Push-pull training reduces foveal sensory eye dominance within the early visual channels.
Push-pull training reduces foveal sensory eye dominance within the early visual channels.
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DOI：
10.1016/j.visres.2011.06.005
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发表时间：
2012-05-15
期刊：
影响因子：
1.8
通讯作者：
Ooi, Teng Leng
中科院分区：
文献类型：
--
作者：
Xu, Jingping P.;He, Zijiang J.;Ooi, Teng Leng
关键词：
采用推拉训练方案来减少中央凹区域的感觉眼优势。训练方案是通过对双眼正交光栅刺激，诱导弱眼成为优势眼，抑制强眼成为优势眼。我们使用四对正交光栅（0°/90°，90°/0°，45°/135°和135°/45°）在3 cpd下进行训练，以影响四个训练方向（0°，45°，90°和135°）的眼间抑制相互作用。经过10天的训练，我们发现在训练方向和其他两个未训练方向（22.5°和67.5°）上有显著的学习效果（感觉眼优势降低）。这表明四对定向训练刺激足以在任何其他定向下产生学习效果。学习效果几乎完全转移是由于训练和未训练的方向足够接近，从而落在早期视觉皮质神经元的相同方向调节功能中（~37.5°）。在相同的特征通道内应用相同的学习迁移概念，我们还发现对未训练的空间频率（6 cpd）有很大的迁移效应，它比训练的空间频率（3 cpd）高1个八度。此外，我们发现，在推挽训练后，立体视功能得到了改善，两眼之间的竞争能力也得到了提高。我们的数据分析表明，这些改善与训练后感官眼优势的减少有关，即由于更平衡的眼间抑制。我们还发现，学习效果（降低SED和立体阈值）可以在推拉训练结束后保留一年多。
A push-pull training protocol is applied to reduce sensory eye dominance in the foveal region. The training protocol consists of cueing the weak eye to force it to become dominant while the strong eye is suppressed when a pair of dichoptic orthogonal grating stimulus is subsequently presented to it. We trained with four pairs of dichoptic orthogonal gratings (0°/90°, 90°/0°, 45°/135° and 135°/45° at 3 cpd) to affect the interocular inhibitory interaction tuned to the four trained orientations (0°, 45°, 90° and 135°). After a 10-day training session, we found a significant learning effect (reduced sensory eye dominance) at the trained orientations as well as at two other untrained orientations (22.5° and 67.5°). This suggests that the four pairs of oriented training stimuli are sufficient to produce a learning effect at any other orientation. The nearly complete transfer of the learning effect across orientation is attributed to the fact that the trained and untrained orientations are close enough to fall in the same orientation tuning function of the early visual cortical neurons (~37.5°). Applying the same notion of transfer of learning within the same feature channel, we also found a large transfer effect to an untrained spatial frequency (6 cpd), which is 1 octave higher than the trained spatial frequency (3 cpd). Furthermore, we found that stereopsis is improved, as is the competitive ability between the two eyes, after the push-pull training. Our data analysis suggests that these improvements are correlated with the reduced sensory eye dominance after the training, i.e., due to a more balanced interocular inhibition. We also found that the learning effect (reduced SED and stereo threshold) can be retained for more than a year after the termination of the push-pull training.
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