A somatotopic map of vibrissa motion direction within a barrel column
A somatotopic map of vibrissa motion direction within a barrel column
复制标题
DOI：
10.1038/nn1671
复制
发表时间：
2006-04-01
影响因子：
25
通讯作者：
Moore, CI
中科院分区：
文献类型：
--
作者：
Andermann, ML;Moore, CI
大多数哺乳动物拥有高分辨率的视觉感知，初级视觉皮层包含精细尺度、相互关联的特征表示（例如方向和眼优势）。老鼠缺乏精确的视觉，但它们的触须感觉系统提供了精确的触觉方式，包括初级体感皮层中与触须相关的“桶”柱。在这里，我们使用新的全向多触须刺激器检查了方向偏好和体位的柱下组织。我们发现了一个与体位系统相关的方向图，这样神经元就会被调整为向其首选的周围触须运动。该子桶柱方向图展示了从第四层到第二/第三层的紧急细化。这些数据表明，多种感官特征的联合处理是高分辨率感官系统的共同特性。
Most mammals possess high-resolution visual perception, with primary visual cortices containing fine-scale, inter-related feature representations (for example, orientation and ocular dominance). Rats lack precise vision, but their vibrissa sensory system provides a precise tactile modality, including vibrissa-related 'barrel' columns in primary somatosensory cortex. Here, we examined the subcolumnar organization of direction preference and somatotopy using a new omni-directional, multi-vibrissa stimulator. We discovered a direction map that was systematically linked to somatotopy, such that neurons were tuned for motion toward their preferred surround vibrissa. This sub-barrel column direction map demonstrated an emergent refinement from layer IV to layer II/III. These data suggest that joint processing of multiple sensory features is a common property of high-resolution sensory systems.