Eva Siegenthaler, Francisco M. Costela, Michael B. McCamy, Leandro L. Di Stasi, Jorge Otero-Millan, Andreas Sonderegger, Rudolf Groner, Stephen Macknik and Susana Martinez-Conde Task difficulty in mental arithmetic affects microsaccadic rates and magnitudes European Journal of Neuroscience 39
We investigated the effects of task difficulty on human microsaccades during the performance of a mental arithmetic task. Microsaccade rates decreased and microsaccade magnitudes increased with increased task difficulty. These results are consistent with task difficulty-induced variations in attentional load, which may modulate microsaccadic rates and magnitudes via changes in the intensity and shape of the rostral superior colliculus activity map.
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