The tentorium cerebelli is a constituent part of the posterior cranial fossa meninges and receives its arterial supply from the meningeal ...Neuroanatomy,TentoriumCerebelliMedicalReferenceNeuroanatomy,TentoriumCerebelliReviewquestions:TakeFreeQuestionsonthisArticleIntroductionThetentoriumcerebelliisoneoffourdistinguishableduralreflectionswhich partitionthecranialcavityintoincompletecompartments.[1] Thefalxcerebri,diaphragmasellae,andfalxcerebelliconstitutetheotherthreerecognizableduralfolds.TheFrenchanatomistJacquesBénigneWinslowin1732wasthefirsttousethedesignation'LaTente'indescribingthetentoriumcerebelli,whichdividesthecranialcavityintosupratentorialandinfratentorialcompartments.[1]StructureandFunctionThetentoriumcerebelliisanextensionoftheduramaterandconstitutesthesecondlargestofthefourdistinguishableduralsepta.[2] The anteriorfreeedgeofthis tough,collagenous tentattachestotheanteriorclinoidprocessoneitherside;thisfreeedgepossessesadistinctnotchdesignated'insisuratentorii'ortentorialnotch, whichisborderedanteriorlybytheclivus.[1]Furthermore,theattachmentofthisfreeedgeofthetentoriumcerebellitotheclinoidprocesscontributestotheformationofthelateralpartofthecavernoussinus.Theposteriorclinoidprocesses, superiorbordersofthepetroustemporalbone,andthegroovesforthetransversesinusesontheoccipitalbonealsoprovideattachmenttothetentoriumcerebelli.[3] Asalludedtoabove,thetentoriumcerebellidividesthecranialcavityintosupratentorialandinfratentorialcompartments.Thefalxcerebri(averticalfoldofduraandthelargestofthefourduralsepta)attachestothesuperiorsurfaceofthetentoriumcerebellialongthemidline(thestraightsinusiscontained withinthisattachment),andafurtherverticalfoldofdura;thefalxcerebelliisattachedtoitsinferiorsurfacealongitsmidline.Asitsnameimplies,thetentoriumcerebelliassumestheshapeofatentwithanarchedlaminabearingamidlinesummit,inclininginferiorlytowardsitsperiphery. Theinterpeduncularcisternand brainstemoccupytheanteriorandmiddleaspectsofthespaceformedbythetentorialnotch andth