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脑梗死后继发神经纤维顺行性和逆行性损害的磁共振弥散张量成像 被引量:9

Detection of anterograde and retrograde degeneration after subcortical infarction with diffusion tensor imaging
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摘要 目的应用磁共振弥散张量成像(DTI)技术前瞻性动态观察皮质下局灶性脑梗死后,病灶上、下方远隔部位的神经纤维继发性变化的过程,探讨其与神经功能恢复的意义。方法选择具有单侧大脑中动脉(MCA)供血的皮质下累及内囊的独立病灶脑梗死患者10例,选择年龄性别相匹配的健康志愿者10名作对照研究。患者分别在发病的第(7±2)天(D7)、第(30±3)天(M1)、第(90±3)天(M3)进行DTI检测,并采用美国国立卫生研究院卒中评分(NIHSS)、简式Fugl-Meyer运动功能评分(FM)法和Barthel生活指数(Barthel Index,BI)评定。结果与对照组比较,病灶侧内囊上、下方远隔部位的部分弥散各向异性(FA)值明显减少,而且从D7至M3内囊上方(0.34±0.01和0.28±0.03,P<0.01)、下方(0.42±0.02和0.37±0.06,P<0.01)有逐渐减少趋势,而平均弥散量(MD)却无明显变化。内囊上、下方的FA值均与NIHSS值呈正相关,内囊下方FA值还与Fugl-Meyer运动评分、BI呈负相关。结论局灶性皮质下脑梗死可引起其顺行性和逆行性远隔部位神经纤维的继发性损害,其临床意义尚有待研究。 Objective To investigate the secondary anterograde and retrograde degeneration after subcortical infarction as well as its potential meaning for clinical practice. Methods Ten patients underwent DTI and evaluation with the NIH Stroke Scale (NIHSS), the Fugl-Meyer motor scale (FM) and the barthel index after an isolated subcortical middle cerebral artery (MCA) infarction in the 1 st week (D7), 1 month ( M1 ) and 3 months ( M3 ) respectively. Mean diffusivity ( MD ) and fractional anisotropy ( FA ) were measured at internal capsule, centrum semiovale, cerebral peduncle and pons, from the first week to the third month after stroke onset in these patients and in the same number of age- and sex-matched controls. Neurological deficit was evaluated with the NIHSS, motor deficit with Fugl-Meyer Scale, life independence with Barthel Index. Results The FA values of patients significantly decreased from D7 to M3 in regions above internal capsule ( 0. 34 ± 0. 01 vs 0. 28 ± 0. 03, P 〈 0.01 ) and below the internal capsule ( 0. 42 ± 0. 02 vs 0. 37 ± 0. 06, P 〈 0. 01 ) . No significant modification of MD was detected at these regions. Conclusion A subcortical infarct may result in secondary anterograde and retrograde degeneration at remote regions, but its potential meaning remains unrevealed.
出处 《中华神经科杂志》 CAS CSCD 北大核心 2006年第12期827-831,共5页 Chinese Journal of Neurology
基金 教育部高等学校优秀青年教师教学科研奖励计划资助项目(TRAPOYT 2002年) 国家自然科学基金资助项目(39940012 30271485) 美国CMB基金资助项目(002730) 卫生部临床学科重点项目基金资助项目(2004) 广东省自然科学基金资助项目(990065 21906) 广东省医药卫生科研基金资助项目(B1999035 B2002024 B2003031) 广东省博士基金资助项目(984225) 广东省自然科学基金团队项目(2000年) 广东省自然科学基金攻关项目(B30303 2003B30301)
关键词 脑梗塞 神经纤维 磁共振成像 弥散 Brain infarction Nerve fibers Diffusion magnetic resonance imaging
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参考文献15

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