Rotational remapping in human spatial memory during eye and head motion
Rotational remapping in human spatial memory during eye and head motion
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DOI：
10.1523/jneurosci.22-01-j0006.2002
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发表时间：
2002-01-01
影响因子：
5.3
通讯作者：
Crawford, JD
中科院分区：
文献类型：
--
作者：
Medendorp, WP;Smith, MA;Crawford, JD
大脑使用视觉和其他感官来计算物体相对于身体的位置，然后当身体移动时必须更新这些位置。这种内部更新在几何上有多复杂？有人建议，当眼睛或头部转动时，更新只是以公共向量统一地移位所有对象的存储位置。对于水平和垂直转弯，均匀的移动通常会近似于物体在被摄体前面的位置的真实变化。但对于扭转旋转，平移是不够的：准确的更新将需要更精确的几何重新映射，不是平移，而是通过与眼睛在空间中的旋转相反来旋转存储的位置。在这里，我们让受试者在扭转头部旋转后，对记忆中的目标进行眼跳。它们的精确度表明，空间更新在扭转维度上起作用，并通过旋转而不是移位来操作。
The brain uses vision and other senses to compute the locations of objects relative to the body, and then must update these locations when the body moves. How geometrically sophisticated is this internal updating? It has been suggested that updating simply shifts the stored locations of all objects uniformly, by a common vector, when the eye or head turns. For horizontal and vertical turns, a uniform shift would often approximate the real changes in location of objects in front of the subject. But for torsional rotations, a shift would be inadequate: accurate updating would call for a more geometrically exact remapping, not shifting but rotating the stored locations through the inverse of the rotation of the eye in space. Here we asked human subjects to make eye saccades to remembered targets after torsional head rotations. Their accuracy showed that spatial updating works in the torsional dimension and operates by rotation rather than shifting.