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mastoid foramen
相关语句
  乳突孔
    60.5% of mastoid foramen locate on the anterior superior quadrant of the "window",while 30.2% on the posterior superior quadrant and 9.3% on the posterior inferior quadrant.
    将骨窗分为四个象限,其中乳突孔在前上、后上、后下象限分别为60.5%、30.2%和9.3%。
短句来源
    Applied anatomy of the location of bony "window" and mastoid foramen through retrosigmoid approach
    乙状窦后进路骨窗和乳突孔定位的解剖学研究
短句来源
    To provide anatomical basis for the location of bony "window" and mastoid foramen through retrosigmoid approach for clinical operation.
    目的:对乙状窦后手术进路的骨窗和乳突孔进行定位,为临床手术操作提供应用解剖基础。
短句来源
    Methods: The location of bony "window" and mastoid foramen were studied , and the distance from bony "window" to cerebellopontine angle was measured on 18 dry and 12 wet cranial bones.
    方法:采用干性颅骨18具,福尔马林固定的头颅标本12具分别进行骨窗及乳突孔的定位测量和桥小脑角结构距骨窗的距离测定。
短句来源
  乳突孔
    60.5% of mastoid foramen locate on the anterior superior quadrant of the "window",while 30.2% on the posterior superior quadrant and 9.3% on the posterior inferior quadrant.
    将骨窗分为四个象限,其中乳突孔在前上、后上、后下象限分别为60.5%、30.2%和9.3%。
短句来源
    Applied anatomy of the location of bony "window" and mastoid foramen through retrosigmoid approach
    乙状窦后进路骨窗和乳突孔定位的解剖学研究
短句来源
    To provide anatomical basis for the location of bony "window" and mastoid foramen through retrosigmoid approach for clinical operation.
    目的:对乙状窦后手术进路的骨窗和乳突孔进行定位,为临床手术操作提供应用解剖基础。
短句来源
    Methods: The location of bony "window" and mastoid foramen were studied , and the distance from bony "window" to cerebellopontine angle was measured on 18 dry and 12 wet cranial bones.
    方法:采用干性颅骨18具,福尔马林固定的头颅标本12具分别进行骨窗及乳突孔的定位测量和桥小脑角结构距骨窗的距离测定。
短句来源
  “mastoid foramen”译为未确定词的双语例句
    Conclusion: Because the method of locating bony "window" and mastoid foramen through retrosigmoid approach is simple,practical and convenient, it is feasible to apply on simulate operation.
    结论:作者设计的骨窗和乳突定位方法简捷、实用、方便,在模拟手术中可行性好。
短句来源
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The systematic position of Eurymylidae(Anagalida)has been an important subjectin the discussion of the origin of the Rodentia since the most primitive genus of thisfamily,Heomys,was reported(Li,1977).The discovery of the new genus,Rhombomy-lus.from the Early Eocene of the Turpan basin.Xinjiang(Zhai,1978),and of the Jun-xian,Hubei(Li,1983),provides insights to factors involved into the relationshipsbetween Eurymylidae and Rodentia.After a preliminary report on the cranial morphology and dentition of the newlydiscovered...

