Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Express attentional shifts

M Mackeben1, K Nakayama

  • 1Smith Kettlewell Eye Research Institute, San Francisco, CA 94115.

Vision Research
|January 1, 1993
PubMed
Summary

Rapid attention shifts explain "express" saccades, which have very short latencies. The disappearance of a fixation cue, particularly in a gap paradigm, facilitates faster attention deployment, leading to quicker eye movements.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Proteolytic cleavages of proalbumin and complement Pro-C3 in vitro by a truncated soluble form of furin, a mammalian homologue of the yeast Kex2 protease.

Biochemical and biophysical research communications·1992
Same author

Contralateral development of acute subdural hematoma following surgery for chronic subdural hematoma--case report.

Neurologia medico-chirurgica·1992
Same author

[Invasive thymoma involving the liver: a case report of transdiaphragmatic extension].

Kyobu geka. The Japanese journal of thoracic surgery·1992
Same author

[Intracranial primary malignant lymphoma following Behçet's disease--case report].

No to shinkei = Brain and nerve·1992
Same author

Zinc triflate-promoted glycosidation: synthesis of lipid A disaccharide intermediates.

Chemical & pharmaceutical bulletin·1992
Same author

Mammalian subtilisin-related proteinases in cleavage activation of the paramyxovirus fusion glycoprotein: superiority of furin/PACE to PC2 or PC1/PC3.

Journal of virology·1992

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Ophthalmology

Background:

  • Express saccades exhibit extremely short latencies.
  • These saccades are more frequent when a gap exists between fixation mark disappearance and target appearance.
  • Hypotheses suggest attention movements precede eye movements, with fixation mark removal aiding attention disengagement.

Purpose of the Study:

  • To investigate the role of attention shifts in the generation of express saccades.
  • To provide direct evidence for the hypothesis that rapid attention shifts underlie short saccadic latencies.

Main Methods:

  • Attention was measured using extra-foveal vernier acuity.
  • Comparison of performance in gap versus no-gap paradigms with varying cue lead times.
  • Control experiments to isolate the effect of fixation mark disappearance.

Main Results:

  • Performance improved faster with increasing cue lead times in the gap paradigm.
  • The relationship between gap duration and discrimination performance mirrored that of gap duration and express saccade rate.
  • Fixation mark disappearance, not a general warning, accelerated attention shifts.

Conclusions:

  • The short latencies of express saccades are likely mediated by rapid attention shifts.
  • The findings support the model where attention disengages and deploys faster when the fixation cue is removed.
  • This mechanism explains the increased frequency of express saccades in gap paradigms.

Related Experiment Videos