中国神经再生研究(英文版) ›› 2017, Vol. 12 ›› Issue (1): 109-117.doi: 10.4103/1673-5374.198996

• 原著:脑损伤修复保护与再生 • 上一篇    下一篇

亚急性期脑卒中Broca失语症语言网络皮质重组:一项血氧水平依赖功能磁共振成像研究证据

  

  • 收稿日期:2016-11-10 出版日期:2017-01-15 发布日期:2017-01-15
  • 基金资助:

    广东省自然科学基金项目(2016A030313327),广州市科技发展项目(201607010185),广东省科技发展项目(2016A020215226),中国国家自然科学基金项目(81401869)

Evidence of cortical reorganization of language networks after stroke with subacute Broca’s aphasia: a blood oxygenation level dependent-functional magnetic resonance imaging study

Wei-hong Qiu1, Hui-xiang Wu1, Qing-lu Yang1, Zhuang Kang2, Zhao-cong Chen1, Kui Li1, Guo-rong Qiu1, Chun-qing Xie1, Gui-fang Wan1, Shao-qiong Chen2   

  1. 1 Department of Rehabilitation Medicine, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, China; 
    2 Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong Province, China
  • Received:2016-11-10 Online:2017-01-15 Published:2017-01-15
  • Contact: Wei-hong Qiu, M.D. or Kui Li, q-weihong@163.com or likui3@126.com.
  • Supported by:

    This study was supported by the Natural Science Foundation of Guangdong Province of China, No. 2016A030313327; the Science and Technology Planning Project of Guangzhou City of China, No. 201607010185; the Science and Technology Planning Project of Guangdong Province of China, No. 2016A020215226.

摘要:

 

失语症是卒中后常见的症状,是一种获得性语言障碍,目前的治疗措施不十分理想,其原因之一是对该病的发病机制尚不完全了解。为此,我们采用血氧水平依赖功能磁共振成像观察了脑卒中后1-3个月 Broca失语症患者双侧大脑皮质的激活情况。结果表明,语言表达过程与多个脑区有关,其中大脑右半球参与语言的生成。失语症患者大脑左半球激活面积较健康对照者减少,且与语言相关的右额叶下回(Broca的镜像区域)的激活频率、体积及强度均明显下降,而右颞叶上回、双侧顶叶上小叶和左颞叶下回激活较健康对照者增强,表明亚急性期脑卒中失语症患者存在语言网络皮质重组现象,从而进一步明确了脑卒中失语症的发病机制。

ORCID:0000-0002-0020-8659(Wei-hong Qiu);0000-0002-2642-5213(Kui Li)

Abstract:

 

Aphasia is an acquired language disorder that is a common consequence of stroke. The pathogenesis of the disease is not fully understood, and as a result, current treatment options are not satisfactory. Here, we used blood oxygenation level-dependent functional magnetic resonance imaging to evaluate the activation of bilateral cortices in patients with Broca’s aphasia 1 to 3 months after stroke. Our results showed that language expression was associated with multiple brain regions in which the right hemisphere participated in the generation of language. The activation areas in the left hemisphere of aphasia patients were significantly smaller compared with those in healthy adults. The activation frequency, volumes, and intensity in the regions related to language, such as the left inferior frontal gyrus (Broca’s area), the left superior temporal gyrus, and the right inferior frontal gyrus (the mirror region of Broca’s area), were lower in patients compared with healthy adults. In contrast, activation in the right superior temporal gyrus, the bilateral superior parietal lobule, and the left inferior temporal gyrus was stronger in patients compared with healthy controls. These results suggest that the right inferior frontal gyrus plays a role in the recovery of language function in the subacute stage of stroke-related aphasia by increasing the engagement of related brain areas.

Key words: nerve regeneration, functional magnetic resonance imaging, cortical functional connectivity, language regions, neuroplasticity, Perisylvian language regions, brain activation, right hemisphere, picture-naming task, neural regeneration