• 제목/요약/키워드: axonal loss

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Multifocal Motor Neuropathy (다초점성 운동신경병증)

  • Lee, Dong-Kuck
    • Annals of Clinical Neurophysiology
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    • v.4 no.2
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    • pp.98-107
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    • 2002
  • Multifocal motor neuropathy (MMN) is a chronic immune-mediated peripheral myelinopathy. The major clinical features include slowly progressive, painless, and asymmetric weakness, usually of distal limb muscle. Early in the course of the disease, weakness is not necessarily associated with muscle atrophy, owing to the initial primary involvement of peripheral myelin. Chronic progressive weakness is often associated with some degree of concurrent axonal loss and subsequent muscle atrophy. Sensory symptoms are usually mild or absent, and involvement of cranial and respiratory muscles is rare. The findings of multifocal motor conduction block, abnormal temporal dispersion, and focal conduction slowing at segments not at risk for common entrapment or compression injury, associated with normal sensory conduction studies along the same segments, are the hallmark electrophysiologic features of MMN. The slow progression and absence of upper motor neuron signs are the major clinical points that separate MMN from amyotrophic lateral sclerosis. The role of GM1 antibodies, found in high titers in 22~84% of MMN patients, remains uncertain. The contention that MMN is an autoimmune disorder is largely based on the often dramatic improvement in symptoms following the administration of intravenuos immunoglobulin or cyclophosphamide.

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Early Surgical Treatment of Pronator Teres Syndrome

  • Lee, Ho Jin;Kim, Ilsup;Hong, Jae Taek;Kim, Moon Suk
    • Journal of Korean Neurosurgical Society
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    • v.55 no.5
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    • pp.296-299
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    • 2014
  • We report a rare case of pronator teres syndrome in a young female patient. She reported that her right hand grip had weakened and development of tingling sensation in the first-third fingers two months previous. Thenar muscle atrophy was prominent, and hypoesthesia was also examined on median nerve territory. The pronation test and Tinel sign on the proximal forearm were positive. Severe pinch grip power weakness and production of a weak "OK" sign were also noted. Routine electromyography and nerve conduction velocity showed incomplete median neuropathy above the elbow level with severe axonal loss. Surgical treatment was performed because spontaneous recovery was not seen one month later.

The Emerging Role of Fast MR Techniques in Traumatic Brain Injury

  • Yoo, Roh-Eul;Choi, Seung Hong
    • Investigative Magnetic Resonance Imaging
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    • v.25 no.2
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    • pp.76-80
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    • 2021
  • Post-concussion syndrome (PCS) following mild traumatic brain injury (mTBI) is a major factor that contributes to the increased socioeconomic burden caused by TBI. Myelin loss has been implicated in the development of PCS following mTBI. Diffusion tensor imaging (DTI), a traditional imaging modality for the evaluation of axonal and myelin integrity in mTBI, has intrinsic limitations, including its lack of specificity and its time-consuming and labor-intensive post-processing analysis. More recently, various fast MR techniques based on multicomponent relaxometry (MCR), including QRAPMASTER, mcDESPOT, and MDME sequences, have been developed. These MCR-based sequences can provide myelin water fraction/myelin volume fraction, a quantitative parameter more specific to myelin, which might serve as a surrogate marker of myelin volume, in a clinically feasible time. In this review, we summarize the clinical application of the MCR-based fast MR techniques in mTBI patients.

A Case Report of Integrative Medicine Therapy about Patient Suspected Acute Guillain-Barre Syndrome (급성 Guiilain-Barre Syndrome 추정 환자 동서협진 치험 1례)

  • So, Hyung-Jin;Son, Yoon-Jung;Lee, Beom-Joon;Rho, Byoung-Wan;Lew, Jae-Hwan;Heo, Hong
    • The Journal of Korean Oriental Chronic Disease
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    • v.10 no.1
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    • pp.53-61
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    • 2005
  • Guillain-Barre syndrome (GBS) is a group of autoimmune syndromes consisting of demyelinating and acute axonal degenerating forms of the disease. Typically, Gullain-Barre syndrome can be diagnosed from the patient's symptoms and physical examination such as the rapid onset of weakness, paralysis and loss of reflexes. In most patients, resolution is complete or near complete. Treatment consists of supportive care, ventilatory management (in about one third of patients), and specific therapy with intravenous immunoglobulin or plasmapheresis. This clinical report is about suspected acute severe Guillain-Barre syndrome patient, 61-year-old man had quadriplegia, facial palsy, dysphasia, respiratory failure. After 5 weeks of East-West integrative medicine therapy - Conventional Conservative therapy(plasmaphresis and intravenous immunoglobulin) and Korean traditional medicine(Sasang medicine and acupuncture treatment) - most symptoms improved.

