• 제목/요약/키워드: White matter

검색결과 505건 처리시간 0.019초

Advanced neuroimaging techniques for evaluating pediatric epilepsy

  • Lee, Yun Jeong
    • Clinical and Experimental Pediatrics
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    • 제63권3호
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    • pp.88-95
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    • 2020
  • Accurate localization of the seizure onset zone is important for better seizure outcomes and preventing deficits following epilepsy surgery. Recent advances in neuroimaging techniques have increased our understanding of the underlying etiology and improved our ability to noninvasively identify the seizure onset zone. Using epilepsy-specific magnetic resonance imaging (MRI) protocols, structural MRI allows better detection of the seizure onset zone, particularly when it is interpreted by experienced neuroradiologists. Ultra-high-field imaging and postprocessing analysis with automated machine learning algorithms can detect subtle structural abnormalities in MRI-negative patients. Tractography derived from diffusion tensor imaging can delineate white matter connections associated with epilepsy or eloquent function, thus, preventing deficits after epilepsy surgery. Arterial spin-labeling perfusion MRI, simultaneous electroencephalography (EEG)-functional MRI (fMRI), and magnetoencephalography (MEG) are noinvasive imaging modalities that can be used to localize the epileptogenic foci and assist in planning epilepsy surgery with positron emission tomography, ictal single-photon emission computed tomography, and intracranial EEG monitoring. MEG and fMRI can localize and lateralize the area of the cortex that is essential for language, motor, and memory function and identify its relationship with planned surgical resection sites to reduce the risk of neurological impairments. These advanced structural and functional imaging modalities can be combined with postprocessing methods to better understand the epileptic network and obtain valuable clinical information for predicting long-term outcomes in pediatric epilepsy.

19세기 후기의 서양 남성 속옷에 관한 고찰 (Western Men′s Underclothes in The Second Half of The 19C)

  • 김주애
    • 복식문화연구
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    • 제8권2호
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    • pp.261-271
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    • 2000
  • In order to investigate the function and feature of western men's underclothes in the second half of the 19C, in this study, the historical changes of western men's underclothes are compared the first half of the 19C with the second half of the 19C. In the second half of the 19C, the useful function to ease for body was important. In the 1860's, for day-shirt, the tucked panels was disappeared and the front was pain. But the evening dress-shirt continued to show an expansive front tucked. Coloured shirts was used for country and sporting occasions. Ready-made underwear was used. In the 1870's, the plain breast was introduced and the Gladstone collar was used. Paper collars and dickeys were unfashionable. The drawers was composed a gusset at the back of the waistband. The dress of one generation was became the livery of the next. In the 1880's, a new feature was one stud and the use of pique for the breast. Coloured shirt was composed of stripes across the breast. In the 1890's, height of the collar steadily increased. The coat-shirt and regatta shirt became popular. The nice choice of shirt, collar and tie was a matter of supreme importance .The social status of the white shirt was further threatened by fancy coloured shirts. The mode of relaxation affected sports shirts. By the close of this period, both sexes accepted the hygienic rule of wool next the skin.

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Positional Cloning and Phenotypic Characterization of a New Mutant Mouse with Neuronal Migration Abnormality

  • Park, Chankyu;Ackerman, Susan-L
    • 한국발생생물학회:학술대회논문집
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    • 한국발생생물학회 2001년도 발생공학 국제심포지움 및 학술대회 발표자료집
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    • pp.14-17
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    • 2001
  • Positional clonging (map-based cloning) of mutations or genetic variations has been served as an invaluable tool to understand in-vivo functions of genes and to identify molecular components underlying phenotypes of interest. Mice homozygous for the cerebellar deficient folia (cdf) mutation are ataxic, with cerebellar hypoplasia and abnormal lobulation of the cerebellum. In the cdf mutant cerebellum approximately 40% of Purkinje cells are ectopically located within the white matter and the inner granule cell layer (IGL). To identify the cdf gene, a high-resolution genetic map for the cdf-gene-encompassing region was constructed using 1997 F2 mice generated from C3H/HeSnJ-cdf/cdf and CAST/Ei intercross. The cdf gene showed complete linkage disequilibrium with three tightly linked markers D6Mit208, D6Mit359, and D6Mit225. A contig using YAC, BAC, and P1 clones was constructed for the cdf critical region to identify the gene. A deletion in the cdf critical region on chromosome 6 that removes approximately 150 kb of DNA selection. cdf mutant mice with the transgenic copy of the identified gene restored the brain abnormalities of the mutant mice. The positional cloning of cdf gene provides a good example showing the identification of a gene could lead to finding a new component of important molecular pathways.

