Predicting the spatial and temporal distortions caused by saccades.
Multiple Paper Presentation

Maria Concetta Morrone
Universita’ Vita-Salute S Raffaele, Milan Italy

     Abstract ID Number: 217
     Last modified: April 27, 2006
     Presentation date: 06/20/2006 2:00 PM in Hamilton Building, McNeil Theatre
     (View Schedule)

Abstract
Saccades cause major consequences to human vision. As well as suppressing sensitivity, they cause transient but dramatic compressive distortions in both space and in time. However, neither the apparent location nor the apparent duration of acoustic targets is affected by saccades. When visuo-acoustic stimuli are displayed briefly during saccades, their apparent position is determined largely by sound, a form of “inversed ventriloquist effect”. This can be well explained by optimal Bayesian fusion between the two signals, assuming that the intention to move the eyes causes the visual signal to become more noisy peri-saccadically. I will then go on to present a model based on neuronal mechanisms that simultaneously encode space and time. The model simulates both the spatial and temporal compression of visual stimuli during saccades as a consequence of the rapid updating receptive field organization.

To be Presented at the Following Symposium:
Models of multisensory integration: synthetic vs. naturalistic situations?
Other papers in this Symposium:

• Alexandre Pouget
  Brain and Cognitive Sciences, University of Rochester
  Neural basis of Bayes-optimal multisensory integration: theory and experiments
• Andrew King
  Department of Physiology, Anatomy and Genetics, University of Oxford
  Investigating multisensory convergence in the auditory cortex