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高频重复经颅磁刺激改善轻度认知障碍患者认知功能的初步分析 被引量:14

Preliminary study of high-frequency repetitive transcranial magnetic stimulation in treatment of mild cognitive impairment
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摘要 目的 探讨高频重复经颅磁刺激(repetitive transcranial magnetic stimulation,rTMS)对MCI的疗效.方法 通过志愿者招募方式,选取石家庄市36名被评估为MCI的患者,采用随机数字表法将其分为试验组(18例)和对照组(18例,脱落3例);采用rTMS(频率为20 Hz)对试验组双侧背外侧前额叶区进行刺激,每次30 min(每侧15 min),每周5次,为期8周;对照组采用相同的治疗频次,使用伪刺激线圈,只产生振动和声音,不产生磁场效应.治疗前后采用MMSE和事件相关电位(event-related potentials,ERPs)听觉oddball范式进行测试,ERPs记录电极置于Fz、Cz和Pz点.采用独立样本t检验和组内(治疗前,治疗后)×组间(试验组,对照组)重复测量方差分析比较2组波幅和潜伏期的变化.结果 (1)与对照组比较,试验组治疗后计数错误率降低[F(1,31)=10.335,P<0.01].(2) MMSE评分:试验组MMSE分数增加比率大于对照组(t=3.36,P<0.05);(3)靶刺激P300:治疗后试验组潜伏期[Fz:(395 ±8) ms,Cz:(423 +8)ms,Pz:(422 +8) ms]较治疗前缩短,与对照组治疗后[Fz:(421 +9) ms,Cz:(425 +7) ms,Pz:(427 +9) ms]相比差异有统计学意义[Fz:F(1,31) =30.194,P <0.01;Cz:F(1,31)=11.987,P<0.01;Pz:F(1,31)=43.381,P<0.01].治疗后试验组波幅[Fz:(8.3±4.4)μV,Cz:(10.9 ±4.1)μV,Pz:(10.6 +3.2) μV]与对照组[Fz:(6.0±2.3)μV,Cz:(8.8±3.4)μV,Pz:(9.7±4.4)μV]相比差异有统计学意义[Fz:F(1,31) =4.852,P<0.05;Cz:F(1,31) =5.137,P<0.05;Pz:F(1,31)=6.553,P<0.05].(4)靶刺激N200:治疗后试验组潜伏期[Fz:(287±8)ms,Cz:(266±34) ms,Pz:(258 +35) ms]较治疗前缩短,与对照组治疗后[Fz:(291 +10) ms,Cz:(281 +35) ms,Pz:(272 +36) ms]相比差异有统计学意义[Fz:F(1,31)=10.475,P <0.01;Cz:F(1,31) =8.073,P<0.01;Pz:F(1,31) =4.431,P<0.05].治疗后2组N200波幅差异无统计学意义(F≤0.512,P>0.05).结论 rTMS对MCI患者的认知功能可能有改善作用. Objective To investigate the therapeutic effect of high-frequency repetitive transcranial magnetic stimulation (rTMS) on the mild cognitive impairment (MCI).Methods The study recruited 36 volunteers from Shijiazhuang City,who were diagnosed with MCI,and randomly divided into a treatment group (18) and a control group (18).Magnetic stimulation site was located in the dorsolateral prefrontal cortex with the frequency of 20 Hz,and 30 minutes (15 minutes on each side) each time,5 times a week for 8 weeks.The control group received the same frequency with pseudo-stimulating coil,which produced vibration and sound,but didn't generate a magnetic field.The MMSE was used to measure cognitive functioning,and event-related potentials (ERPs) in Fz,Cz and Pz were recorded using auditory oddball paradigm.Results (1) Compared with the control group,the patients' count error rate in the experimental group was reduced after the intervention (F(1.31) =10.335,P 〈 0.01).(2) The MMSE scores were significantly improved after intervention than control group (t =3.36,P 〈 0.05).(3) After the treatment,the latency of P300 (Fz:(395 ± 8) ms,Cz:(423 ± 8) ms,Pz:(422 ± 8) ms) was shortened in experimental group compared with control group (Fz:(421 ±9) ms,Cz:(425 ±7) ms,Pz:(427 ±9) ms),(Fz:F(1,31) =30.149,P 〈0.01; Cz:F(1,31) =11.987,P 〈0.01; Pz:F(1,31) =43.381,P 〈0.01).After the intervention,the amplitude of P300 (Fz:(8.3 ± 4.4) μV,Cz:(10.9 ± 4.1) μV,Pz:(10.6 ± 3.2) μV)was increased in experimental group compared to the control group (Fz:(6.0 ± 2.3) μV,Cz:(8.8 ± 3.4)μV,Pz:(9.7±4.4) μV),(Fz:F(1,31)=4.852,P〈0.05; Cz:F(1,31)=5.137,P〈0.05; Pz:F(1,31) =6.553,P 〈 0.05).(4) After the treatment,the latency N200 (Fz:(287 ± 8) ms,Cz:(266 ± 34) ms,Pz:(258 ± 35) ms) was shortened in experimental group compared with control group(Fz:(291 ± 10) ms,Cz:(281±35) ms,Pz:(272±36) ms),(Fz:F(1,31)=10.475,P〈0.01; Cz:F(1,31) =8.073,P〈0.01;Pz:F(1,31) =4.431,P 〈 0.05).For N200 amplitude,no significant effects were observed (F≤0.512,P 〉0.05).Conclusion The 8-week high-frequency repetitive transcranial magnetic stimulation treatment may improve the cognitive function in patients with MCI.
出处 《中华精神科杂志》 CAS CSCD 北大核心 2014年第4期227-231,共5页 Chinese Journal of Psychiatry
基金 河北省科技支撑计划重大项目(09276103D)
关键词 诱发电位 高频重复经颅磁刺激 轻度认知障碍 Evoked potentials Repetitive transcranial magnetic stimulation Mild cognitive impairment
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