Horel J A
Department of Anatomy, SUNY Health Sciences Center, Syracuse 13210, USA.
Behav Brain Res. 1996 Apr;76(1-2):199-214. doi: 10.1016/0166-4328(95)00196-4.
We use cold to reversibly suppress cortical areas involved in visual perception, learning and retrieval and we found a localization of functions essential for performance of delayed match-to-sample (DMS) in anterior ventral temporal cortex, we call ventral TE (TEv). We also found a visual input for this area that is separate from the one going to the heart of inferotemporal cortex and suppressing this input also impairs performance of DMS. Suppressing the dorsal half of TE (TEd) disrupts retrieval of some, but not all complex images, and different images are disrupted in different animals. This variability within and between animals is extreme, with perfect performance on some complex images and below chance on others. We suggested that TEd represents some, but not all elements of the images. In attempting to discover what those elements might be, we found that TEd suppression disrupts the perception of small figures, but not the larger figures that they compose. We also found that it impaired the discrimination and matching of colors, without impairing the ability to detect and differentiate hues. We proposed that TEd represents the details and colors of things, but not global figures. Also, complex objects do not have a representation in one area, rather its representation involves the entire visual system, including TE with different elements of the image represented in different parts.
我们利用低温可逆地抑制参与视觉感知、学习和记忆提取的皮质区域，并且我们发现腹侧颞叶前部皮质中对于延迟匹配样本（DMS）任务表现至关重要的功能定位，我们将其称为腹侧颞下回（TEv）。我们还发现该区域存在一条独立于通向颞下皮质核心区域的视觉输入通路，抑制这条输入通路也会损害DMS任务的表现。抑制颞下回的背侧部分（TEd）会干扰部分而非全部复杂图像的记忆提取，并且不同动物中受干扰的图像也不同。动物个体内部以及个体之间的这种变异性极大，有些复杂图像的表现完美，而有些则低于随机水平。我们认为TEd代表了图像的部分而非全部元素。在试图弄清楚这些元素可能是什么时，我们发现抑制TEd会干扰小图形的感知，但不会干扰由它们组成的大图形的感知。我们还发现这会损害颜色的辨别和匹配能力，但不会损害检测和区分色调的能力。我们提出TEd代表事物的细节和颜色，而非整体图形。此外，复杂物体并非在一个区域中存在单一表征，而是其表征涉及整个视觉系统，包括颞下回，图像的不同元素在不同部分进行表征。
