SEVERAL VISUAL FIELD MAPS WITH DIFFERENTIAL STIMULUS SELECTIVITY

该子项目是利用NIH/NCRR资助的中心赠款提供的资源的许多研究子项目之一。子项目和研究者（PI）可能从另一个NIH来源获得主要资金，因此可以在其他CRISP条目中表示。所列机构为中心，不一定是研究者所在机构。引言人类腹侧枕颞叶皮层（VOT）是重要的许多视觉识别过程，但在这个地区的视野地图还没有被精确确定1 -4。这些地图占据了相当小的皮层表面积，因此即使是现代的功能磁共振成像技术也只能获得1-2打空间样本/地图。因此，重要的是要找到额外的数据源，如刺激选择性，支持视觉区域的存在。在这里，我们描述的颜色，对象和面部响应度的协调测量加上在VOT的视野图。 材料与方法我们使用fMRI和相位编码方法测量VOT的视网膜定位图。旋转楔和扩张环刺激包括3和16黑色和白色，漂移的径向棋盘图案。由此产生的时间相位编码的信号被转移到平坦的视图的视觉皮层和分析与自动化，图集拟合算法。颜色，面部和对象选择性区域被发现与定位器扫描和视野图进行比较。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. INTRODUCTION Human ventral occipitotemporal cortex (VOT) is important for many visual recognition processes, but the visual field maps in this region have not been determined precisely1-4. These maps occupy a fairly small cortical surface area, so that even modern fMRI techniques obtain only 1-2 dozen spatial samples/map. Thus, it is important to find additional sources of data, such as stimulus selectivity, that support the presence of a visual area. Here, we describe coordinated measurements of color, object and face responsivity coupled with visual field maps in VOT. MATERIALS AND METHODS We used fMRI and phase-encoded methods to measure retinotopic maps in VOT. The rotating wedge and expanding ring stimuli consisted of 3¿ and 16¿ black and white, drifting radial checkerboard patterns. The resulting temporal phase-encoded signals were transferred onto flattened views of visual cortex and analyzed with an automated, atlas-fitting algorithm. Color, face, and object-selective regions were found with localizer scans and compared to the visual field maps.