Critical period plasticity matches binocular orientation preference in the visual cortex.

Critical period plasticity matches binocular orientation preference in the visual cortex.
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DOI:
10.1016/j.neuron.2010.01.002
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发表时间:
2010-01-28
期刊:
影响因子:
16.2
通讯作者:
Cang, Jianhua
Cang, Jianhua
中科院分区:
医学1区
文献类型:
--
作者:
Wang, Bor-Shuen;Sarnaik, Rashmi;Cang, Jianhua

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在生命早期的关键时期,视觉操作可以引起视觉皮层中眼优势的变化。然而,关键期可塑性在正常发育中的作用尚不清楚。在这里,我们表明,在这个时间窗口的开始,在小鼠中的个别皮层细胞的首选方向是不匹配的,通过两只眼睛和不匹配的减少,并达到成人水平的时期结束。在此期间,视觉经验的退化不可逆地阻止了定向偏好的双眼匹配,但在成年期没有影响。与眼优势可塑性相似,出生后长期的视觉剥夺可使双眼匹配的关键期延迟。这些结果表明,活动依赖性的变化引起的正常视觉经验,在充分研究的关键时期服务于匹配眼睛特定的输入在皮层,从而揭示了生理作用的关键期可塑性在正常发育。
Changes of ocular dominance in the visual cortex can be induced by visual manipulations during a critical period in early life. However, the role of critical period plasticity in normal development is unknown. Here we show that at the onset of this time window, the preferred orientations of individual cortical cells in the mouse are mismatched through the two eyes and the mismatch decreases and reaches adult levels by the end of the period. Deprivation of visual experience during this period irreversibly blocks the binocular matching of orientation preference, but has no effect in adulthood. The critical period of binocular matching can be delayed by long-term visual deprivation from birth, like that of ocular dominance plasticity. These results demonstrate that activity-dependent changes induced by normal visual experience during the well-studied critical period serve to match eye-specific inputs in the cortex, thus revealing a physiological role for critical period plasticity during normal development.
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