摘要
目的 为了确定终生在地下生活的斯氏鼢鼠(Myospalaxsmithi)和棕色田鼠(Microtusman darinus)中耳内的听觉传导是否通过特殊结构来实现震动通讯。方法 在解剖显微镜下观察斯氏鼢鼠、棕色田鼠的中耳结构,利用公式ITR=[A/[2/3(Ad)]]×[Li/Lm]2和公式T=[4(Zd/41.5)]/[1+Zd/41.5]计算它们中耳的声波转换效率,观察头骨与下颌骨之间的连接方式,并与地上生活的大鼠、家猫和猕猴的中耳进行比较。结果 斯氏鼢与棕色田鼠中耳内不存在特殊的声波传导结构,曾被认为与震动通讯有关的假关节窝的功能是用来防止下颌脱臼,砧骨短脚与鼓室壁间的连接关系同样见于大鼠、家猫和猕猴中斯氏鼢鼠的中耳对声波的转换效率低于棕色田鼠。结论 斯氏鼢鼠和棕色田鼠的震动通讯不需要特殊的中耳传导装置,借助于头骨的一般结构就能完成。
AimIn order to determine if there are some special structures for the transmission of seismic communication in Smithi′s zoker (Myospalax smithi) and Mandarin vole (Microtus mandarinus).Methods Study the structure of the middle ears in both species under dissecting microscope;fractions of acoustical energy theoretically transmitted to the cochlea were calculated by the formulae ITR=A/]×~2 and T=/.Results No special structures for seismic communication it was found in the subterranean rodents Smithi′s zoker and Mandarin vole;the ratio of sound transmission is lower in Smithi′s zoker than in Mandarin vole.Conclusion The seismic communication doesn′t rely on special structures.It can be completed with the normal skull structure.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第1期73-76,共4页
Journal of Northwest University（Natural Science Edition）
基金
教育部骨干教师科研基金资助项目(200065)
关键词
斯氏鼢鼠
棕色田鼠
中耳
震动通讯
转换效率
传导装置
Smithi′s zoker (Myospalax smithi)
Mandarin vole (Microtus mandarinus)
middle ear
seismic communication
transformation efficiency
transmission apparatus
