Kiorpes Lynne, Bassin Sarah A
Center for Neural Science, New York University, New York 10003, USA.
Vis Neurosci. 2003 Sep-Oct;20(5):567-75. doi: 10.1017/s0952523803205101.
Studies of visual development show that basic metrics of visual development such as spatial resolution develop over the first 6-9 months in monkeys and over the first 6 or so years in humans. However, more complex visual functions may develop over different, or more protracted, time courses. To address the question of whether global perceptual processing is linked to or otherwise dependent on the development of basic spatial vision, we studied the development of contour integration, a global perceptual task, in comparison to that of grating acuity in macaque monkeys. We find that contour integration develops substantially later than acuity. Contour integration begins to develop at 5-6 months, near the time that acuity development is complete and continues to mature well into the second postnatal year. We discuss this later development in terms poor central efficiency and consider the relevant anatomy and physiology of the developing visual system. We conclude that contour integration is not likely to be limited by the same mechanisms that are permissive to acuity development, and may instead reflect the emergence of function central to V1.
视觉发育研究表明，视觉发育的基本指标，如空间分辨率，在猴子出生后的前6至9个月以及人类出生后的前6年左右逐渐发展。然而，更复杂的视觉功能可能在不同的或更长的时间进程中发展。为了解决整体感知处理是否与基本空间视觉的发展相关或依赖于基本空间视觉发展的问题，我们研究了猕猴轮廓整合（一种整体感知任务）的发展，并与光栅敏锐度的发展进行了比较。我们发现轮廓整合的发展比敏锐度要晚得多。轮廓整合在5至6个月时开始发展，此时敏锐度发育已接近完成，并在出生后的第二年仍持续成熟。我们从较差的中枢效率角度讨论了这种较晚的发展，并考虑了发育中的视觉系统的相关解剖学和生理学。我们得出结论，轮廓整合不太可能受到与允许敏锐度发展相同机制的限制，相反，它可能反映了V1核心功能的出现。
