Perceptually unidentifiable stimuli influence cortical processing and behavioral performance.

Perceptually unidentifiable stimuli influence cortical processing and behavioral performance.
复制标题

知觉上无法识别的刺激影响皮层加工和行为表现。

DOI:
10.1038/s41467-020-19848-w
复制
发表时间:
2020-11-30
影响因子:
16.6
通讯作者:
Dragoi V
Dragoi V
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Pojoga SA;Kharas N;Dragoi V

文献摘要

参考文献

相似文献

我们的日常行为受到有意识和无意识过程的动态影响。尽管在过去的几十年里,意识经验的神经基础已经得到了广泛的研究,但无意识信息如何影响神经电路和行为仍然是未知的。在这里,我们记录了猕猴初级视觉皮质(V1)中的神经元群体,发现在缺乏意识的情况下重复出现的感知上无法识别的刺激由神经群体以一种便于它们未来在行为任务中进行处理的方式进行编码。这种暴露增加了刺激的敏感性和细胞群体中编码的信息,即使动物不知道刺激的身份。这一现象与Hebbian机制是一致的,这是功能连接性增加的基础,特别是对于由亚阈值刺激激活的神经元。这种形式的无监督适应可能构成一种退化的前注意系统,即使在感觉输入在感知上不可见的情况下,也只使用刺激发生的频率来改变刺激表征。感知上无法识别的刺激在大脑视觉皮质中被编码,以便于它们未来在任务环境中的处理。这种形式的启动可能构成一种前注意机制,仅使用刺激发生的频率来改变刺激表征,即使感觉输入在感知上是不可见的。
Our daily behavior is dynamically influenced by conscious and unconscious processes. Although the neural bases of conscious experience have been extensively investigated over the past several decades, how unconscious information impacts neural circuitry and behavior remains unknown. Here, we recorded populations of neurons in macaque primary visual cortex (V1) to find that perceptually unidentifiable stimuli repeatedly presented in the absence of awareness are encoded by neural populations in a way that facilitates their future processing in the context of a behavioral task. Such exposure increases stimulus sensitivity and information encoded in cell populations, even though animals are unaware of stimulus identity. This phenomenon is consistent with a Hebbian mechanism underlying an increase in functional connectivity specifically for the neurons activated by subthreshold stimuli. This form of unsupervised adaptation may constitute a vestigial pre-attention system using the mere frequency of stimulus occurrence to change stimulus representations even when sensory inputs are perceptually invisible. Perceptually unidentifiable stimuli are encoded in the visual cortex, such as to facilitate their future processing in a task context. This form of priming may constitute a pre-attention mechanism using the mere frequency of stimulus occurrence to change stimulus representations, even when sensory inputs are perceptually invisible.
DOI: 10.1038/nature06563
发表时间: 2008-03-13
期刊: NATURE
影响因子: 64.8
作者:
Gutnisky, Diego A.;Dragoi, Valentin
通讯作者: Dragoi, Valentin
DOI: 10.1016/j.neuron.2012.08.029
发表时间: 2012-11-08
期刊: Neuron
影响因子: 16.2
作者:
Hansen BJ;Chelaru MI;Dragoi V
通讯作者: Dragoi V
DOI: 10.1038/nn900
发表时间: 2002-09-01
影响因子: 25
作者:
Dragoi, V;Sharma, J;Sur, M
通讯作者: Sur, M
DOI: 10.1073/pnas.96.4.1790
发表时间: 1999-02-16
影响因子: 11.1
作者:
Bar, M;Biederman, I
通讯作者: Biederman, I
DOI: 10.1038/26967
发表时间: 1998-10-08
期刊: NATURE
影响因子: 64.8
作者:
Dehaene, S;Naccache, L;Le Bihan, D
通讯作者: Le Bihan, D