Coherent illusory contours reduce microsaccade frequency

Alexis D J Makin, Rochelle Ackerley, Kelly Wild, Ellen Poliakoff, Emma Gowen, Wael El-Deredy

Research output: Contribution to journalArticlepeer-review


Synchronized high-frequency gamma band oscillations (30-100. Hz) are thought to mediate the binding of single visual features into whole-object representations. For example, induced gamma band oscillations (iGBRs) have been recorded ∼280. ms after the onset of a coherent Kanizsa triangle, but not after an incoherent equivalent shape. However, several recent studies have provided evidence that the EEG-recorded iGBR may be a by-product of small saccadic eye movements (microsaccades). Considering these two previous findings, one would hypothesis that there should be more microsaccades following the onset of a coherent Kanizsa triangle. However, we found that microsaccade rebound rate was significantly higher after an incoherent triangle was presented. This result suggests that microsaccades are not a reliable indicator of perceptual binding, and, more importantly, implies that iGBR cannot be universally produced by ocular artefacts. © 2011 Elsevier Ltd.
Original languageEnglish
Pages (from-to)2798-2801
Number of pages3
Issue number9
Publication statusPublished - Jul 2011


  • EEG
  • Gamma band oscillations
  • Kanizsa triangles
  • Saccades
  • Spike Potential


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