机构地区:[1]首都医科大学宣武医院神经生物室,北京100053 [2]杭州师范大学国际服务工程学院,杭州311121 [3]杭州师范大学附属医院认知与脑疾病研究中心,杭州311121 [4]浙江省认知障碍的评估重点实验室,杭州311121 [5]首都医科大学附属天坛医院神经变性科,北京100050
出 处:《中华行为医学与脑科学杂志》2016年第3期220-225,共6页Chinese Journal of Behavioral Medicine and Brain Science
基 金:国家自然科学基金(81071012;81271429)
摘 要:目的:探讨帕金森病( PD)患者脑活动在不同频段上的变化。方法利用功能磁共振技术获得39例帕金森患者及37例正常人(NC)的脑血氧水平依赖信号(BOLD),用低频振幅算法( ALFF)计算BOLD 信号在不同频段上的变化。运用 ALFF 算法,得到每个受试者在5个频段( slow-2:0.198~0.25 Hz; slow-3:0.073~0.198 Hz; slow-4:0.027~0.073 Hz; slow-5:0.01~0.027 Hz;slow-6:0~0.01Hz)上的脑图,将两组受试者的5个频段的统计图进行2×5的重复测量方差分析及Post-hoc t检验,得到5个t检验图,得到每个频段上的两组间差异有统计学意义的脑区。 PD组ALFF分别与对应个体的帕金森综合评定量表( UPDRS)第三部分进行相关分析,得到5个频段的PD患者与疾病严重性相关的脑活动区。结果与 NC 组相比, PD 组在 slow-3, slow-4和 slow-5上,壳核[(-24,-3,-9)(-30,3,0)(-21,9,6)]区域存在ALFF降低,而左侧中央前回[slow-2,3,4,6(-21,-24,75)(-21,-24,72)(-27,-21,72)(-15,-15,72)]及右侧前辅助运动区[slow-2,3,4,6(21,-24,75)(6,-3,72)(12,-6,60)(15,-24,72)]在除了slow-5以外的频段均存在ALFF降低。小脑在slow-2(-36,-45,-33),slow-3(-36,-45,-33)(21,-93,-30),slow-4(27,-93,-18),slow-5(-21,-81,-24)(12,-93,-27),slow-6(-42,-42,-33)的ALFF均增高。在slow-3,slow-5和slow-6,壳核与UPDRS第三部分评分成负相关。结论 PD纹状体的异常活动在slow-3,slow-4,slow-5即传统低频段内显著,除slow-5外的其他频段则在发现皮质运动区异常更有优势,全频段均能发现小脑活动增强, PD不同频段的局部脑活动具有不同特点,多频段分析给将来的研究提供了新视角。Objective To explore the pattern of spontaneous neural activity in different frequency bands in Parkinson's disease(PD).Methods The blood oxygen level-dependent signals in 39 PD patients and 37 normal controls were acquired and the amplitude of low-frequency fluctuation ( ALFF) in five differ-ent frequecy bands ( slow-2:0.198-0.25 Hz;slow-3:0.073-0.198 Hz;slow-4:0.027-0.073 Hz;slow-5:0.01-0.027 Hz;slow-6:0-0.01Hz) was cacaulated.A repeated-measures analysis of variance and Post hoc t-test were performed to detect differences of spontaneous activity between two groups in different frequency bands. A correlation analysis was examined between Unified Parkinson’ s Disease Rating Scale ( UPDRS) motor score and ALFF in patients with PD in each frequency band to discover the relationship between disease se-verity and spontaneous neural activity.Results Compared with the normal controls,patients with PD had decreased ALFF in the putamen(-24,-3,-9) (-30,3,0) ( -21,9,6) in the slow-3,slow-4 and slow-5, and had decreased ALFF in the left precentral gyrus (-21,-24,75) (-21,-24,72) (-27,-21,72) (-15,-15,72) and right supplementary motor area (21,-24,75) (6,-3,72) (12,-6,60) (15,-24,72) in all frequency bands except for the slow-5.Increased ALFF in the cerebellum was found in all frequency bands.The ALFF in the putamen was negatively correlated with the UPDRS motor score in the slow-3,slow-5 and slow-6.Conclusion This study shows that the abnormal activities in the striatum are significant in the slow-3,slow-4and slow-5.Most frequency bands except slow-5 are helpful in detecting neural changes in mo-tor cortex.The increased activity in the cerebellum is the common findings in all frequency bands.Multiple frequency analysis may provide insight into the pathophysiological mechanisms of PD.
分 类 号:R445.2[医药卫生—影像医学与核医学] R742.5[医药卫生—诊断学]
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