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Wysłany: Pon 20:38, 21 Mar 2011
Temat postu: herve leger skirts jba tdm krlf vbh
EEG analysis of patients with sparse white matter
And so on. LA mostly occurs in hypertension, cerebrovascular disease patients, normal aging can also be seen. Reported in the literature,
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, obtained through a large number of autopsy analysis of the main changes in LA is a diffuse white matter demyelination, or limited, gliosis. The most important in the pathogenesis of this disease is ischemic brain injury. At present, most scholars believe that the deep white matter dominate the deep brain perforating branch artery terminal artery, rarely no collateral circulation, it is susceptible to white matter ischemia. Because of age, hypertension and other risk factors for vascular disease caused by a small artery in the brain structural changes, this change eventually led to the automatic adjustment mechanism of cerebral blood flow changes, the occurrence of white matter abnormalities. Brown and other studies of apoptosis in patients with LA was found in the white matter area showed DNA break sparse number of cells adjacent to the white matter is 2.5 times that of adjacent cortex 25 times that of apoptosis, especially oligodendrocyte apoptosis is also and the pathogenesis of LA. EEG to determine brain function is sensitive to physiological state, it can directly reflect changes in brain function, in LA early, make a diagnosis by CT may not have the appropriate clinical presentation, EEG also sensitive to capture the pathology of brain cells physiological changes,
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, abnormal. LA EEG abnormalities in this group of patients was 61.3%, compared with the control group (6.9%) was significantly higher (P <0.01). LA than one type Ⅱ Ⅲ type, I-LA, the proportion of severe abnormal increase in the severity of the lesion with the LA unusual degree of increase in the EEG. LA prompted greater the number of lesions, the greater the range of lesions, EEG abnormalities more obvious, more consistent with the CT severity. This observation showed that abnormal EEG features of LA group as a major power reduction,
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, a slow rhythm and slow to appear. a brain wave rhythm means active work status, awareness of its activities with a higher level, more stable emotions, and a strong drive their own capacity for effective thinking activities related to J. And a wave of low frequency, low amplitude, low index,
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, a more suggestive of wave generalization of cognitive and emotional changes. This article also found abnormal EEG in order to diffuse or diffuse increase in slow wave of a high amplitude or shape of irregular wave 6 0 wave dominant common, and IA lesions distributed more in the periventricular, more diffuse lesions, affect the electrical activity of cortical conduction. Slow the emergence of physiological dysfunction of neurons reflected in the electroencephalogram. Slow wave frequency,
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, the slower, more appears, the greater the degree of abnormalities. Easily combined with the LA in patients with cognitive and intellectual impairment in line. In summary, LA in patients with abnormal EEG higher rate than the normal population, indicating that the diagnosis of IA will certainly help, but no characteristic changes in EEG waveforms. EEG and CT can complement each other and contribute to the sparse white matter to judge the severity of disease. Although there were no patients with clinical symptoms, EEG abnormalities should prompt active intervention. [Key words] brain disease from the sparse nature; EEG [CLC] R741.044 [Document code] B [Article ID] 1006-9674 (2009) 06-0616-02 [
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