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从脑区分布看脑供血不足的症状有哪些

顾建文,解放军医院,神经外科

脑供血不足是中老年人最常见的脑血管疾病,通常与高血脂症、高血压、糖尿病等基础疾病引起的动脉硬化有关的,动脉内的粥样斑块形成可以导致动脉狭窄,从而影响到大脑的血供,引起一些神经系统的症状。该病给患者的身心健康造成很大的危害,因此日常如果出现脑供血不足的症状时,还需及早治疗。下面是脑区分布

Intraparietalsulcus(IPS):顶间沟

TheIPScontainsaseriesoffunctionallydistinctsubregionsthathavebeenintensivelyinvestigatedusingbothsinglecellneurophysiologyinprimatesandhumanfunctionalneuroimaging.

Itsprincipalfunctionsarerelatedtoperceptual-motorcoordination(fordirectingeyemovementsandreaching)andvisualattention.

TheIPSisalsothoughttoplayaroleinotherfunctions,includingprocessingsymbolicnumericalinformation,visuospatialworkingmemoryandinterpretingtheintentofothers.

FrontalEyeFields(FEF):前额眼区

Thecorticalareacalledfrontaleyefields(FEF)playsanimportantroleinthecontrolofvisualattentionandeyemovements.ElectricalstimulationintheFEFelicitssaccadiceyemovements.TheFEFhaveatopographicstructureandrepresentssaccadetargetsinretinotopiccoordinates.

Frontaleyefieldsisroughlylocatedbetweenregions#4,#6,and#8

TemporoparietalJunction(TPJ):顶枕联合

TheTPJincorporatesinformationfromthethalamusandthelimbicsystem,aswellasfromthevisual,auditory,andsomatosensorysystems.TheTPJalsointegratesinformationfromboththeexternalenvironmentaswellasfromwithinthebody.

Thisareaisalsoknowntoplayacrucialroleinself-otherdistinctionsprocessesandtheoryofmind(ToM).DamagetotheTPJhasbeenimplicatedinhavingadverseeffectsonanindividual’sabilitytomakemoraldecisionsandhasbeenknowntoproduceout-of-bodyexperiences

Defaultmodenetwork(DMN):默认网络

DMNisanetworkofbrainregionsthatareactivewhentheindividualisnotfocusedontheoutsideworldandthebrainisatwakefulrest.Alsocalledthedefaultnetwork,defaultstatenetwork,ortask-negativenetwork(TNN),itischaracterizedbycoherentneuronaloscillationsataratelowerthan0.1Hz(oneeverytenseconds).Duringgoal-orientedactivity,theDMNisdeactivatedandanothernetwork,thetask-positivenetwork(TPN)isactivated.Thedefaultnetworkmaycorrespondtotask-independentintrospection,orself-referentialthought,whiletheTPNcorrespondstoaction,andthatperhapstheTNNandTPNmaybe"consideredelementsofasingledefaultnetworkwithanti-correlated







































白癜风症状有那些
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