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A wave of electrical activity of the brain that is recorded on the surface of the skin " Human tissue cells are always in a spontaneous way to produce a very weak biological activity. Using electrodes placed on the scalp to guide the electrical activity of the brain cells and amplified by the EEG after recording in a special paper, that is, a certain waveform, amplitude, frequency and phase of the graphics, curve, that is, eeg. When the pathological or functional changes of brain tissue occur, this curve is changed, which provides the basis for clinical diagnosis and treatment. The so-called CT scan, is the electronic computer axis of the scan. Its basic principle is to use the skull to "X-ray" absorption rate of different imaging. The density of bone, brain tissue and cerebrospinal fluid in the brain is different, and the absorption of X-ray is different. According to this difference, the X wire harness from multiple directions, along the head of a selected fault level, measured by the amount of X-ray, after the calculation of the level of each unit volume of the absorption coefficient, and then reconstruct the image of an imaging technology. The body rotation is feeling dizziness, head heavy feeling dizzy Q. What kind of auxiliary examination should be done by the Department of neurology or the Department of ENT.