• Journal of Korean Neurosurgical Society
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• 제61권5호
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• pp.653-659
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• 2018

Objective : Surgical obliteration of ruptured aneurysm of the proximal posterior inferior cerebellar artery (PICA) is challenging because of limited surgical accessibility. In recent years, coil embolization is the first-choice treatment for these lesions. However, coil embolization is not always easy in ruptured PICA aneurysm owing to the variable anatomical diversity of its shapes, its relationship to the parent artery, its low incidence, and accordingly, lesser neurointerventionist experience. Methods : The parent artery and microcatheter for easier navigation and the embolization technique for stable coiling were identified. Results : This study aimed to identify the more appropriate approach route, microcatheter, and strategies for an easier and safer, and more durable coil embolization in the treatment of lesions in the proximal PICA. Conclusion : Coil embolization for aneurysmal subarachnoid hemorrhage due to a ruptured proximal PICA remains a challenge, but with the appropriate coiling plan, it can be treated successfully.

• Journal of Korean Neurosurgical Society
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• 제50권4호
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• pp.327-331
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• 2011

Objective : The aim of this study is to investigate the clinical outcomes of surgery and coiling and analyze the predicting factors affecting the clinical outcomes of ruptured posterior inferior cerebellar artery (PICA) aneurysms. Methods : During the last 15 years, 20 consecutive patients with ruptured PICA aneurysms were treated and these patients were included in this study. The Fisher's exact test was used for the statistical significance of Glasgow Outcome Scale (GOS) according to initial Hunt-Hess (H-H) grade, treatment modalities, and the presence of acute hydrocephalus. Results : Eleven (55%) and nine (45%) patients were treated with surgical clipping and endovascular treatment, respectively. Among 20 patients, thirteen (65.0%) patients had good outcomes (GOS 4 or 5). There was the statistical significance between initial poor H-H grade, the presence of acute hydrocephalus and poor GOS. Conclusion : In our study, we suggest that initial H-H grade and the presence of acute hydrocephalus may affect the clinical outcome rather than treatment modalities in the ruptured PICA aneurysms.

• 한국임상수의학회지
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• 제23권2호
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• pp.91-95
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• 2006

사람에서, Chiari 1형 기형은 소뇌 탈출과 척수공동증이 특정인 발달성 장애이다. 이러한 사람의 Chiari 1형 기형과 유사한 질환이 cavalier King Charles spaniels에서 흔히 나타났다. 그러나, 이러한 Chiari 1형 유사 기형이 다른 종의 개에서 진단 보고된 증례가 거의 없는 실정이다. 이에 본 연구에서는 24 마리의 개에서 자기공명영상 장치를 이용하여 Chiari 1형 유사 기형으로 진단된 증례를 보고하고자 한다. 이 개들은 다양한 신경 증상과 다양한 정도의 소뇌 탈출, 척수공동증, 두개관내 거미막 낭종 또는 뇌수종의 병발 질환들을 나타내었다.

• Applied Microscopy
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• 제25권1호
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• pp.65-74
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• 1995

개의 교핵내의 GABA를 함유한 억제성 신경세포의 연접부위를 전자현미경을 이용한 면역세포화학적 방법으로 조사하였다. 반응산물은 신경원의 핵부위나 가지돌기에서 관찰되었으며, 반응산물을 포함하고 있지 않은 신경종말이 이들과 비대칭형 연접을 형성하였다. 그 외에도 많은 수의 GABA성 신경종말이 관찰되었으며, 이들은 반응산물을 함유하지 않은 가지돌기와 대칭형 또는 비대칭형 연접을 형성하였다. 한편 축삭돌기-축삭돌기 연접에서는 연접후 유축사돌기 (axon-like processes)가 GABA-양성이었다. 이와 같은 관찰은 개의 교핵에 존재하는 억제성 개재신경원이 여러 수입계로부터의 정보를 통합하고, 이를 소뇌피질이나 소뇌핵에 전달함으로써, 대뇌-교핵-소뇌계의 신경경로에서 조절기능을 담당함을 뒷받침하는 것이다.

