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Express saccades: is there a separate population in humans?
M G Wenban-Smith1, J M Findlay
1Department of Psychology, University of Durham, UK.
Experimental Brain Research
|January 1, 1991
Summary
Researchers confirmed short-latency visually guided saccades in humans. However, this study questions if these rapid eye movements constitute a distinct "express saccade" population, challenging previous findings.
Area of Science:
- Neuroscience
- Ophthalmology
- Cognitive Psychology
Background:
- Saccade latencies are reduced by fixation point offset.
- Fischer and Boch (1983) identified
- express saccades
- ,
- with extremely short reaction times in monkeys.
- A similar population was later reported in humans (Fischer and Ramsperger 1984; Fischer 1987).
Purpose of the Study:
- To investigate the existence of short latency visually guided saccades in humans.
- To determine if these saccades represent a distinct population termed
- express saccades
- .
Main Methods:
- Utilized experimental conditions similar to those established by Fischer and Boch.
- Recorded and analyzed visually guided saccade latencies in human participants.
Main Results:
- Confirmed the presence of short latency visually guided saccades in humans.
- Data suggests these saccades may not form a separate
- express saccade
- population.
Conclusions:
- The existence of short latency visually guided saccades in humans is supported.
- Further research is needed to clarify whether these represent a distinct
- express saccade
- category.