Results Span ,height ,external diameter and arcus of three bony semicircular canals was seperately:anterior semicircula果 骨半规管的跨度、高度、外径和弧长分别为 :前 (上 )半规管 7.8± .8mm、 . ± .8mm、 .8± 0 . mm、 .87± . 8mm ;