Michal Fux¹, Suayb Arslan², Abdul Rahman³, Pawan Sinha¹; ¹MIT, ²Boğaziçi University, ³Indian Institute of technology Madras

This study explores how the brain’s communication patterns change when we look at images that vary in visual detail—specifically blurred, clear, and high-pass filtered pictures. We focused on activity in the brain’s alpha band, a rhythmic signal linked to attention, coordination between brain regions, and the integration of visual information. By measuring how strongly different brain areas synchronized with one another, we examined how the brain adapts its processing strategies depending on how much coarse or fine detail an image contains. The results show a consistent pattern. When observers viewed blurred images, the brain displayed strong long-range communication, especially between frontal, parietal, and temporal regions. This suggests that when visual detail is limited, the brain recruits a broad network to fill in missing information and form an overall understanding of the scene. Clear images produced a more moderate level of connectivity, reflecting a balance between global interpretation and the straightforward processing of available detail. In contrast, sharp, high-detail images led to much weaker widespread communication. Instead, only a few localized connections—most notably between visual and prefrontal regions—increased, indicating a shift toward more detail-oriented, local processing. Overall, the study suggests that the brain flexibly changes its communication patterns depending on the type of visual information available. Blurred images encourage holistic, integrative processing; clear images produce a balanced response; and sharp images promote focused, detail-driven analysis. These findings offer insights into how the brain allocates attention and coordinates different regions to make sense of the visual world.