Departamento de Psicobiología, Facultad de Psicología, Universidad Complutense de Madrid, Madrid, Spain.
Exp Brain Res. 2013 Jun;227(3):343-53. doi: 10.1007/s00221-013-3514-4. Epub 2013 Apr 19.
Grapheme-color synesthesia is a neurological phenomenon in which viewing achromatic letters/numbers leads to automatic and involuntary color experiences. In this study, voxel-based morphometry analyses were performed on T1 images and fractional anisotropy measures to examine the whole brain in associator grapheme-color synesthetes. These analyses provide new evidence of variations in emotional areas (both at the cortical and subcortical levels), findings that help understand the emotional component as a relevant aspect of the synesthetic experience. Additionally, this study replicates previous findings in the left intraparietal sulcus and, for the first time, reports the existence of anatomical differences in subcortical gray nuclei of developmental grapheme-color synesthetes, providing a link between acquired and developmental synesthesia. This empirical evidence, which goes beyond modality-specific areas, could lead to a better understanding of grapheme-color synesthesia as well as of other modalities of the phenomenon.
文字-颜色联觉是一种神经现象，其中看到非彩色的字母/数字会导致自动和无意识的颜色体验。在这项研究中，对联想文字-颜色联觉者的 T1 图像和分数各向异性测量值进行了基于体素的形态测量学分析。这些分析提供了情感区域（皮质和皮质下水平）变化的新证据，这些发现有助于理解情感成分作为联觉体验的一个相关方面。此外，这项研究复制了先前在左顶内沟中的发现，并且首次报告了发展性文字-颜色联觉者皮质下灰色核中的解剖差异的存在，为获得性和发展性联觉之间建立了联系。这种超越特定感觉模式的经验证据可以更好地理解文字-颜色联觉以及现象的其他感觉模式。
