青少年在两小时单眼剥夺后的短期恒常视觉神经可塑性
Bao N Nguyen1, Rekha Srinivasan1, Allison M McKendrick1,2,3
1Department of Optometry and Vision Sciences, The University of Melbourne, Parkville, Victoria, Australia.
IBRO neuroscience reports
|June 30, 2023
概括
青少年和年轻人表现出类似的视觉皮质可塑性,当一个眼睛暂时修补. 这表明,恒常性可塑性有效地弥补了青春期减少的视觉输入.
科学领域:
- 神经科学是一个神经科学.
- 发育神经科学的发展神经科学.
- 视觉神经科学是一种神经科学.
背景情况:
- 视觉系统中的恒常性可塑性是一种补偿机制,在暂时视觉剥夺后,被剥夺的眼睛变得更加主导.
- 之前的研究表明,胺黄油酸 (GABA) 水平降低与较强的眼睛主导转移之间存在联系.
- 在GABAergic系统中与年龄相关的变化表明青春期可能是视觉可塑性的关键时期.
研究的目的:
- 调查青少年和年轻成年人双眼对抗的短期视觉剥夺影响.
- 为了确定视觉皮层的恒常性可塑性是否在青春期建立和功能.
- 评估双眼对抗作为体验依赖视觉皮质可塑性的行为代理.
主要方法:
- 招募了24名青少年 (10-15岁) 和23名年轻成年人 (20-25岁).
- 在单眼修补 (视觉剥夺) 两小时之前和之后测量双眼对抗.
- 分析了眼睛主导地位和竞争动态的变化.
主要成果:
- 与成年人相比,青少年在基线时表现出更多的混合感知和更快的切换倾向.
- 青少年和成年人都显示,在补丁后,剥夺眼睛主导地位的增加类似.
- 拼接并没有改变到第一个开关的时间或混合感知的发生.
结论:
- 双眼对抗是青少年视觉皮层可塑性的有效行为代理,类似于成年人.
- 恒常性可塑性有效地弥补了青春期暂时的视觉输入减少.
- 视觉系统在青春期显示出已建立的补偿性可塑性机制.
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