The systematic position of Eurymylidae(Anagalida)has been an important subjectin the discussion of the origin of the Rodentia since the most primitive genus of thisfamily,Heomys,was reported(Li,1977).The discovery of the new genus,Rhombomy-lus.from the Early Eocene of the Turpan basin.Xinjiang(Zhai,1978),and of the Jun-xian,Hubei(Li,1983),provides insights to factors involved into the relationshipsbetween Eurymylidae and Rodentia.After a preliminary report on the cranial morphology and dentition of the newlydiscovered materials,including about 20 complete skulls and 150 jaws,of Rhombomylusfrom Hubei,the purpose of this paper is to describe the basic structure of the earregion and to call attention to some similarities of the ear structure between theRhombomylus and Rodentia.It is hoped that understanding more cranial charactersmight contribute to better discussing of the systematics of Eurymylidae.The ear region of Rhombomylus differs markedly from many of other mammalsin the inflation of the mastoid process.Normally,the mastoid in mammals appears onlyon the occipital or ventral surface and never goes to the dorsal surface of the skull.In Rhombomylus,it extends not only on the occipital and ventral surface,but also onthe dorsal surface(Pl.I,figs.1,2,3).It inflates in the shape of cube on the cranialwall of the skull(Pl.II,fig.1b),in front of which the tentorium of cerebellum waslocated.A number of septa fill in the mastoid process(Pl.I,fig.4).The inner ear of Rhombomylus resembles to some rodents in the shape and the struc-ture of the cochlea and the semicircular canals.The width of the cochlea is about 4 mmon the base and 1.5 mm on the apex.The height from the base to the apex is about4 mm.The cochlea may have two and half turns.The anterior,posterior and lateralsemicircular canals are 9 mm,8.5 mm and 7 mm in length respectively.The commonbony limb is about 2 mm long.The simple bony limb enters into the utricle supero-anteriorly to the posterior bony ampulla,which is different from that in some lago-morphs.The anterior and lateral bony ampullae locate at the upper side of the ves-tibular window and the posterior ampulla locates at the latero-ventral side of the co-chlea window(Pl.II,fig.3).The subarcuate fossa and internal acoustic meatus seenin V 5263 are two round foramina.The middle ear of Rhombomylus resembles to jump-mice,sand-rat etc.in someaspects.The tympanic cavum is large.The bulla is composed of the ectotympanic and mastoid,which differs from that of anagalids(as Anagale gobiensis)and is similarto that of jump-mice.The epitympanic recess is about 3.5 mm in width.The sulcusof promontorium is deep and narrow(Pl.II,fig.1a).The vestibular window is 2 mmlong,1 mm wide and situates obliquely above the sulcus of promontorium.The stape-dial artery foramen is small and superior to the vestibular window.The cochlea windowis at the posterior end of the cochlea.The auditory ossicles were preserved in somespecimens.The round-shaped head of the malleus is 1.1 mm in diameter and the handleis 3 mm long.The neck of the stapes is about 0.7 mm and the stapedial ratio is 2.The outer ear.The external acoustic meatus is about 6 mm long and openedlatero-posteriorly.The following is the topographic list of the foramina and structure around earregion:1.Carotid canal,at the anterior end of the bulla,fissureshaped.2.Canal of Huguier,a minute foramen in the lateral surface of the bulla,nearby the root of the external acoustic meatus.3.Eustachian canal,dorsal to the anteromedial portion of the tympanic bulla.4.The bulla.5.The external acoustic meatus.6.Stylomastoid foramen,between the external acoustic meatus and the mastoidprocess,near by the posterior edge of the external acoustic meatus.7a.Stapedial canal,a tiny foramen,at the anterior end of the commen aperturewith which the jugular foramen shared.7b.Stapedial foramen,a small round foremen,superior to the vestibular window.8.The mastoid process.9.Jugular foramen,a semilunar-shaped foramen.between the basioccipital andthe posterior end of the bulla.10.The paracondyloid process.11.Hypoglossal foramen,anterior to the condyle,subdivided into two small fora-mina in some specimen.12.The condyle.13.The cochlear spiral canal.14.The septae of the mastoid process.15.The cochlea.16.The epitympanic recess.17.The vestibular(oval)window.18.The cochlear(round)window.19.The squamosal.20.The parietal.21.Temporal foramina,three in the number,situated in the squamoso-parietalsuture and posterodorsal to the root of zygomatic arch.22.Squamoso-mastoid foramen,on the occipital surface between the squamosal andthe mastoid.23.The foramen for a small vein.24.The subarcuate fossa.25.The semicircular canals. 26.The basisphenoid.27.The incus.28.The malleus.29.The stapes.30.The postglenoid foramen.

