电生理检查（Electrophysiological examination）.docVIP

电生理检查（Electrophysiological examination） Electrophysiological examination ? One, electroencephalogram (electroencephalogram) electroencephalogram (EEG) examination: it is in the head, put 8-16 electrodes according to a certain place, by electroencephalogram machine, the graph of the biological electricity activity of cerebral cell is amplified and the graph that is written on paper continuously. Under normal circumstances, the EEG has a certain regularity, especially when the brain cortex lesions, regularity of damage, the waveform is changed, the waveform analysis can assist the clinical diagnosis and brain diseases. ? According to the frequency of EEG delta wave is divided into: (1-3c/s) Bo (4-7c/s), Bo (8-13c/s), beta gamma (14-25c/s) wave (more than 25c/s), Delta and theta waves called slow wave, beta and gamma waves called fast wave. According to the different age of the basic wave frequency is different, such as the children under the age of 3 in delta wave, 3-6 years to theta waves, with the increase of age, alpha wave gradually increased to adults with alpha waves, but no strict clear boundaries between the age, such as some 4 children at the age of 5, occipital alpha the wave is very obvious. When the normal adults are awake, quiet and close their eyes, the basic rhythm of brain waves is mainly the occipital alpha wave, while the other part is dominated by a small amount of slow wave between alpha waves. To determine whether the brain waves are normal or not, the frequency, amplitude, symmetry of both sides of the brain, the number and location of the slow wave, the appearance of the slow wave and the presence of pathological waves are analyzed mainly according to their age. Many brain lesions can cause abnormal brain waves. Such as intracranial lesions (especially cortical parts) can be localised slow wave; sporadic encephalitis, most EEG showed diffuse high amplitude slow wave; in addition, such as cerebrovascular disease, trauma, inflammation, metabolic e