Emotional scene content drives the saccade generation system reflexively

Area of Science:

• Cognitive Neuroscience
• Visual Perception
• Ophthalmology

Background:

• The influence of emotional stimuli on cognitive processes is well-documented.
• However, the impact of emotional content on the early stages of eye movement control, specifically saccade programming, remains less understood.

Purpose of the Study:

• To investigate whether parafoveal perception of emotional content influences saccade programming.
• To determine if emotional scenes are processed automatically, affecting saccade target selection and execution before overt attention.

Main Methods:

• Four experiments were conducted using visual scenes (emotional and neutral) presented to parafoveal vision.
• Tasks included voluntary saccades guided by cues and reflexive saccades triggered by luminosity changes.
• Saccade reaction times, endpoints, and trajectories were analyzed.
• Computational modeling assessed visual saliency and the effect of image inversion.

Main Results:

• Saccadic reaction times were significantly faster when saccades were directed toward emotional scenes compared to neutral scenes.
• Reflexive saccade trajectories deviated away from the visual field containing emotional scenes.
• Visual saliency did not account for these effects, and image inversion abolished the rapid orienting response.

Conclusions:

• Early saccade target selection and execution processes are automatically influenced by emotional picture content.
• Meaningful scene content, particularly emotional content, is processed rapidly, preceding overt attention to the stimulus.