It may not feel like it, but our eyes are constantly making rapid, tiny movements called saccades, taking in new information as we focus our gaze on various things in the world. As we do so, our brains receive the input – and depending on what the
In an experiment, Staudigl and fellow researchers worked with 13 epilepsy patients, who had electrodes implanted in their brains to monitor their condition. This kind of intervention can be helpful for brain scientists, so they often turn to such patients with electrodes already implanted, in case they'd be willing to volunteer their time.
While they were doing this, a camera-based eye-tracking system monitored what objects their eyes were looking at, and the electrodes simultaneously monitored neural activity in the amygdala and the hippocampus – distinct parts of the brain that are both involved with different aspects of processing memories, amongst other functions, with the amygdala also important for regulating our emotions.
The foundations for those decisions have to start somewhere, and the researchers say the process can be seen beginning in the rapid adjustments of saccadic eye movements.more so than for other forms of stimuli, although the reasons for this have remained uncertain.
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