Two hundred and eight copies ENG recorded during Barany’s test with 20℃water irrigation method were selected for power spectrum analysis. Their diagnosis were determined or confirmed by operation and pathological ex...Two hundred and eight copies ENG recorded during Barany’s test with 20℃water irrigation method were selected for power spectrum analysis. Their diagnosis were determined or confirmed by operation and pathological examination ahead. The results indicated that: in normal cases, the maximum amplitude frequency (Famax) should be over 1 Hz; the difference of Famax between two ears should be less than 1 Hz; the spectrum histogram should display as form "∧" ; the frequency components should be abundant and mostly distributed within 8 Hz as well. If the Famax was less than 0.5Hz, the difference of Famax was over 1 Hz, the histogram showed as "L" form, the frequency components decreased significantly or even disappeared, a function reduce or loss of inner ear or Ⅷnerve would be suggested.展开更多
文摘Two hundred and eight copies ENG recorded during Barany’s test with 20℃water irrigation method were selected for power spectrum analysis. Their diagnosis were determined or confirmed by operation and pathological examination ahead. The results indicated that: in normal cases, the maximum amplitude frequency (Famax) should be over 1 Hz; the difference of Famax between two ears should be less than 1 Hz; the spectrum histogram should display as form "∧" ; the frequency components should be abundant and mostly distributed within 8 Hz as well. If the Famax was less than 0.5Hz, the difference of Famax was over 1 Hz, the histogram showed as "L" form, the frequency components decreased significantly or even disappeared, a function reduce or loss of inner ear or Ⅷnerve would be suggested.
