What Causes People to Move Their Eyes Back & Forth Looking Up While Seeking an Answer in Memory Bank?

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Are you one whose gaze shifts upward, eyes moving back and forth, as if scanning the brain when trying to remember some bit of information? Could there be some physiological reason for this, that the eyes in that position stimulates recall, or symbolic looking to the heavens for help, or merely the feeling that moving the eyes like that is somehow scanning the brain for the information?