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蛛网膜不仅是手术过程中的自然标志和工作平面,也是许多病变发展的界限和边界。很多神经外科手术可以通过蛛网膜下池(subarachnoidcisterns)提供的自然通道进行无创性操作。
外蛛网膜包绕着脑和脊髓,内蛛网膜其实就是蛛网膜小梁或间隔,将蛛网膜下腔分隔成很多的脑池,同时蛛网膜还参与构成蛛网膜下腔段颅神经和颅内血管的包膜。
结合文献学习一下蛛网膜,对显微手术操作大有益处。
1、蛛网膜的命名和分类(Nomenclatureandclassification)
(1)蛛网膜至今还没有统一的命名(nomenclature)和分类(classification)。
(2)颅内蛛网膜根据部位(accordingtothesites)来分:
(3)Kurucz等人将颅内蛛网膜(intracranialarachnoidmembranes)分为5组:
(4)外和内蛛网膜(outerandinnerarachnoidmembranes)
2、内蛛网膜(Innerarachnoidmembranes)
(1)根据内蛛网膜与Liliequist膜间脑叶的关系将其分为2组:
Table1TheinnerarachnoidmembranesanteriortothediencephalicleafofLiliequist’smembrane【Lilieguist膜间脑叶之前的内蛛网膜】
InnerArachnoidMembrane内蛛网膜
olfactorymembrane
separatingthecarotidsisternfromtheolfactory将嗅池与颈动脉池分隔开
mediallaminaterminalismembrane
separatingthelaminaterminalisandthepericallosalsistern将终板池与胼周池分隔开
laterallaminaterminalismembrane
separatingthelaminaterminalisandthecarotidorsylviansisten将终板池与侧裂池分隔开
anteriorcerebralmembrane大脑前膜
medialcarotidmembrane
separatingthecarotidandchiasmaticsisterns将颈动脉池与视交叉池分隔开
lateralcarotidmembrane
thelateralwallofthecarotidsistern颈动脉池的外侧壁
anteriorchoroidalmembrane脉络膜前动脉膜
posteriorcommunicatingmembrane后交通动脉膜
separatingthecarotidsisternfromtheposteriorcommunicatingsistern将颈动脉池与后交通动脉池分隔开
internalcarotidmembrane颈内动脉膜
anteriorchoroidalmembrane脉络膜前动脉膜
separatingtheposteriorcommunicatingsisternandsylviansisternfromthecruralsistern将后交通动脉池与脚池分隔开
intracarotidmembrane颈内动脉膜;cruralmembrane脚膜
proximalsylvianmembrane近端侧裂膜
separatingthesylvianandcarotidsisterns将侧裂池与颈动脉池分隔开
lateralsylvianmembrane侧裂外侧膜
extendingalongtheentirelengthofthesylvianfissure沿着侧裂全长延伸
intermediatesylvianmembrane侧裂中间膜
beinglocatedunderthelateralsylvianmembrane位于侧裂外侧膜之下
medialsylvianmembrane侧裂内侧膜
thedeepestinnerarachnoidmembraneofthesylvianfissure侧裂最深处的内蛛网膜
Table2theinnerarachnoidmembranesposteriortothediencephalicleafofliliequist'smembrane【Liliequist膜间脑叶之后的内蛛网膜】
innerarachnoidmembrane内蛛网膜
Liliequist'smembrane【Liliequist膜】
separatingthechiasmaticandcarotidcisternfrominterpeduncularcistern将视交叉池和颈动脉池与脚间池分隔开
Anteroinferiorwalloftheinterpeduncularcistern脚间池的前下壁
Commonleaf总叶;Anteriorperimesencephalicmembrane前中脑周围膜
diencephalic-mesencephalicleaf间脑-中脑叶
Separatingtheinterpeduncularfromoculomotorcistern将脚间池与动眼神经池分隔开
Lateraloculomotormembrane动眼神经外侧膜
Separatingtheoculomotorcisternfromthecruralandambientsistern将动眼神经池与脚池和环池分隔开
Basilararterybifurcationmembrane基底动脉分叉膜
Dividinginterpeduncularcisternintosuperficialanddeepparts将脚间池分成浅部和深部
Posteriorperforatedmembrane后穿质膜
Subdividesthedeeppartofinterpeduncularcistern
Separatingthecruralcisternintosuperiorandinferiorcompartments
Posteriorcerebralmembrane大脑后膜
Dividingtheambientcistrntoasuperiorandinferiorpart
Superiorcerebellarmembrane小脑上膜;Perimesencephalicmembrane中脑周围膜
Medialpontomesencephalicmembrane桥脑中脑内侧膜
Separatingtheinterpeduncularcisternfromtheprepontinecistern将脚间池与桥前池分隔开
Mesencephalicmembrane中脑膜;Medialmesencephalicleaf内侧中脑叶;Topbasilarmembrane基底顶膜;Basilararterybifurcationmembrane基底动脉分叉膜
Lateralpontomesencephalicmembrane桥脑中脑外侧膜
separatingtheinterpeduncularandambientcisternsfromthecerebellopontinecistern将脚间池和环池与小脑桥脑池分隔开
anteriorperimesencephalicmembrane前中脑周围膜;Caudaloculomotormembrane动眼神经尾侧膜;Oculomotormembrane动眼神经膜;Lateralmesencephalicmembrane中脑外侧膜;apartofMesencephalicleaf中脑叶的一部分
Cerebellarprecentralmembrane小脑中央前膜
separatingthequadigeminalcisternlaterallyfromtheambientcistern将四叠体池与外侧的环池分隔开
posteriorperimesencephalicmembrane后中脑周围膜;lateralmesencephalicmembrane中脑外侧膜
