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首页> 外文期刊>Current Biology: CB >Brief periods of monocular deprivation disrupt ocular balance in human adult visual cortex
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Brief periods of monocular deprivation disrupt ocular balance in human adult visual cortex

机译：短暂的单眼剥夺会破坏人类成人视皮层的眼平衡

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摘要

Neuroplasticity is a fundamental property of the developing mammalian visual system, with residual potential in adult human cortex [1]. A short period of abnormal visual experience (such as occlusion of one eye) before closure of the critical period has dramatic and permanent neural consequences, reshaping visual cortical organization in favour of the non-deprived eye [2] and [3] . We used binocular rivalry [4] — a sensitive probe of neural competition — to demonstrate that adult human visual cortex retains a surprisingly high degree of neural plasticity, with important perceptual consequences. We report that 150 minutes of monocular deprivation strongly affects the dynamics of binocular rivalry, unexpectedly causing the deprived eye to prevail in conscious perception twice as much as the non-deprived eye, with significant effects for up to 90 minutes. Apparent contrast of stimuli presented to the deprived eye was also increased, suggesting that the deprivation acts by up-regulation of cortical gain-control mechanisms of the deprived eye. The results suggest that adult visual cortex retains a good deal of plasticity that could be important in reaction to sensory loss.
机译：神经可塑性是发展中的哺乳动物视觉系统的基本属性，在成年人类皮层中具有残留潜力[1]。在关键时期关闭之前，短暂的异常视觉体验（例如一只眼睛的闭塞）会产生剧烈的永久性神经后果，从而重塑视觉皮层组织，从而有利于不被剥夺的眼睛[2]和[3]。我们使用了双眼竞争[4]（一种神经竞争的灵敏探针）来证明成年人的视觉皮层具有令人惊讶的高度神经可塑性，并具有重要的知觉效果。我们报告说，单眼剥夺150分钟会强烈影响双眼竞争的动态，出乎意料地导致剥夺的眼睛在有意识的感知中占优势，是非剥夺的眼睛的两倍，最多可持续90分钟。被剥夺的眼睛受到的刺激的明显对比也增加了，这表明剥夺是通过上调剥夺眼睛的皮质增益控制机制来实现的。结果表明，成人视觉皮层保留了大量可塑性，这对感觉丧失的反应可能很重要。

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