Howard R J, ffytche D H, Barnes J, McKeefry D, Ha Y, Woodruff P W, Bullmore E T, Simmons A, Williams S C, David A S, Brammer M
Department of Old Age Psychiatry, Institute of Psychiatry, DeCrespigny Park, Camberwell, London, UK.
Neuroreport. 1998 Apr 20;9(6):1019-23. doi: 10.1097/00001756-199804200-00012.
We report two functional magnetic resonance imaging experiments which reveal similarities and differences between perceptual and imaginal networks within the single visual submodality of colour. The first experiment contrasted viewing of a coloured and grey-scale Mondrian display, while the second contrasted a relative colour judgement with a spatial task and required the generation of mental images. Our results show that colour perception activates the posterior fusiform gyrus bilaterally (area V4), plus right-sided anterior fusiform and lingual gyri, striate cortex (area V1), and the left and right insula. Colour imagery activated right anterior fusiform gyrus, left insula, right hippocampus and parahippocampal gyrus, but not V4 or V1. The findings reconcile neurological case studies suggesting a double dissociation between deficits in colour imagery and perception and point to anterior fusiform, parahippocampal gyri and hippocampus as the location for stored representations of coloured objects.
我们报告了两项功能磁共振成像实验，这些实验揭示了在单一视觉子模态颜色内，感知网络和想象网络之间的异同。第一个实验对比了彩色和灰度蒙德里安展示的观看情况，而第二个实验则将相对颜色判断与空间任务进行了对比，并要求生成心理图像。我们的结果表明，颜色感知双侧激活后梭状回（V4区），以及右侧前梭状回和舌回、纹状皮质（V1区），还有左右脑岛。颜色想象激活了右侧前梭状回、左侧脑岛、右侧海马体和海马旁回，但未激活V4或V1。这些发现调和了神经病例研究，这些研究表明颜色想象和感知缺陷之间存在双重分离，并指出前梭状回、海马旁回和海马体是彩色物体存储表征的位置。
