机构地区:[1]解放军总医院放射科,北京100853 [2]解放军总医院神经内科,北京100853 [3]解放军总医院医学工程中心,北京100853
出 处:《中华放射学杂志》2008年第4期350-354,共5页Chinese Journal of Radiology
基 金:国家自然科学基金资助项目(30470512)
摘 要:目的研究肌萎缩侧索硬化症(ALS)患者顺次对指运动时脑部运动皮层的血氧水平依赖(BOLD)功能MRI(fMRI)变化。方法对15例临床确诊及拟诊为ALS的患者(ALS组)和15名年龄、性别相匹配的健康志愿者(对照组)进行BOLDMR扫描。所有受试者均为右利手,无其他疾病,近期未服用过影响神经系统功能的药物,受试者进行频率为1~2次/s的顺次对指运动。使用3.0TMR机获取梯度回波-回波平面成像(GRE—EPI)序列功能图像。所得数据采用统计参数图(SPM)2软件进行分析。激活脑区体积的比较采用t检验。结果2组在完成相同运动任务时均有激活的脑区包括:双侧主感觉运动皮层(PSM)、双侧运动前区(PA)后部、双侧辅助运动区(SMA)、对侧外下运动前区(ILPA)、双侧顶叶区(PAR)和同侧小脑半球。ALS组激活体积较对照组激活体积明显增大的区域包括:双侧PSM及双侧PA后部[右手同侧激活:ALS组为(924.5±141.1)mm^3,对照组为(829.9±98.4)mm^3(P=0.05);右手对侧激活:ALS组为(9143.8±702.8)mm^3,对照组为(8638.8±506.4)mm^3(P〈0.05);左手同侧激活:ALS组为(1162.5±357.4)mm^3,对照组为(902.5±184.2)mm^3(P〈0.05);左手对侧激活:ALS组为(8255.2±870.2)mm^3,对照组为(5934.6±616.4)mm^3(P〈0.05)]、双侧SMA[右手双侧激活:ALS组为(6564.3±720.6)mm^3,对照组为(4710.7±416.3)mm^3(P〈0.05);左手双侧激活:ALS组为(6970.5±961.8)mm^3,对照组为(3688.9±672.3)mm^3(P〈0.05)]及同侧小脑半球[右手同侧激活:ALS组为(2720.0±1154.2)mm^3,对照组为(254.3±84.4)mm^3(P〈0.05);左手同侧激活:ALS组为(4794.4±1237.0)mm^3,对照组为(1689.0±719.6)mm^3(P〈0.05)]。ALS组额外激活的区域包括:同侧ILPA、对侧小Objective To study the changes of motor cortex in patients with amyotrophic lateral sclerosis (ALS) while executing sequential finger tapping movement by using blood oxygenation level dependent (BOLD) functional MRI. Methods Fifteen patients with definite or probable ALS and 15 age and gender matched normal controls were enrolled in the BOLD study, and all the subjects were right-handed with no other diseases or any recent medication history. A 3. 0 T MR scanner was employed and gradient echo EPI (GRE-EPI)sequence was used to acquire the functional images. Subjects executed sequential finger tapping movement at a frequency of 1--2 Hz during a block design task. fMRI data were analyzed by using statistical parametric mapping ( SPM ) 2. Volume of activated brain areas was compared with the use of a Student's t-test. Results Bilateral primary sensorimotor cortex (PSM), bilateral posterior aspect of premotor area (PA), bilateral supplementary motor area (SMA), contralateral inferior lateral premotor area (ILPA) , bilateral parietal region ( PAR), and ipsilateral cerebellum showed activation in both AIS patients and normal controls when executing the same motor task. The activation areas in bilateral PSM and bilateral posterior aspect of PA ( right hand ipsilateral activation : ALS ( 924. 5 ± 141.1 ) mm^3, control ( 829. 9 ± 98.4) mm^3, P =0. 05 ;right hand contralateral activation: ALS (9143. 8 ±702. 8) mm^3 , control (8638. 8 ± 506.4) mm^3 P〈0.05;left hand ipsilateral activation: AIS (1162.5 ±357.4) mm^3 control (902.5 ± 184.2) mm^3, P 〈 0.05; left hand contralateral activation: AIS (8255.2 ± 870.2) mm^3, control (5934. 6 ±616.4) mm^3 , P 〈 0. 05 ), bilateral SMA ( right hand bilateral activation: AIS ( 6564. 3 ± 720.6) mm^3, control (4710.7 ±416.3) mm^3 , P 〈0.05;left hand bilateral activation: AIS (6970.5 ± 961.8) mm^3, control (3688.9 ± 672.3) mm^3 , P 〈0.05) , and ipsilateral cerebellu
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