Seminar Details
2010-05-25 (14.00) : Modeling of the interaction between smooth pursuit and saccadic eye movements
At Euler building
Organized by Mathematical Engineering
Speaker :
Coppe, Sébastien
Abstract :
The objective of this work was to implement a model which could
illustrate the orienting eye movements of human subjects.
This model generates the two main types of orienting eye movements,
the fast movements (saccades) and the slow movements (pursuit). In the
literature, there is no model illustrating the detailed interactions
between those two types of eye movements, for example to determine the
switch between fast and slow systems.
It is important to emphasize the fact that there are important delays
(more than 100 ms) in visual sensory signals. One way to deal with
these delays is to have a good interaction between the two systems.
Another way is to use prediction to anticipate target movement. These
predictive mechanisms are also used in absence of visual stimuli, for
example during temporary blanking of the target, and need as well an
efficient interaction between fast and slow systems.
The model proposed here takes into account recent experimental results
in order to explain the behavior of a normal subject performing a
visual tracking task.
This model could facilitate the interpretation of new experimental
results, based on its theoretical predictions. It could also guide
future experimental research.