Mapping spatial frequency preferences across human primary visual cortex.
Mapping spatial frequency preferences across human primary visual cortex.
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DOI：
10.1167/jov.22.4.3
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发表时间：
2022-03-02
影响因子：
1.8
通讯作者：
Winawer J
中科院分区：
文献类型：
--
作者：
Broderick WF;Simoncelli EP;Winawer J
灵长类动物视觉皮层（V1区）的神经元对空间频率进行调谐，其方式取决于它们在视野中的位置。有几项研究使用功能性磁共振成像（fMRI）检查了这种依赖性，报告了V1体素的首选空间频率（调谐曲线峰值）作为偏心率的函数，但他们的结果相差多达两个八度，可能是由于刺激，测量和分析方法的差异。在这里，我们的特征空间频率调谐在毫米分辨率在人类初级视觉皮层，跨刺激方向和视野位置。我们测量了一组新的刺激，构造为正弦光栅在对数极坐标，其中包括圆形，径向和螺旋形的几何形状的功能磁共振成像响应。对于每个单独的刺激，局部空间频率与偏心率成反比，并且对于视野中的任何给定位置，完整的刺激集跨越宽范围的空间频率和方向。在偏心率的测量范围内，优选的空间频率通过作为偏心率的倒数加上小常数而变化的函数很好地拟合。我们还发现小，但系统的局部刺激方向的影响，定义在绝对坐标和相对于视野位置。具体而言，峰值空间频率是更高的风车比环形刺激和水平比垂直刺激。
Neurons in primate visual cortex (area V1) are tuned for spatial frequency, in a manner that depends on their position in the visual field. Several studies have examined this dependency using functional magnetic resonance imaging (fMRI), reporting preferred spatial frequencies (tuning curve peaks) of V1 voxels as a function of eccentricity, but their results differ by as much as two octaves, presumably owing to differences in stimuli, measurements, and analysis methodology. Here, we characterize spatial frequency tuning at a millimeter resolution within the human primary visual cortex, across stimulus orientation and visual field locations. We measured fMRI responses to a novel set of stimuli, constructed as sinusoidal gratings in log-polar coordinates, which include circular, radial, and spiral geometries. For each individual stimulus, the local spatial frequency varies inversely with eccentricity, and for any given location in the visual field, the full set of stimuli span a broad range of spatial frequencies and orientations. Over the measured range of eccentricities, the preferred spatial frequency is well-fit by a function that varies as the inverse of the eccentricity plus a small constant. We also find small but systematic effects of local stimulus orientation, defined in both absolute coordinates and relative to visual field location. Specifically, peak spatial frequency is higher for pinwheel than annular stimuli and for horizontal than vertical stimuli.
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影响因子：
3.5
作者：
Gorgolewski K;Burns CD;Madison C;Clark D;Halchenko YO;Waskom ML;Ghosh SS
通讯作者：
Ghosh SS
影响因子：
64.8
作者：
Harris CR;Millman KJ;van der Walt SJ;Gommers R;Virtanen P;Cournapeau D;Wieser E;Taylor J;Berg S;Smith NJ;Kern R;Picus M;Hoyer S;van Kerkwijk MH;Brett M;Haldane A;Del Río JF;Wiebe M;Peterson P;Gérard-Marchant P;Sheppard K;Reddy T;Weckesser W;Abbasi H;Gohlke C;Oliphant TE
通讯作者：
Oliphant TE
影响因子：
5.3
作者：
Gagnon, Louis;Sakadzic, Sava;Boas, David A.
通讯作者：
Boas, David A.
影响因子：
4.3
作者：
Benson NC;Butt OH;Brainard DH;Aguirre GK
通讯作者：
Aguirre GK
影响因子：
2.5
作者：
Aghajari, Sara;Vinke, Louis N.;Ling, Sam
通讯作者：
Ling, Sam