论文部分内容阅读
目的:利用功能磁共振成像技术,观察旋转光栅刺激引起的视觉皮层生理反应,探索其反应的组成成分。方法:在1.5T磁共振扫描仪上,对9例健康志愿者以梯度回波基础上加平面回波(GRE-EPI)成像序列法采集旋转光栅引起的视皮层反应数据,SPM99软件进行数据离线后处理。结果:旋转光栅的各种刺激成分引起不同视觉皮层中枢的兴奋。枕叶中央区域的强烈反应位于初级视觉皮层区,与白光刺激有关;两侧19区的反应与视觉运动功能有关。枕叶中央微弱反应区与形状察觉功能有关。结论:旋转光栅包含丰富的视觉信息,作为刺激源可兴奋视觉中枢的不同区域。功能磁共振成像技术可以作为研究视皮层生理的良好工具。
OBJECTIVE: To observe the visual cortex physiological responses induced by rotational grating stimulation and to explore the components of the reaction using functional magnetic resonance imaging. Methods: 9 cases of healthy volunteers were collected on a 1.5T magnetic resonance scanner with gradient echography and GRE-EPI imaging sequence to collect the visual cortex reaction data. SPM99 software was used for data offline Post-processing. Results: The various stimulating components of the rotating grating cause excitement in different visual cortical centers. The strong reaction in the central region of the occipital lobe is located in the primary visual cortex area, which is related to white light stimulation. The responses of the 19 regions on both sides are related to the visual motor function. Occipital lobe central weak reaction zone and shape-aware function. Conclusion: Rotating gratings contain a wealth of visual information that excites the different regions of the visual center as stimuli. FMRI can be a good tool to study the physiology of the visual cortex.