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目的采用近红外脑功能成像技术(fNIRS)观察不同吞咽任务对脑卒中后吞咽障碍患者大脑皮质激活和脑功能连接程度的影响。方法选取符合纳入和排除标准的30例脑卒中后吞咽功能障碍患者作为研究对象
所有患者均接受三项不同的吞咽任务
分别是吞咽动作观察(SO)、吞咽动作执行(SE)和吞咽动作想象(SI)。采用fNIRS采集脑卒中后吞咽障碍患者在执行不同任务时的氧合血红蛋白(HbO2)和脱氧血红蛋白(HbR)的浓度
通过NirSpark软件对HbO2和HbR的浓度进行分析
得出患者的大脑皮质激活情况(β值)和脑功能连接程度。结果与静息态相比
脑卒中后吞咽障碍患者在执行SO任务时被激活得区域包括左初级感觉皮质(LS1)、右前额叶皮质(RPFC);在执行SE任务时被激活得区域包括左前额叶皮质(LPFC)、左初级感觉皮质(LS1)、右前额叶皮质(RPFC)、左运动皮质(LM1);在执行SI任务时被激活得区域包括左前额叶皮质(LPFC)、左初级感觉皮质(LS1)和右前额叶皮质(RPFC)。与出血性脑卒中患者比较
缺血性脑卒中患者在执行SE任务时
右初级感觉皮质(RS1)
右运动皮质(RM1)和左初级感觉皮质(LS1)出现明显的激活。脑卒中后吞咽障碍患者在执行SO任务时平均脑功能连接值是(0.241±0.089);在执行SE任务时平均脑功能连接值是(0.251±0.086)
在执行SI任务时平均脑功能连接值是(0.239±0.087)
静息状态时的平均脑功能连接值是(0.213±0.093)。脑卒中后吞咽障碍患者在执行3项吞咽任务时的平均脑功能连接值均显著高于其静息态
差异均有统计学意义(P<0.05)
且其在执行SE任务时的平均脑功能连接值明显高于执行SI任务时
差异有统计学意义(P<0.05)。结论脑卒中后吞咽障碍患者在执行不同的吞咽任务时
前额叶皮质和初级感觉皮质的激活较为广泛
且不同的吞咽任务均可改善脑卒中后吞咽障碍患者的平均脑功能连接值。
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