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Neuroprotective Effects of 6-Shogaol and Its Metabolite, 6-Paradol, in a Mouse Model of Multiple Sclerosis

  • Sapkota, Arjun;Park, Se Jin;Choi, Ji Woong
    • Biomolecules & Therapeutics
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    • v.27 no.2
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    • pp.152-159
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    • 2019
  • Multiple sclerosis (MS) is an autoimmune disease characterized by progressive neuronal loss, neuroinflammation, axonal degeneration, and demyelination. Previous studies have reported that 6-shogaol, a major constituent of ginger (Zingiber officinale rhizome), and its biological metabolite, 6-paradol, have anti-inflammatory and anti-oxidative properties in the central nervous system (CNS). In the present study, we investigated whether 6-shogaol and 6-paradol could ameliorate against experimental autoimmune encephalomyelitis (EAE), a mouse model of MS elicited by myelin oligodendrocyte glycoprotein ($MOG_{35-55}$) peptide immunization with injection of pertussis toxin. Once-daily administration of 6-shogaol and 6-paradol (5 mg/kg/day, p.o.) to symptomatic EAE mice significantly alleviated clinical signs of the disease along with remyelination and reduced cell accumulation in the white matter of spinal cord. Administration of 6-shogaol and 6-paradol into EAE mice markedly reduced astrogliosis and microglial activation as key features of immune responses inside the CNS. Furthermore, administration of these two molecules significantly suppressed expression level of tumor necrosis $factor-{\alpha}$, a major proinflammatory cytokine, in EAE spinal cord. Collectively, these results demonstrate therapeutic efficacy of 6-shogaol or 6-paradol for EAE by reducing neuroinflammatory responses, further indicating the therapeutic potential of these two active ingredients of ginger for MS.

Increase of Synapsin I, Phosphosynapsin (ser-9), and GAP-43 in the Rat Hippocampus after Middle Cerebral Artery Occlusion

  • Jung, Yeon-Joo;Huh, Pil-Woo;Park, Su-Jin;Park, Jung-Sun;Lee, Kyung-Eun
    • The Korean Journal of Physiology and Pharmacology
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    • v.8 no.2
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    • pp.77-81
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    • 2004
  • The loss of neurons and synaptic contacts following cerebral ischemia may lead to a synaptic plastic modification, which may contribute to the functional recovery after a brain lesion. Using synapsin I and GAP-43 as markers, we investigated the neuronal cell death and the synaptic plastic modification in the rat hippocampus of a middle cerebral artery occlusion (MCAO) model. Cresyl violet staining revealed that neuronal cell damage occurred after 2 h of MCAO, which progressed during reperfusion for 2 weeks. The immunoreactivity of synapsin I and GAP-43 was increased in the stratum lucidum in the CA3 subfield as well as in the inner and outer molecular layers of dentate gyrus in the hippocampus at reperfusion for 2 weeks. The immunoreactivity of phosphosynapsin was increased in the stratum lucidum in the CA3 subfield during reperfusion for 1 week. Our data suggest that the increase in the synapsin I and GAP-43 immunoreactivity probably mediates either the functional adaptation of the neurons through reactive synaptogenesis from the pre-existing presynaptic nerve terminals or the structural remodeling of their axonal connections in the areas with ischemic loss of target cells. Furthermore, phosphosynapsin may play some role in the synaptic plastic adaptations before or during reactive synaptogenesis after the MCAO.

A case report of Guillain-Barre syndrome (Guiillain-Barre 증후군 환자의 치험 1례)

  • Kim, Ki-Hoon;Shin, Dong-Gil;Lee, Jin-Yong;Cho, Baek-Gun
    • The Journal of Pediatrics of Korean Medicine
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    • v.17 no.2
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    • pp.199-211
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    • 2003
  • Objective : This is clinical report about the Wei syndrome(?證)-patient diagnosed as Guillian-Barre syndrome. Guillain-Barre syndrome(GBS), what is called acute inflammatory polyneuritis, is a disorder in which the body's immune system attacks parts of peripheral nervous system. GBS is subclassified into acute inflammatory demyelinating polyneuropathy(AIDP), acute motor or motor-sensory axonal neuropathy(AMAN, AMSAN), and the other variants. The cause and mechanism of this syndrome are unknown yet. The typical Guillain-Barre syndrome could be diagnosed by the patient's syndroms and physical exams as the rapid onset of weakness, paralysis and loss of reflexes. The analysis of CSF and electrical test of nerve and muscle function can be performed to confirm the diagnosis. Most of the cases usually occur shortly after a viral infection. Method & Result : This is the clinical report about the one patient daignosed as Guillain-Barre syndrome. The patient, 9-year-old girl had the hemiparesis after upper respiratory infection. We characterized her as Wei syndrom(?證). The patient was treated by acupunture, indirect moxibustion, herb medication(通竅湯 加味方, 四物湯合檳蘇散 加味方) and had significant improvement in the Wei syndrome(?證). Conclusion : We report that we had good effects of oriental medical treatment on Guillain-Barre syndrome.

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