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时间:2019-05-24
《注意缺陷多动障碍儿童静息态功能磁共振》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、·894·中华行为医学与脑科学杂志2010年10月第19卷第10期ChinJBehavMed&BrainSci,October2010,Vol.19,No.10·临床研究·注意缺陷多动障碍儿童静息态功能磁共振比率低频振幅的研究杨志龙王苏弘曹健任艳玲蔡婧张毅力马岭董选【摘要】目的使用静息态功能磁共振(fMRI)比率低频振幅(fALFF)测量技术,从能量的角度对注意缺陷多动障碍(ADHD)儿童与正常儿童进行比较分析,探讨ADHD儿童执行控制脑功能失调病理机制。方法分别对30例学龄期ADHD儿童与30名性别、
2、年龄、受教育程度均相匹配的正常儿童进行静息态fMRI扫描,采用比率低频振幅算法作为指标进行比较分析。结果同正常组比较,fALFF值降低区:双侧额上回(BA10,t=5.40,4.11,Z=4.81,3.82),双侧额中回(BA9,BA46,t=5.72,5.37,Z=5.04,3.08),右侧额内侧回(BA10,t=5.53,Z=4.90),左楔叶(t=3.81,Z=3.57);fALFF值升高区:双侧边缘叶(BA36,t=4.37,5.20,Z=4.02,4.66),右侧脑干(t=4.77,Z=4.3
3、4),双侧小脑(t=4.65,4.83,Z=4.24,4.38)。结论研究提示在静息状态下前额叶的激活降低,其调控的执行控制功能缺陷是ADHD的核心缺陷。在一些脑区表现的高激活区,可能与ADHD执行控制脑功能失调代偿作用有关。【关键词】注意缺陷多动障碍;功能磁共振成像;静息态;比率低频振幅BrainimagingstudiesinchildrenwithattentiondeficithyperactivitydisorderrevealedbyrestingstatefMRIfALFFanalys
4、isYANGZhilong,WANGSuhong,CAOJian,RENYanling,CAIJing,ZHANGYili,MALing,DONGXuan.DepartmentofNeuroscience,ThirdAffiliatedHospitalofSoochowUniversity,ChangZhou213003,China【Abstract】ObjectiveToinvestigatepathologicalmechanismofdysfunctionofexecutivecontro
5、linchildrenwithattentiondeficithyperactivitydisorder(ADHD),usinganewrestingstatefunctionalmagneticresonanceimaging(fMRI)index,fractionalamplitudeoflowfrequencyfluctuation(fALFF).MethodsThirtychildrenofschoolagewithADHDandthirtygender,ageandeducationm
6、atchedhealthycontrolswereexperiencedrestingstatefMRIscans.fALFFapproachwasusedtoanalyzebloodoxygenleveldependentfMRI(BOLDfMRI)datainrestingstate.ResultsComparedwiththenormalcontrols,theADHDshoweddecreasedfALFFinthebilateralsuperiorfrontalgyrus(BA10,t
7、=5.40,4.11,Z=4.81,3.82),bilateralmiddlefrontalgyrus(BA9,BA46,t=5.72,5.37,Z=5.04,3.08),rightmedialfrontalgyrus(BA10,t=5.53,Z=4.90)andleftprecuneus(t=3.81,Z=3.57).AndtheADHDshowedincreasedfALFFinthebilaterallimbiclobe(BA36,t=4.37,5.20,Z=4.02,4.66),rightbra
8、instem(t=4.77,Z=4.34)andbilateralcerebellum(t=4.65,4.83,Z=4.24,4.38).ConclusionTheresultssuggestthatloweractivitionoffrontalmaybethecoredeficitofexecutivecontrolwithADHDinrestingstate,andhighactivationinseveralbrainregion
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