Enhanced visual artistry and high accuracy of visual numerosity representation after left prefrontal damage
Enhanced visual artistry and high accuracy of visual numerosity representation after left prefrontal damage
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左前额叶损伤后视觉艺术性增强，视觉数字表示的准确性提高
DOI：
10.1016/j.neuropsychologia.2014.02.022
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发表时间：
2014
期刊：
影响因子：
2.6
通讯作者：
Motoichiro Kato
中科院分区：
文献类型：
--
作者：
Keisuke Takahata;Fumie Saito;Taro Muramatsu;Makiko Yamada;Joichiro Shirahase;Hajime Tabuchi1;Tetsuya Suhara;Masaru Mimura;Motoichiro Kato
在过去的二十年里，有证据表明，由于局灶性前额叶损伤，绘画和绘画技能得到了提高。令人特别感兴趣的是，这些患者创作的大多数艺术品都是高度逼真的，但这种现象背后的机制仍有待了解。我们的假设是，现实主义倾向的增强与视觉数字表征的准确性有关，这已被证明主要通过右顶叶功能来调节。在这里，我们报告一例左额叶中风，患者在脑损伤后表现出写实绘画艺术技能的增强。我们调查了患者׳S的认知、功能和审美特征，包括视觉艺术性和视觉数字表征。神经心理测试显示中风后执行功能受损。尽管如此，与现实主义相关的Patient׳S的视觉艺术性在大脑损伤的整个过程中都得到了相当大的提升，专业艺术评论家对这些画的盲目评价就证明了这一点。在视觉数字认知任务上，与年龄匹配的健康对照组相比，患者表现出更高的表现。这些结果与右侧顶叶皮质，包括楔前叶和顶叶内沟的血流灌注增加平行。我们的数据为局灶性前额叶病变导致艺术风格改变的潜在机制提供了新的见解。
Over the last two decades, evidence of enhancement of drawing and painting skills due to focal prefrontal damage has accumulated. It is of special interest that most artworks created by such patients were highly realistic ones, but the mechanism underlying this phenomenon remains to be understood. Our hypothesis is that enhanced tendency of realism was associated with accuracy of visual numerosity representation, which has been shown to be mediated predominantly by right parietal functions. Here, we report a case of left prefrontal stroke, where the patient showed enhancement of artistic skills of realistic painting after the onset of brain damage. We investigated cognitive, functional and esthetic characteristics of the patient׳s visual artistry and visual numerosity representation. Neuropsychological tests revealed impaired executive function after the stroke. Despite that, the patient׳s visual artistry related to realism was rather promoted across the onset of brain damage as demonstrated by blind evaluation of the paintings by professional art reviewers. On visual numerical cognition tasks, the patient showed higher performance in comparison with age-matched healthy controls. These results paralleled increased perfusion in the right parietal cortex including the precuneus and intraparietal sulcus. Our data provide new insight into mechanisms underlying change in artistic style due to focal prefrontal lesion.