简介：<正>Theskullbasegenerallyreferstotheanterior,middleandposteriorcranialfossaandstructuresontheoutsidesideoftheseskullareas.Thecranialroofandskullbaseareseparatedbyalineconnectingtheexternaloccipitalprotuberance,parietalnotchandsupraorbitalridge[1].Theskullbasesupportsthebrainabove,isconnectedto

简介：ObjectsToinvestigatetheextentofhearinglossinanelderlysamplepopulationtoestimatehearingdisordersamongtheage-equivalentpopulationinChinaandtostudyprimaryclinicalcharacteristicsofpresbycusis.MethodsClinicaldatafrom110hearinglosspatientsofbothseniumandpre-seniumages(95malesand15females,meanage=74.4±12.1years)werereviewed.Patientsagedfrom50to59yearswereacceptedasthepre-seniumcontrolgroup(n=15).The95seniumpatients(>60yearsofage)weredividedinto4groupsaccordingtoage:60+group(60to69years,n=25),70+group(70to79years,n=26),80+group(80to89years,n=32)and90+group(90yearsorolder,n=12).Puretoneaudiometrythresholdsweremeasuredinall110patients.HearinglossseverityofeachtestedearwasratedaccordingtotheGoodmanclassificationcriteria.Besides,audiometricconfigurationwasexaminedineachear.ResultsAudiometrictestingshowednormalhearingin65ears(29.5%),slighttomoderatelyseverehearinglossin131ears(59.5%),andsevereandprofoundlossin24ears(11%).Air-bonegapswerefoundin12ears(5.45%)indicatingconductivehearingloss.Exceptthe12earswithconductivehearingloss,audiogramsshowedgraduallyslopinglossin99ears(45%),sharplyslopinglossin34ears(15.45%),flatlossin45ears(20.45%),notchpatternlossin5ears(2.27%),troughandrisingpatternlossin2ears(0.91%),totaldeafnessin2ears(0.91%),andnormalhearingin21ears(9.55%).Onaverage,hearingthresholdsincreasedatarateofapproximately10dBper10yearforsubjectsaged60andolder.ConclusionsHearingthresholdstendtobestableinpresbycusispatientsagedfrom50to70years,increasesignificantlybetween70and80yearsofage,andreachanotherstablestageathighlevelsafter80yearsofage,especiallyinhighfrequencies.Hearinglossinmiddlefrequenciesaccountsformostofrecessioninloudnessperception.

简介：Objective:Toreviewdevelopmentsinsoundprocessorsoverthepast30yearsthathaveresultedinsignificantimprovementsinoutcomesforNucleus~recipients.

简介：ObjectiveToanalyzethecharacteristicsofauditorybrainstemresponse(ABR)inpresbycusispatientsel-derthan90years.MethodsFourteenpresbycusispatientselderthan90years(presbycusisgroup,91.1.4±1.3years,26ears)and9normal-hearingyoungadults(controlgroup,22.7±1.2years,18ears)participatedinthestudy.Alternativeclick-evokedABRswererecordedinbothgroups.Thepeaklatency(PL)ofpeakI,Ⅲ,andV,andtheinter-peaklatency(IPI)ofI-Ⅲ,Ⅲ-V,andI-Vwerecomparedbetweengroups.ResultsInelderpresbycusispatients,theoccurrencerateofpeakIandⅢwereboth76.9%,andthatofpeakVwas84.6%.Inpresbycusisgroup,thepeaklatenciesofI,Ⅲ,Vweresignificantlylongerthanthatofcontrolgroup(P<0.001).TherewasnosignificantdifferencebetweengroupsintheIPIofpeakI-IⅢ(P=0.298,peakⅢ-V(P=0.254)andpeakI-V(P=0.364).ConclusionsAuditorybrainstemresponsesinpresbycusispa-tientselderthan90yearsshowedworsewavedifferentiation.