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1980년대 중반 남성 패션에 나타난 '뉴 맨(New Man)' 이미지 (The Image of 'New Man' in Men's Fashion in the mid-1980s)

  • 염혜정
    • 패션비즈니스
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    • 제15권1호
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    • pp.171-184
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    • 2011
  • This paper is purposed to clarify that an increase of the matter of concern about men's fashion in the mid-1980s was coincided with rapid change of images for men and diversification within the context of economy, society, culture and to analyze the characteristic of each fashion and the meaning. Findings are as follows: 'New men' played a key role creating and communicating the new male image through the media, as a new masculine appeared in the middle of 1980s. Especially it was spreaded into with British as a center between the generations of young men described as a white-collar worker about the ages from 18 to 35 specifically and appeared by the cultural background in accordance with the spread of consumerism, materialism and post modern feminism and the development of men's fashion. There were 2 types of fashion styles for 'New men' image on the media in the mid-1980s. The First is 'power suit look style' which is self-conscious, including 'corporate formal suit look' and 'soft & sexy suit look'. The Second is 'extravagant body conscious style' which characterize the decolletage and androgynous, including 'tough sports look' and 'sexy skirt look'. Lastly, the 'New men' image means a man as a visible object and a man in the image world.

개의 육아종성 뇌수막척수염 증례 보고 (A case of granulomatous meningoencephalomyelitis in a dog)

  • 정지열;조숙희;강윤호;김재훈
    • 대한수의학회지
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    • 제48권4호
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    • pp.463-467
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    • 2008
  • Granulomatous meningoencephalomyelitis (GME) is a sporadic, idiopathic, non suppurative inflammatory disease of the canine central nervous system. GME appears to have a worldwide distribution and to occur mostly in young to middle-age dogs of small breeds. A 6-year-old female mixed dog with wry neck, ataxia and rolling was submitted to the Cheju National University for diagnosis. Grossly, in the brain, cerebrospinal fluid was mildly increased and dilatation of the subarachnoid blood vessels was observed. Histopathologically, the lesions were characterized by perivascular cuffs of lymphocytes, various numbers of macrophages and plasma cells in the brainstem and cerebral white matter. Numerous granuloma composed of lymphocytes and histiocytes were scattered throughout the brainstem. Two malacic foci characterized by axonal swelling and gitter cell infiltration with hemorrhage were noted in the medulla oblongata and cerebellum. Special stains failed to demonstrate any infectious agents. Immunohistochemically, the infiltrated cells demonstrated strong positive reactions for CD3, a marker for T lymphocytes origin. Based on the clinical signs, histopathology, and immunohistochemistry, this case was diagnosed as GME in a mixed dog.

언어치료와 한방치료를 병행한 중풍 피질하실어증 치험 1례(例) (A Case of Subcortical Aphasic Stroke Treated with Speech-Language Therapy and Korean Medical Therapy)

  • 형례창;여진주;유경;서의석;장인수
    • 대한한방내과학회지
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    • 제26권3호
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    • pp.733-740
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    • 2005
  • Subcortical Aphasia is not among the typical eight types of aphasia. It is characterized as cerebral infarction or hemorrhage occurring in the region of the left basal ganglia internal capsule, accompanied with ventrical rounding and white matter. Subcortical aphasia is similar to transcortical aphasia in its symptom of repetition, and classification is difficult. Language ability can change rapidly over several months so a patient's convalescence is unpredictable. Because of the peculiarities of subcortical aphasia there are many conflicting hypotheses. Various clinical approaches and medical treatments for speech disorder(aphasia) have been presented. In Korean medicine, there are many studies about speech disorder, but few reports are related to subcortical aphasia. An aphasic stroke patient who was treated with acupuncture, herbal medicine(Jihwangumja), and speech-language therapy is here reported. Significant improvement in language abilities was seen over three months. Further clinical study of subcortical aphasia is needed.

