Neurology:功能性磁共振显示帕金森合并冲动控制障碍时皮层纹状体连接存在障碍

2015-05-30 Lianghuaibin 译 MedSci原创

帕金森除典型运动症状(静止性震颤、运动迟缓、肌强直和姿势步态异常)外,还伴有一些非运动症状,包括冲动控制障碍(impulse control disorders,ICD),帕金森患者中ICD患病率为5.9%-13.7 %。ICD是一组反复、过度的精神行为障碍。既包括对问题缺乏了解之前的贸然行动,缺乏思考的冒失反应,还包括难以抑制的对无关刺激或不当刺激的鲁莽行为。表现为无法控制的冲动和欲望,进而做出

帕金森除典型运动症状(静止性震颤、运动迟缓、肌强直和姿势步态异常)外,还伴有一些非运动症状,包括冲动控制障碍(impulse control disorders,ICD),帕金森患者中ICD患病率为5.9%-13.7 %。ICD是一组反复、过度的精神行为障碍。既包括对问题缺乏了解之前的贸然行动,缺乏思考的冒失反应,还包括难以抑制的对无关刺激或不当刺激的鲁莽行为。表现为无法控制的冲动和欲望,进而做出一系列对自己和他人有害的异常行为,包括病理性赌博(patho⁃logical gambling,PG)、强迫性购物、性欲亢进、强迫性进食、病理性纵火、拔毛症、偷窃癖、网络成瘾等。

近日,为比较帕金森在合并冲动控制障碍(impulse control disorders,又称意向控制障碍)时,静息状态下纹状体的功能性连接状态情况,法国里尔的研究人员开展了一项功能磁共振研究,并将研究结果发表在Neurology杂志。

研究者搜集了既患有帕金森又有冲动控制障碍的患者20例,只患帕金森而无冲动控制障碍19例,健康对照者19例。静息态功能磁共振成像。对腹侧纹状体,背侧尾状核,前侧和后侧的壳核半自动分段测量。对于感兴趣的目标区域,使用种子点连接分析(seed-based connectivity analysis)方法对映射到同侧皮层预处理过的fMRI 数据。此外,研究者应用了皮层厚度分析来评估和比较三组受试人群的灰质萎缩程度。

功能性磁共振结果显示,帕金森病合并冲动控制障碍患者,存在左前部壳核、左下颞叶脑回、左前扣带回功能性连接中断相关,此外,部分运动和与之相联结的纹状体区域,边缘叶的以及与之相连接运动皮层的功能性连接也显示中断。只有帕金森而无冲动控制障碍的患者表现和正常人一致,fMRI显示其皮质纹状体的功能性连接正常。皮质厚度分析显示三组人群无明显差异。

研究者在结论中说:在帕金森患者,冲动控制障碍会改变纹状体区(左前壳核),边缘皮层区(左下颞叶脑回、左前扣带回)的连接状态,静息态下上述区域的功能性连接中断。

原始来源:
Nicolas Carriere, MD, Renaud Lopes, PhD, Luc Defebvre, MD, PhD, Christine Delmaire, MD, PhD and Kathy Dujardin, PhD  Impaired corticostriatal connectivity in impulse control disorders in Parkinson disease.Published online before print April 29, 2015, doi: 10.1212/WNL.0000000000001619 Neurology May 26, 2015   vol. 84  no. 21  2116-2123

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    2015-09-03 yinhl1978
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    2015-05-31 huaxipanxing

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