Visually
goal-oriented saccades were recorded under the double-step paradigm. Data were
analyzed to produce parameter estimates using the system identification
technique for a 3rd-order linear horizontal saccadic eye movement model.
Statistical analysis of a large human saccade data set provided reliable
conclusions of the response properties.
Saccade amplitude, latency and
inter-saccade interval were discussed with time delay, indicating the parallel
programming mechanism, which two saccades to different targets could be programmed
simultaneously. The results of neural input estimations suggested that the
double-step visual targets may affect the synchronous firing of the saccade
responsible neurons in the superior colliculus.
Saccades
are the fastest eye movements that enable us to rapidly redirect our line of
sight from one target to another one. They are conjugate and ballistic, with a
typical duration of 30-100 ms and a latency of 100-300 ms when triggered by
visual stimuli. The latency is thought to be the time interval during which the
CNS determines whether to make a saccade, and, if so, calculates the distance
the eyeball is to be moved, transforming retinal errors into transient muscle
activity. Read More.....
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