Ramp-shaped neural tuning supports graded population-level representation of the object-to-scene continuum.
Ramp-shaped neural tuning supports graded population-level representation of the object-to-scene continuum.
复制标题
坡道形神经调节支持对象对现场连续体的分级人口级表示。
DOI：
10.1038/s41598-022-21768-2
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发表时间：
2022-10-27
影响因子：
4.6
通讯作者：
Konkle, Talia
中科院分区：
文献类型：
--
作者：
Park, Jeongho;Josephs, Emilie;Konkle, Talia
我们可以很容易地感觉到图片中描绘的空间尺度，无论它是一个小空间(例如，椅子的特写)还是更大的空间(例如，整个教室)。人类的视觉系统如何编码这个连续的维度？在这里，我们研究了所描绘的空间尺度的潜在神经编码，通过检查体素调节和大脑反应的地形图组织。我们通过构建虚拟室内环境来创建自然主义但又经过精心控制的刺激，并渲染了一系列快照，以便在中央对象的近距离视图和整个环境的远距离视图(对象到场景的连续体)之间流畅地采样。使用功能性磁共振成像来测量人类大脑对每个位置的反应。我们没有找到证据表明大脑皮质上的物体到场景连续体是平滑的地形图。取而代之的是，我们观察到具有相反坡形轮廓的大片皮质，对对象到场景连续体的一端或另一端的响应最高，一小部分区域显示出对中等尺度视图的弱调谐。然而，当我们考虑整个腹侧枕颞叶皮质的种群编码时，我们发现对象到场景的连续体的平滑和线性表示。我们的结果共同表明，所描述的空间尺度信息以参数形式编码在整个枕颞叶腹侧皮质的大规模人口代码中。
We can easily perceive the spatial scale depicted in a picture, regardless of whether it is a small space (e.g., a close-up view of a chair) or a much larger space (e.g., an entire class room). How does the human visual system encode this continuous dimension? Here, we investigated the underlying neural coding of depicted spatial scale, by examining the voxel tuning and topographic organization of brain responses. We created naturalistic yet carefully-controlled stimuli by constructing virtual indoor environments, and rendered a series of snapshots to smoothly sample between a close-up view of the central object and far-scale view of the full environment (object-to-scene continuum). Human brain responses were measured to each position using functional magnetic resonance imaging. We did not find evidence for a smooth topographic mapping for the object-to-scene continuum on the cortex. Instead, we observed large swaths of cortex with opposing ramp-shaped profiles, with highest responses to one end of the object-to-scene continuum or the other, and a small region showing a weak tuning to intermediate scale views. However, when we considered the population code of the entire ventral occipito-temporal cortex, we found smooth and linear representation of the object-to-scene continuum. Our results together suggest that depicted spatial scale information is encoded parametrically in large-scale population codes across the entire ventral occipito-temporal cortex.
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影响因子：
3.2
作者：
Lescroart MD;Stansbury DE;Gallant JL
通讯作者：
Gallant JL
影响因子：
25
作者：
Freiwald, Winrich A.;Tsao, Doris Y.;Livingstone, Margaret S.
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Livingstone, Margaret S.
影响因子：
64.8
作者：
Epstein, R;Kanwisher, N
通讯作者：
Kanwisher, N
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56.9
作者：
BLAKEMOR.C;SUTTON, P
通讯作者：
SUTTON, P
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4.1
作者：
Calder, Andrew J.;Jenkins, Rob;Clifford, Colin W. G.
通讯作者：
Clifford, Colin W. G.