• Archives of Pharmacal Research
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• 제24권2호
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• pp.164-170
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• 2001

Glutamate receptors-mediated excitoxicity is believed to play a role in the pathophysiology of neurodegenerative diseases. The present study was performed to evaluate the inhibitory effect of fanschinoline, a bis-benzylisoquinoline alkaloid, which has a characteristic as a $Ca^{2+}$channel blockers on excitatory amino acids (EAAS)-induced neurotoxicity in cultured rat cerebellar granule neuron. Fangchinoline (1 and 5$\mu\textrm{m}$) inhibited glutamate (1 ${m}M$), N-methyl-D-aspartate (NMDA; 1 ${m}M$) and kainate (100$\mu\textrm{m}$)-induced neuronal cell death which was measured by trypan blue exclusion test. Fangchinoline (1 and 5$\mu\textrm{m}$) inhibited glutamate release into medium induced by NMDA (1 ${m}M$) and kainate (100$\mu\textrm{m}$), which was measured by HPLC. And fangchinoline (5$\mu\textrm{m}$) inhibited glutamate (1 ${m}M$)-induced elevation of intracellular calcium concentration. These results suggest that inhibition of $Ca^{2+}$influx by fangchinoline may contribute to the beneficial effects on neurodegenerative effect of glutamate in pathophysiological conditions.

• Archives of Pharmacal Research
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• 제18권6호
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• pp.391-395
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• 1995

Several lines of evidence indicate that physiological activity of N-methyl-D-aspartate (NMDA) receptor was blocked by physiological concentration of $Mg^{2+}$ (1.2 mM). However, the activity of NMDA receptor may not be blocked totally with this concentration of $Mg^{2+}$ under elevated membrane potential by kainate. Here, we described the effect of $Mg^{2+}$ on NMDA receptor and how much of NMDA receptor functions could be activated by kainate. Effects of NMDA receptor antagonist on kainate-induced elevation of intracellualr $Ca^{2+}$ levels $([Ca^{2+}]_i)$ and extracellular glutamate level were examined in cultured rat cerebellar granule neurons. kainate-induced elevation of $([Ca^{2+}]_i)$ was not affected by physiological concentration of $Mg^{2+}$. Kainate-induced NMDA-induced elevation was blocked by the same concentration of $MG^{2+}$Kainate-induced elevation of [$([Ca^{2+}]_i)$ was decreased by 32% in the presence of NMDA antagonists, MK-801 and CPP (3-[2-carboxypiperazine-4-yl]propyl-1-phosphonic acid), in $Mg^{2+}$ free buffer. Kainate receptor-activated gluamate release was also decreased (30%) by MK-801 or CPP. These resuts show that certain extent of elevations of intracellular $Ca^{2+}$ and extracellular glutamate by kainate is due to coativation of NMDA receptors.

• Journal of Veterinary Science
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• 제23권2호
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• pp.30.1-30.6
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• 2022

This report aims to describe the first case of muscular and collagenous choristoma in a dog. A 10-yr-old female mixed-breed dog presented with lateral recumbence, vocalization, positional vertical nystagmus, divergent strabismus, anisocoria, and status epilepticus. The clinical condition evolved to stupor and ultimately, death. Necropsy revealed a white mass causing an irregular increase in the volume of the cerebellar vermis. In histological analysis, a well circumscribed, unencapsulated mass was observed in the cerebellum, consisting of fibers of striated skeletal muscle and collagen fibers, mostly mineralized. Based on the histopathological and histochemical findings, a diagnosis of muscular and collagenous cerebellar choristoma was made.

• 대한한방소아과학회지
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• 제19권2호
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• pp.41-50
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• 2005

저자는 Brain MRI 상 Cerebellar atrophy로 인한 척수소뇌성 운동실조증으로 진단받은 6세 환아의 Ataxia, Dysarthria, 두부진전증(頭部振顫症), 안진(眼振) 등에 대해 한방적 치료 후 호전도가 있었기에 이에 증례보고(證例報告)하는 바이다. 특히 두진(頭振), 안진(眼振)과 같은 진전(振顫)질환과 실조증에 대하여 두침(頭鍼)시술이 유효성이 컸으며, 오지(五遲) 오연증(五軟證)에 대하여서 간(肝), 신정격(腎正格)과 육미지황탕(六味地黃湯)의 장기 투여가 효과가 있었다. 일반적인 SCA, ADCA가 청, 장년기 이후에 발생하고 유전적인 경향이 큰 것에 반해 재태(在胎)시 큰 이상없이 생후 특발적으로 발생한 척수 소뇌성 운동실조에 대하여서는 한방적으로 증례보고(證例報告) 된 바가 드문 실정으로 유, 소아의 이러한 질환에 대한 진일보된 연구과 함께 평가척도나 치료방법적인 면에서의 고찰(考察)이 더욱 필요하리라 사료된다.

• 한국동물학회:뉴스레터
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• 제12권2호
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• pp.93.1-93
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• 1995

No Abstract, See Full Text

• 대한약리학회:학술대회논문집
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• 대한약리학회 2006년도 The 6th Congress of the Federation of Asian and Oceanian Physiological Societies
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• pp.98.2-98.2
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• 2006