简介：BACKGROUND:Asaginginelderlypeople,theirbraintissuehasdegenerationandbrainatrophyofdifferentseverity,andthevolumeofcranialcavityisrelativelyenlarged,ithasgreatercompensatoryabilitytothespaceoccupyinglesion,anditisdifficulttodetectthemeningiomabecauseitgrowstoexpandslowly,thetumorlocatesinnon-functionalregion,andthereareatypicalsymptomsanddeficiencyoflocalizationsigns.OBJECTIVE:Toinvestigatetheclinicopathologicfeaturesofsenilemeningiomas.DESIGN:Aretrospectiveanalysis.SETTING:AffiliatedHospitalofHebeiUniversity.PARTICIPANTS:Forty-nineelderlypatientswithmeningiomawereselectedfromtheDepartmentofNeurosurgery,AffiliatedHospitalofHebeiUniversityfromMay1999toMarch2005,including15malesand34females,60-74yearsofage,andtheywerealldiagnosedbyCTandMRI.METHODS:ThesitesoftumorswereidentifiedbyCTandMRIexaminationsinallthepatients.Thetumorswerepartiallyortotallyresectedaccordingtotheirownconditions.Thetypesoftheresectedtumorwerepathologicallyobserved.Theconditionsofpostoperativerecoverywereobservedafter1,3and6months,andwithoutnewneurologicaldysfunctionorcomplicationwasconsideredasgoodoutcome.MAINOUTCOMEMEASURES:①Sitesandpathologicaltypesofthetumor;②Postoperativeoutcomesandcomplications.RESULTS:Allthe49patientswereinvolvedintheanalysisofresults.①Thetumorshadwidedistributionswithamainlocationinbrainconvexity.Amongthe49casesofmeningioma,therewere25casesoffibrocystictype,12casesofmeningothelialtype,6casesofpsammomatoustype,4casesofangiomatoustypeand2casesofmicrocystictype.②Amongthe49patients,35hadgoodoutcome,8hadself-careability,4requiredcarebyothers,2(4.1%)diedpostoperatively.Nolong-termcomplicationrelatedtotheoperationwasobservedduringthefollow-uppostoperatively.CONCLUSION:Meningiomahasamainlocationinbrainconvexity,andits

简介：Artificialfacialnerveprosthesesarethoughttorestoreeye-closedfunctioninperipheralfacialparalysispatients.Atpresent,however,thereisnoadequatequantitativeorqualitativeinformationregardingmyoelectricsignal(MES)featuresforhealthyorbicularisoculimuscle(OOM).ThepresentstudyanalyzedMESfeaturesofnormalOOMinrabbitsduringthenaturalcontinuouseye-opening(N1)state,naturalcontinuouseye-closing(N2)state,naturalblink(N3)state,andevokedeye-closing(E)stateaccordingtotimedomainandfrequencydomainanalysis.ResultsshowedthatOOMelectricalactivitiesinN1andN2states,aswellasmyoelectricamplitude,werelowandstable.Nevertheless,duringN3andEstates,OOMelectricalactivitiesweresignificantlyincreasedandamplitudewasmuchhigherintheEstatethanintheN3state.Inthetimedomain,differencesinMESpeakabsolutepotentialwerenotsignificantbetweenN1andN2states.Inthefrequencydomain,differencesinpowerspectraldensitypeakfrequencyofelectromyogramsignalsweresignificantbetweentwosetsoffourOOMmovementstates.TheseresultssuggestthatOOMsignificantlycontractsandinduceseyelid-closingaction.Inaddition,OOMisdiastolicduringtheN1state.AN2statedoesnotrequirecontinuousintensiveOOMcontraction.Moreover,distinctionsofquantitativeinformationintimeandfrequencydomainfeaturesofMEScanbeusedasanOOMreferencetoidentifymusclemovementpatterns.