Color perception profiles in central achromatopsia
Color perception profiles in central achromatopsia
复制标题
中央色盲的颜色感知概况
作者：
M. Rizzo;V. Smith;J. Pokorny;A. Damasio
中枢性色盲是一种由视觉联合皮层损伤引起的色觉障碍。它的心理物理基础仍然不明确。我们报告了我们试图沿着颜色空间的关键维度表征缺陷，利用相同的标准化任务，允许视网膜锥缺陷患者的详细资料。我们研究了两个病人。患者1的结果显示，感知颜色空间沿着红-绿（R-G）和短波长敏感锥（S-锥）维度塌陷，但沿着非彩色维度的辨别力相对保留。其他观察结果表明，缺陷取决于目标尺寸，并且与颜色不同的表面和光源效应（例如，透明度）的处理是完整的。患者2表现出不太严重的颜色处理缺陷，涉及视网膜S-锥细胞产生的信号，尽管也存在E-G缺陷。在这两个病人的配置文件表明，中央全色盲包括一系列的颜色处理障碍与不同的心理物理特征。
Central achromatopsia is an impairment of color perception caused by damage to the visual association cortex. Its psychophysical underpinnings remain poorly defined. We report our attempt to characterize the defect along critical dimensions of color space, taking advantage of the same standardized tasks that allow detailed profiles in patients with retinal cone defects. We studied two patients. The results in patient 1 showed that perceptual color space was collapsed along the red-green (R-G) and short-wavelength-sensitive cone (S-cone) dimensions but that discriminations along achromatic dimensions were relatively preserved. Additional observations showed that the defect was dependent on target size, and that processing of surface and light source effects that differ from color (eg, transparency) was intact. Patient 2 showed a less severe color processing defect involving signals arising from the S-cones of the retina, although an E-G defect was also present. The profiles in these two patients demonstrate that central achromatopsia encompasses a range of color processing impairments with varied psychophysical characteristics.
影响因子：
4.2
作者：
SMITH, VC;POKORNY, J;PASS, AS
通讯作者：
PASS, AS