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Eye blinks, typically occurring 15–20 times per minute, rarely capture attention during face‐to‐face interaction. To determine the extent to which eye blinks affect the viewer's brain activity, we recorded magnetoencephalographic brain responses to natural blinks, and to the same blinks slowed down to 38% of the original speed. The stimuli were presented on video once every 2.3–6.2 s. As a control, we presented two horizontal black bars moving with the same time courses and the same extent as the eyelids in the blink video. Both types of blinks and bars elicited clear responses peaking at about 200 ms in the occipital areas, with no systematic differences between hemispheres. For the bars, these main responses were (as expected) weaker (by 24%) and later (by 33 ms) to slow‐motion than normal‐speed stimuli. For blinks, however, the responses to both normal‐speed and slow‐motion stimuli were of the same amplitude and latency. Our results demonstrate that the brain not only responds to other persons' eye blinks, but that the responses are as fast and of equal size even when the blinks are considerably slowed down. We interpret this finding to reflect the increased social salience of the slowed‐down blinks that counteracted the general tendency of the brain to react more weakly and more slowly to slowly‐ vs. quickly‐changing stimuli. This finding may relate to the social importance of facial gestures, including eye blinks.

Neuromagnetic brain responses to other person's eye blinks seen on video