本文详细描述了菱臼齿兽耳区各个部分的基本结构;并指出了耳区结构与某些啮齿类的相似性,以及中耳鼓泡组成成份与戈壁(犭亚)兽(Anagale gobiensis)的区别。

Wild horse is one of the most valuable wild animal in the world. The skull of a female adult wild horse was studied. Foteen paramaters was meassured, six indexes was caculated with these 14 parameters and made a comparistion between the wild horse and the domestic horses. The results indicate that (1) the length ratio of the head/ body of wild horse is higher than that of the domestic horses. (2) The cranial region of wild horse is medium among the equus and the longer skull of the wild horse is due to the longer...

Wild horse is one of the most valuable wild animal in the world. The skull of a female adult wild horse was studied. Foteen paramaters was meassured, six indexes was caculated with these 14 parameters and made a comparistion between the wild horse and the domestic horses. The results indicate that (1) the length ratio of the head/ body of wild horse is higher than that of the domestic horses. (2) The cranial region of wild horse is medium among the equus and the longer skull of the wild horse is due to the longer facial region of it. (3) There is not stylo-mastoid foramen between, mastoid process and hyoid process on the petrous temporal bone. So the facial nerve is emerged from petroty mpanic fissute with chorda tympani.

野马属世界上最珍贵动物之一。本文对新疆野马繁殖中心因心脏病死亡的908号母马头骨进行了观察测量,并与家马头骨进行了比较,发现野马头长与体长之比大于家马头长与体长之比,野马脑区体积在马属动物中仅属中等程度,但脸区却明显大于家马。野马下颌骨较家马的粗大,翼肌窝较家马的深,上、下臼齿列也明显比家马长。以上特点和野马的野生习性相适应。另外908号野马在神经出入颅腔的孔道上与家马差异大,908号野马岩颞骨乳突部下方与鼓室间无茎乳突孔,面神经是和鼓索神经一起自岩鼓裂出颅腔。

To provide anatomical basis for the location of bony "window" and mastoid foramen through retrosigmoid approach for clinical operation. Methods: The location of bony "window" and mastoid foramen were studied , and the distance from bony "window" to cerebellopontine angle was measured on 18 dry and 12 wet cranial bones. Results:The bony "window" is a circle with a radius of 1 .35 cm,whose center located behind the lower pole external ear canal with a horizontal distance of 4.35cm. 60.5% of mastoid...

To provide anatomical basis for the location of bony "window" and mastoid foramen through retrosigmoid approach for clinical operation. Methods: The location of bony "window" and mastoid foramen were studied , and the distance from bony "window" to cerebellopontine angle was measured on 18 dry and 12 wet cranial bones. Results:The bony "window" is a circle with a radius of 1 .35 cm,whose center located behind the lower pole external ear canal with a horizontal distance of 4.35cm. 60.5% of mastoid foramen locate on the anterior superior quadrant of the "window",while 30.2% on the posterior superior quadrant and 9.3% on the posterior inferior quadrant. Conclusion: Because the method of locating bony "window" and mastoid foramen through retrosigmoid approach is simple,practical and convenient, it is feasible to apply on simulate operation.

目的:对乙状窦后手术进路的骨窗和乳突孔进行定位,为临床手术操作提供应用解剖基础。方法:采用干性颅骨18具,福尔马林固定的头颅标本12具分别进行骨窗及乳突孔的定位测量和桥小脑角结构距骨窗的距离测定。结果:经外耳道下极水平向后4.35 cm定位圆心“O”点,以 1.35 cm为半径所画的圆即为骨窗的位置。将骨窗分为四个象限,其中乳突孔在前上、后上、后下象限分别为60.5%、30.2%和9.3%。结论:作者设计的骨窗和乳突定位方法简捷、实用、方便,在模拟手术中可行性好。

 
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