A Neural Mechanism for Microsaccade Generation in the Primate Superior Colliculus

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Science  13 Feb 2009:
Vol. 323, Issue 5916, pp. 940-943
DOI: 10.1126/science.1166112

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  • Reply to M. Rolfs' E-Letter

    We agree that the functional role of microsaccades and other fixational eye movements remains an interesting open question. We take issue, however, with M. Rolfs' use of the term "fixation instability." In our Report, we did not uncover a "neural mechanism for fixation instability," but rather a mechanism for generating a type of eye movement that is frequently observed during gaze fixation. There are several pathological condi...

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    Competing Interests: None declared.
  • A Neural Mechanism for Fixation Instability

    Z. M. Hafed et al. show in their Report ("A neural mechanism for microsaccade generation in the primate superior colliculus," 13 February 2009, p. 940) how the brain generates the smallest rapid eye movements. Rostral neurons of the superior colliculus (SC) encode goal locations very close to the fovea and fire vigorously before microsaccades into their response field. The authors have made an important step in reveali...

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    Competing Interests: None declared.

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