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所谓温度眼震,是指把比体温低或高的水注入外耳道所诱发的眼震。依靠眼震强度进行的外半规管的功能检查,叫作温度眼震检查。一、原理当把比体温低或高的水注入外耳道时,外半规管受到冷或热作用,其内部的淋巴流动,刺激壶腹部的内感受器而发生眼震。在外半规管,流向壶腹的淋巴使外半规管壶腹部神经的活动电流增大,远离壶腹部的内淋巴使活动电流减少。向仰卧头前屈30°位注入冷水时,可看到向对侧的眼震,注入温水时则与此相反。因外半规管向前与水平面成30°,故在检查时,应采取仰卧位头前屈30°,或坐位头后仰60°。
The so-called temperature nystagmus, refers to the body temperature lower or higher water into the external auditory meatus induced nystagmus. The function of the outer semicircular canal, which depends on the nystagmus, is called temperature nystagmus. First, the principle When lower than the body temperature or high water into the external auditory meatus, the outer semicircular canal by the role of cold or heat, the internal lymphatic flow, stimulation of the inner ampulla of receptors and nystagmus occurs. Outside the semicircular canal, the lymphatic flow to the ampulla increased the activity current of the ampulla of the outer semicircular canal, and the activity current was reduced away from the endolymph of the ampulla. To the 30 ° lateral flexion position into the cold water, you can see to the opposite side of the nystagmus, while injecting warm water is the opposite. Due to the outer semicircular canal forward and the horizontal plane into 30 °, so in the inspection, should be taken supine position 30 ° flexion or seat back 60 °.