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방사선조사에 의해 피질이형성증 백서의 전기행동학적, 병리조직학적 특징 (Electrobehavioral and Pathological Characteristics in Cerebral Cortical Dysplasia Induced by External Irradiation in the Rat)

  • 최하영
    • Journal of Korean Neurosurgical Society
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    • 제29권7호
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    • pp.861-867
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    • 2000
  • Purpose : Neuronal migration disorder(NMD) is a major underlying pathology of patients with intractable epilepsy. The role of NMD on seizure susceptibility or epileptogenecity, however, has not been documented. Methods : External irradiation of total amount of 250 cGY was performed to the fetal rats on days 16(E16) and 17(E17) of gestation. After delivery, the rats of 230-260g were decapitated for the histopathologic study. Epileptog-enecity of the NMD was studied by observing electroclinical events after intraperitoneal kainic acid(KA) injection in the control rats and NMD rats. Results : Histopathologic findings revealed focal and/or diffuse cortical dysplasia consisting of dyslamination of the cerebral cortex and appearance of the cytomegalic neurons, neuronal heterotopia in the periventricular white matter, dispersion of the pyramidal layer and the dentate gyrus of the hippocampus, and agenesis of the corpus callosum. Abnormal expression of neurofilaments protein(NF-M/H) was characteristically observed in the dysplastic neurons of the neocortex and hippocampus. Early ictal onset and prolonged ictal activity on EEG and clinical seizures were observed from the NMD rats unlike with the control rats. Conclusions : Exteranl irradiation on the fetal rats produced NMD. And the rats with NMD were highly susceptible to kainic acid provoked seizures. This animal model would be useful to study the pathophysiology of clinically relevant NMDs.

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Extraneural Metastasis of Glioblastoma Multiforme Presenting as an Unusual Neck Mass

  • Seo, Young-Jun;Cho, Won-Ho;Kang, Dong-Wan;Cha, Seung-Heon
    • Journal of Korean Neurosurgical Society
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    • 제51권3호
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    • pp.147-150
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    • 2012
  • Glioblastoma multiforme(GBM) is the most aggressive intracranial tumor and it commonly spreads by direct extension and infiltration into the adjacent brain tissue and along the white matter tract. The metastatic spread of GBM outside of the central nervous system (CNS) is rare. The possible mechanisms of extraneural metastasis of the GBM have been suggested. They include the lymphatic spread, the venous invasion and the direct invasion through dura and bone. We experienced a 46-year-old man who had extraneural metastasis of the G8M on his left neck. The patient was treated with surgery for 5 times, radiotherapy and chemotherapy. He had survived 6 years since first diagnosed. Although the exact mechanism of the extraneural metastasis is not well understood, this present case shows the possibility of extraneural metastasis of the G8M, especially in patients with long survival.

An adverse event following 2009 H1N1 influenza vaccination: a case of acute disseminated encephalomyelitis

  • Lee, Sang-Teak;Choe, Young-June;Moon, Won-Jin;Choi, Jin-Woo;Lee, Ran
    • Clinical and Experimental Pediatrics
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    • 제54권10호
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    • pp.422-424
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    • 2011
  • Acute disseminated encephalomyelitis (ADEM) is an inflammatory demyelinating disease of the central nervous system that typically follows an infection or vaccination and has a favorable long-term prognosis. We describe the first reported case of ADEM after vaccination against novel influenza A (H1N1). A previously healthy 34-month-old boy who developed ADEM presented with a seizure and left-sided weakness 5 days after vaccination against novel influenza A (H1N1). Cerebrospinal fluid examination revealed elevated cell counts. T2-weighted images and fluid-attenuated inversion recovery images revealed multiple patchy hyperintense lesions in the frontal and parietal subcortical white matter and the left thalamus. After the administration of intravenous corticosteroid, the patient's clinical symptoms improved and he recovered completely without neurologic sequelae.

A군 사슬알균 감염 후 사구체신염 환아에서 발생한 가역적 후두부 뇌병증 증후군 1례 (A Case of Posterior Reversible Leukoencephalopathy Syndrome Following Poststreptococcal Glomerulonephritis)

  • 이은경;강진한;마상혁
    • Pediatric Infection and Vaccine
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    • 제22권2호
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    • pp.113-116
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    • 2015
  • 가역적 후두부 뇌병증 증후군은 다양한 원인에 의하여 생기는 발생하는 질환으로 갑자기 생기는 두통, 정신상태의 변화, 시력장애, 경련 등이 주증상이다. 영상의학 검사에서는 후두부 백질의 부종이 양측성 혹은 일측성으로 나타난다. 저자들은 A군 사슬알균 감염 후 가역적 후두부 뇌병증 증후군을 보인 환자를 경험하였고 고혈압을 조절한 후 환자는 빠른 시간 내에 신경학적인 회복을 보였다.