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目的 研究 gap task模式下反射性视觉诱导性眼扫动的左侧皮层控制机制。 方法 以左侧额叶脑梗死患者、左侧顶叶脑梗死患者与正常受试者为研究对象 ,按照 gap task模式测定左右眼扫动速度及潜伏期 ,并观察眼动波形 ,通过组间对照以探讨该模式眼扫动的皮层控制机制。结果 左侧顶叶病变患者出现双向启动延迟 ,但以右向眼动的受累更为显著 ;左侧顶叶与额叶病变均会引起右向眼扫动准确性下降。结论 对于 gap task模式下反射性视觉诱导性眼扫动 ,左侧顶叶可以启动双向眼动 ,并表现出支配向右侧的眼球运动优势 ,额叶则不参与启动过程 ;左侧顶叶与额叶共同参与调节向对侧的眼球运动幅度 ,以保证眼扫动的准确性。
Objective To investigate the left cortical control mechanism of reflective visual evoked eye-sweep in gap task mode. Methods Left frontal lobe cerebral infarction patients, left parietal lobe cerebral infarction patients and normal subjects were studied. According to the gap task mode, the left and right eye scanning velocity and latency were observed, and the eye movement waveforms were observed. Explore the mode of eye cortex control mechanism. Results The patients with left parietal lobe lesions presented delayed bidirectional activation, but their movement to the right occipital lobe was more significant. Left parietal lobe and frontal lobe lesions all caused right-sided ocular motility descent. Conclusions For reflective visual evoked eye-sweep in the gap task mode, the left parietal lobe can initiate bidirectional eye movements and show dominant eye movements to the right, with the frontal lobes not participating in the initiating process. The left parietal lobe and Frontal lobe to participate in regulating the contralateral eye movement amplitude, in order to ensure the accuracy of eye sweeping.