Barne Louise C, de Lange Floris P, Cravo André M
Centro de Matemática, Computação e Cognição, Universidade Federal do ABC (UFABC), São Bernardo do Campo, SP, Brazil.
Donders Institute for Brain, Cognition and Behaviour, Radboud University, the Netherlands.
Cortex. 2020 Nov;132:250-257. doi: 10.1016/j.cortex.2020.08.017. Epub 2020 Sep 10.
Spatial attention can modulate behavioural performance and is associated with several electrophysiological markers. In this study, we used multivariate pattern analysis in electrophysiology data to investigate the effects of covert spatial attention on the quality of stimulus processing and its underlying mechanisms. Our results show that covert spatial attention led to (i) an anticipatory alpha power desynchronization; (ii) enhanced stimuli identity information. Moreover, we found that alpha power fluctuations in anticipation of the relevant stimuli boosted and prolonged the coding of stimulus identity.
空间注意力可以调节行为表现，并与多种电生理指标相关。在本研究中，我们运用多变量模式分析方法处理电生理数据，以探究隐蔽空间注意力对刺激加工质量及其潜在机制的影响。我们的研究结果表明，隐蔽空间注意力导致：（i）预期性α波功率去同步化；（ii）增强了刺激身份信息。此外，我们发现，对相关刺激的预期过程中α波功率波动增强并延长了刺激身份的编码。
