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Optom Vis Sci. 2008 Mar;85(3):187-95. doi: 10.1097/OPX.0b013e3181647196.

Divergence influences triggering of both vertical and horizontal saccades.

Author information

1
IRIS Team, CNRS Paris, Paris, France. marine.vernet@espci.org

Abstract

PURPOSE:

In real life, divergence is frequently combined with vertical saccades. The purpose of this study was to examine the initiation of vertical and horizontal saccades, pure or combined with divergence.

METHODS:

We used a gap paradigm to elicit vertical or horizontal saccades (10 degrees), pure or combined with a predictable divergence (10 degrees). Eye movements from 12 subjects were recorded with EyeLink II.

RESULTS:

The major results were (i) when combined with divergence, the latency of horizontal saccades increased but not the latency of vertical saccades; (ii) for both vertical and horizontal saccades, a tight correlation between the latency of saccade and divergence was found; (iii) when the divergence was anticipated, the saccade was delayed.

CONCLUSION:

We conclude that the initiation of both components of combined movements is interdependent.

PMID:
18317334
DOI:
10.1097/OPX.0b013e3181647196
[Indexed for MEDLINE]

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