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

Stimulus sequence effects on human express saccades described by a Markov model

M Jüttner1, W Wolf

  • 1Institut für Medizinische Psychologie, Universität München, Germany.

Biological Cybernetics
|January 1, 1994
PubMed
Summary

Saccade preparation time is influenced by trial history, particularly catch trials, affecting express saccade frequency. This sequence effect varies with stimulus uncertainty type.

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

Transient recovery from trypsin-caused reduction in fertilizability of sea urchin eggs.

Wilhelm Roux's archives of developmental biology·2017
Same author

Genetic variation among 82 pharmacogenes: The PGRNseq data from the eMERGE network.

Clinical pharmacology and therapeutics·2016
Same author

H in α-Zr and in zirconium hydrides: solubility, effect on dimensional changes, and the role of defects.

Journal of physics. Condensed matter : an Institute of Physics journal·2014
Same author

Endocrinology in medical practice.

The interne·2010
Same author

The role of the endocrine glands in emotional disturbances, crime and rehabilitation.

Journal of clinical and experimental psychopathology·2010
Same author

Endocrine functions.

The Journal of dental medicine·2010

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Oculomotor Research

Background:

  • Express saccades are rapid eye movements primarily observed in gap paradigm experiments.
  • Their occurrence is significantly modulated by the inclusion of catch trials (trials lacking a visual target).

Purpose of the Study:

  • To investigate how stimulus uncertainty (direction, amplitude) and trial sequence influence saccade preparation time.
  • To generalize the understanding of catch trial effects beyond the standard gap paradigm.

Main Methods:

  • Experimental manipulation of stimulus uncertainty and trial sequencing.
  • Analysis of express saccade frequency and saccade preparation times.
  • Development and application of a two-state Markov process model.

Related Experiment Videos

Main Results:

  • Saccade preparation time is dependent on both the type of stimulus uncertainty and the preceding trial sequence.
  • The stimulus sequence effect is most pronounced with catch trials, followed by direction uncertainty, and absent for amplitude uncertainty.
  • A proposed two-state Markov model successfully links trial history to the preparation of express versus regular saccades.

Conclusions:

  • Trial history, especially catch trials, plays a critical role in modulating saccade preparation and express saccade generation.
  • The findings necessitate adjustments to current models of saccade programming to incorporate sequential effects.
  • The study highlights the dynamic nature of the oculomotor system's preparation based on recent experimental history.