Tracking the eye non-invasively: simultaneous comparison of the scleral search coil and optical tracking techniques in the macaque monkey.

Tracking the eye non-invasively: simultaneous comparison of the scleral search coil and optical tracking techniques in the macaque monkey.
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非侵入性跟踪眼睛:同时比较猕猴中的巩膜搜索线圈和光学跟踪技术。

DOI:
10.3389/fnbeh.2012.00049
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发表时间:
2012
影响因子:
3
通讯作者:
Newsome WT
Newsome WT
中科院分区:
医学3区
文献类型:
--
作者:
Kimmel DL;Mammo D;Newsome WT

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从人类感知到灵长类动物的神经生理学,监测眼睛位置对于研究视觉、注意力、眼球运动控制和行为至关重要。两种精确测量眼睛位置的主要技术--长期嵌入巩膜的搜索线圈和最近的光学跟踪技术--在不同的实验室中被使用,但没有发表的研究比较这两种方法在同一灵长类动物中的性能。在这里,我们比较了两种流行的系统-C-N-C Engineering的巩膜嵌入搜索线圈和SR Research的Eyelink 1000光学系统-通过在猕猴执行简单的眼球运动任务时同时记录猕猴的同一只眼睛。我们发现这两个系统之间有广泛的一致性,特别是在注视过程中的位置准确性、眼跳幅度的测量、注视眼跳的检测以及对不同试验眼位细微变化的敏感度方面。尽管如此,某些差异仍然存在,特别是眼跳峰值速度升高、后眼跳振铃、亮度变化对报告位置的影响以及光学系统中更大的样本之间的差异。我们的研究表明,光学性能现在可以与搜索线圈相媲美,这使得光学系统适合许多应用,如果不是大多数应用的话。这一发现具有重要意义,特别是对于动物受试者,因为光学系统不需要植入和修复眼睛周围的搜索线圈的侵入性手术。我们的数据还允许实验室在人类受试者中使用光学系统来评估该技术在各自应用中的优势和局限性。
From human perception to primate neurophysiology, monitoring eye position is critical to the study of vision, attention, oculomotor control, and behavior. Two principal techniques for the precise measurement of eye position—the long-standing sclera-embedded search coil and more recent optical tracking techniques—are in use in various laboratories, but no published study compares the performance of the two methods simultaneously in the same primates. Here we compare two popular systems—a sclera-embedded search coil from C-N-C Engineering and the EyeLink 1000 optical system from SR Research—by recording simultaneously from the same eye in the macaque monkey while the animal performed a simple oculomotor task. We found broad agreement between the two systems, particularly in positional accuracy during fixation, measurement of saccade amplitude, detection of fixational saccades, and sensitivity to subtle changes in eye position from trial to trial. Nonetheless, certain discrepancies persist, particularly elevated saccade peak velocities, post-saccadic ringing, influence of luminance change on reported position, and greater sample-to-sample variation in the optical system. Our study shows that optical performance now rivals that of the search coil, rendering optical systems appropriate for many if not most applications. This finding is consequential, especially for animal subjects, because the optical systems do not require invasive surgery for implantation and repair of search coils around the eye. Our data also allow laboratories using the optical system in human subjects to assess the strengths and limitations of the technique for their own applications.
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发表时间: 1996-07-01
期刊: PSYCHOPHYSIOLOGY
影响因子: 3.7
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