Superiorcerebellarmembrane小脑上膜
separatingtheambientcisternorlateralportionofthequadrigeminalcisternfromthecerebellopontineandthetrigeminalcistern将环池或四叠体池外侧部与小脑桥脑池和三叉神经池分隔开
perimesencephalicmembrane中脑周围膜;Lateralmesencephalicmembrane中脑外侧膜
anteriorpontinemembrane桥脑前膜
separatingtheprepontinecisternfromthecerebellopontinecistern将桥脑前池与小脑桥脑池分隔开
separatingthetrigeminalcisternfromthecerebelopontinecistern将三叉神经池与小脑桥脑池分隔开
Medialpontomedullarymembrane桥脑延髓内侧膜
sepatatingthepremedullaryandprepontinecisterns将延髓前池与桥脑前池分隔开
Lateralpontomedullarymembrane桥脑延髓外侧膜
separatingthecerebelopontinefromthepremedullaryand/orcerebellomedullarycistern将小脑桥脑池与延髓前池和/或小脑延髓池分隔开
anteriorinferiorcerebellarmembrane小脑前下膜;Pontomedullarymembrane桥脑延髓膜
Medianmedullarymembrane延髓内侧膜
separatingpartlythebilateralpremedullarycisterns将双侧延髓前池分隔开
sepatatingthepremedullarycisternfromthecerebellomedullarycistern将延髓前池与小脑延髓池分隔开
dividingthecisternamagnaintomedianandlateralparts将枕大池分成内部和外部
dividescisternamagnaintotwoparts:leftandright将枕大池分成左右两部
(3)内蛛网膜的形态和结构特点为变化大:
(4)例举一些内蛛网膜的基本定义(basicdefinitions):
Fig.4Thevariationsoftheappearanceofthebasilararterybifurcationmembrane.Middleimage:Thebasilararterybifurcationmembranewasadensenetwork(triplearrows).1thepituitarystalk,2theposteriorcommunicatingartery,3theposteriorcerebralartery,4thebasilarartery,5theoculomotornerve;singlearrow,theinternalcarotidmembrane;doublearrows,thediencephalicleafofLiliequist’smembrane.FromtheRef.
Fig.5Theinnerarachnoidmembranes:themedialcarotidmembrane(doublearrow),theposteriorcommunicatingmembrane(单箭头arrow)andthediencephalicleafofLiliequist’smembrane(triplearrow).1theposteriorcommunicatingartery,2thepituitarystalk,3theopticchiasm,4theinternalcarotidartery,5theposteriorcerebralartery6thebasilarartery,7theoculomotornerve.FromtheRef.
Fig.3Theinnerarachnoidmembranes:theanteriorchoroidalmembrane(whitearrow)andthediencephalicleafofLiliequist’smembrane(blackarrow).1theposteriorcommunicatingartery,2theanteriorchoroidalartery,3theoculomotornerve,4thebasilarartery,5thepituitarystalk,6theopticchiasm,7theinternalcarotidartery,8thetemporallobe,9theposteriorcerebralartery.FromtheRef.
3、外蛛网膜的延伸(Extensionsoftheouterarachnoidmembranes):
(1)外蛛网膜有两种特殊形式的延伸(twospecialformsofextension):折叠(folding)和鞘(sheaths)。
(2)折叠(foldings):
(3)神经的蛛网膜鞘(arachnoidsheaths):
颅神经的蛛网膜鞘沿着颅神经延伸。当它们离开蛛网膜下腔时,会包绕颅神经。所有十二对颅神经都有各自的蛛网膜鞘。
4、蛛网膜示意图集中展示:
5、内镜下蛛网膜集中展示:
6、外侧裂的蛛网膜及翼点入路遇到的蛛网膜:
LuJ.Arachnoidmembrane:thefirstandprobablythelastpieceoftheroadmap[J].Surgicalandradiologicanatomy:SRA,2015,37(2):127.
LuJ,ZhuXL.Cranialarachnoidmembranes:Someaspectsofmicrosurgicalanatomy[J].CLINICALANATOMY.20:502–511(2007)、
Kurucz,Peter&Baksa,Gabor&Patonay,Lajos&Hopf,Nikolai.(2012).Endoscopicanatomicalstudyofthearachnoidarchitectureonthebaseoftheskull.PartI:Theanteriorandmiddlecranialfossa.InnovativeNeurosurgery.1.55-66.10.1515/ins-2012-0005.
Kurucz,Peter&Baksa,Gabor&Patonay,Lajos&Hopf,Nikolai.(2013).Endoscopicanatomicalstudyofthearachnoidarchitectureonthebaseoftheskull.PartII:Levelofthetentorium,posteriorfossaandthecraniovertebraljunction.InnovativeNeurosurgery.1.91-108.10.1515/ins-2013-0008.
Fushimi,Yasutaka&Miki,Yukio&Ueba,Tetsuya&Kanagaki,Mitsunori&Takahashi,Takahiro&Yamamoto,Akira&Laz,Tabassum&Konishi,Junya&Takahashi,Jun&Hashimoto,Nobuo&Konishi,Junji.(2003).LiliequistMembrane:Three-dimensionalConstructiveInterferenceinSteadyStateMRImaging1.Radiology.229.360-5;discussion365.10.1148/radiol.2292021507.
《ImagingoftheBrain-Saunders(2012)》
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