The object-context relationship and valence are two important stimulus attributes that affect visual perception. Although previous studies reveal how these two factors affect visual perception individually, the interplay between valence with congruent or incongruent object-context associations during visual perception is explored scarcely. Further, what is perceived, is affected by the intrinsic state of the brain at the moment of appearance of the stimulus which could be assessed by EEG microstates. Hence, the current study was designed to explore how the pre-stimulus EEG microstate influences the perception of emotional congruent and incongruent stimuli as well as perceptual reversals and stability during an intermittent binocular rivalry. Results revealed the association of specific pre-stimulus microstates with the perception of neutral and negative congruent stimuli as well as perceptual reversals and stability. Electrical neuroimaging of these microstates showed higher activation in the precuneus and middle occipital gyrus preceding the perception of neutral congruent stimuli and lingual gyrus preceding the perception of negative congruent stimuli. Increased source activity in superior temporal gyrus and superior frontal gyrus was found preceding stability and lower activation in parahippocampal gyrus was observed preceding reversals. Together these results suggest that the pre-stimulus activation of areas involved in visual priming, retrieval, and semantics leads to congruent perception. Pre-stimulus DMN suppression was required for perceptual reversals whereas stability was accompanied by pre-stimulus activation of areas related to the specific nature of the stimulus. Therefore, we propose that in addition to stimulus attributes, the pre-stimulus intrinsic brain activity could be an important determinant of the performance.

对象-上下文关系和效价是影响视觉感知的两个重要刺激属性。尽管先前的研究揭示了这两个因素如何分别影响视觉感知，但很少探讨价与视觉感知过程中对象上下文关联的一致或不一致之间的相互作用。此外，所感知的受刺激出现时大脑内在状态的影响，可以通过EEG微观状态对其进行评估。因此，本研究旨在探讨刺激前脑电图微状态如何影响双眼间歇性竞争中情感一致和不一致的刺激以及感知逆转和稳定性。结果显示特定的刺激前微状态与中性和负性一致刺激的感知以及感知逆转和稳定性之间的关联。这些微状态的电神经成像显示，在感知中性全等刺激之前，在前韧带和枕中回中有较高的活化作用，而在感知消极全等刺激之前，在舌前回具有较高的活化作用。稳定前发现颞上回和额叶上回的源活动增加，逆转前观察到海马旁回中的活化较低。这些结果共同表明，视觉启动，检索和语义中涉及的区域的刺激前激活会导致一致的感知。感知逆转需要刺激前DMN抑制，而稳定性伴随着刺激前激活与刺激特定性质有关的区域。因此，我们建议，除了刺激属性外，刺激前固有的大脑活动可能是表现的重要决定因素。