Killian Nathaniel J, Potter Steve M, Buffalo Elizabeth A
Department of Neurosurgery, Massachusetts General Hospital, Boston, MA 02114; Yerkes National Primate Research Center, Atlanta, GA 30329; Laboratory for Neuroengineering, Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332;
Laboratory for Neuroengineering, Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332;
Proc Natl Acad Sci U S A. 2015 Dec 22;112(51):15743-8. doi: 10.1073/pnas.1417059112. Epub 2015 Dec 7.
We recently demonstrated that position in visual space is represented by grid cells in the primate entorhinal cortex (EC), suggesting that visual exploration of complex scenes in primates may employ signaling mechanisms similar to those used during exploration of physical space via movement in rodents. Here, we describe a group of saccade direction (SD) cells that encode eye movement information in the monkey EC during free-viewing of complex images. Significant saccade direction encoding was found in 20% of the cells recorded in the posterior EC. SD cells were generally broadly tuned and two largely separate populations of SD cells encoded future and previous saccade direction. Some properties of these cells resemble those of head-direction cells in rodent EC, suggesting that the same neural circuitry may be capable of performing homologous spatial computations under different exploratory contexts.
我们最近证明,灵长类动物内嗅皮层(EC)中的网格细胞可表征视觉空间中的位置,这表明灵长类动物对复杂场景的视觉探索可能采用与啮齿动物通过移动探索物理空间时所使用的类似信号机制。在此,我们描述了一组扫视方向(SD)细胞,它们在猴子自由观看复杂图像期间在其EC中编码眼球运动信息。在后侧EC中记录的细胞中有20%发现有显著的扫视方向编码。SD细胞通常具有广泛的调谐,并且两个大致分开的SD细胞群体编码未来和先前的扫视方向。这些细胞的一些特性类似于啮齿动物EC中的头部方向细胞,这表明相同的神经回路可能能够在不同的探索背景下执行同源的空间计算。