improves the productivity in comparison with the conventional microdrilling.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2008년도 춘계학술대회논문집
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• pp.39-42
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• 2008

In the case of the general helicopter among rotorcraft, length of the rotor blade for thrust-generation is longer than that of fuselage and tail rotor is required in order to compensate moment of the fuselage. For those reasons, enough space for take-off and landing should be secured and an accessibility for building is low. Also, the accidents caused by tail rotor occur frequently. However, the case of counter-rotating has merits that tail rotor is unnecessary as well as length of the rotor blade can be shortened but has a weakness that the weight of body is increased. In the present study, aerodynamic force measurement on single rotor system equipped with NACA0012 airfoil, which has aspect ratio of 6 and chord length of 35.5 mm, was carried out. And measurement was conducted with blade which has a half size of the former blade by using single motor counter-rotating. Aerodynamic force measurement was acquired by using 6-component balances and coefficients of thrust and power were derived along the pitch angle varying from 0$^{\circ}$ to 90$^{\circ}$ with the increment of 10$^{\circ}$. Those aerodynamic force data will be utilized for the design and production of brand-new counter-rotating rotor blade system which has same thrust with single blade system and provides a good accessibility to building by reducing its blade length.

• 대한한의학회지
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• 제22권3호
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• pp.81-91
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• 2001

Objectives : This study was prepared for investigating the clinical features of stroke patients. Methods : We retrospectively reviewed the medical records of 177 patients who were admitted to the Dept. of Internal Medicine, College of Oriental Medicine, Kyungwon University with a diagnosis of stroke from Jan. I, 1999 to Dec. 31, 1999. Results : Ischemic stroke (74.0%) was more common than hemorrhagic stroke (19.8%). The proportion of males was 53.7%, of females was 46.3%, and the most prevalent age group is those in their sixties. Cerebral infarction was most frequently noticed in MCA territory, hemorrhage in putamen. Hypertension was the most common preceding disease, followed by diabetes mellitus. The rate of recurrence was high in cerebral infarction. The onset mode of cerebral infarction was sleeping and rising and of cerebral hemorrhage was acting. Most patients visited the hospital within 24 hours. The most common symptoms at admission were motor weakness and speech disorder. The most common complication was urinary tract infection. Admission period was 29.5 days. Physical treatment from onset in cerebral infarction and in cerebral hemorrhage was 17.4 and 22.0 days, respectively. Conclusions : Our study of CVA patients was similar to previous studies from 1994 to 1998. In most cases, western and oriental treatment and medicine were given synthetically. Prescription of sasang constitutional medicine had wide application.