论文部分内容阅读
早期前庭功能障碍的诊断具有重要意义。诊断困难在于因中枢的代偿作用,使前庭不对称引致的眩晕有时不明显。如采用致敏措施则可使症状显现。作者采用过度换气方法激发眼震。过度换气后,通过低碳酸血症反射性引起小动脉痉挛,导致脑缺氧,从而改变神经动力的活性,影响前庭的兴奋性。过度换气与改变头位相结合,可增加眼震出现频度及其强度。方法如下。放置电极于外眼角,以记录水平
The diagnosis of early vestibular dysfunction is of great significance. Difficult diagnosis is due to central compensatory effect, so that caused by asymmetric vestibular dizziness is sometimes not obvious. If using sensitization measures can make the symptoms appear. The author uses hyperventilation to stimulate nystagmus. Hyperventilation, caused by hypocapnia reflex arterioles spasm, leading to cerebral hypoxia, thereby changing the activity of nerve power, affecting the vestibular excitability. Hyperventilation combined with changing head position can increase the frequency of nystagmus and its intensity. Methods as below. Place the electrode on the outer corner of the eye to record the level