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

Eye acceleration during large horizontal saccades in man

P Brown1, B L Day

  • 1MRC Human Movement and Balance Unit, Institute of Neurology, London, UK.

Experimental Brain Research
|January 1, 1997
PubMed
Summary
This summary is machine-generated.

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

Individual differences in expert motor coordination associated with white matter microstructure in the cerebellum.

Cerebral cortex (New York, N.Y. : 1991)·2012
Same author

Magnetic field effects on the vestibular system: calculation of the pressure on the cupula due to ionic current-induced Lorentz force.

Physics in medicine and biology·2012
Same author

Short latency intracortical inhibition: one of the most popular tools in human motor neurophysiology.

The Journal of physiology·2008
Same author

Putaminal activity is related to perceptual certainty.

NeuroImage·2008
Same author

De-stabilizing and training effects of foot orthoses in multiple sclerosis.

Multiple sclerosis (Houndmills, Basingstoke, England)·2006
Same author

The neural basis of temporal auditory discrimination.

NeuroImage·2005

Saccadic eye movements show distinct acceleration patterns, including multi-frequency pulses or waves. These patterns reflect rhythmic eye muscle activity, not instrument artifacts.

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Biomechanics

Background:

  • Saccadic eye movements are rapid, ballistic movements crucial for vision.
  • Understanding the biomechanics of saccades provides insights into neural control.
  • Previous methods for measuring saccade dynamics were limited.

Purpose of the Study:

  • To characterize the acceleration patterns during horizontal saccadic eye movements.
  • To investigate the underlying mechanisms generating these acceleration profiles.
  • To differentiate physiological signals from potential instrument artifacts.

Main Methods:

  • Utilized a lightweight accelerometer attached to a scleral contact lens to record acceleration during horizontal saccades (15-20 degrees).
  • Simultaneously recorded acceleration using an accelerometer over the contralateral closed eyelid to rule out system artifacts.

Related Experiment Videos

  • Performed surface electromyogram (sEMG) recordings to correlate muscle activity with acceleration patterns.

    • Main Results:

    • Horizontal saccades exhibited two main acceleration patterns: multi-pulse (approx. 40 Hz) or single acceleration-deceleration wave with subsequent polyphasic activity (approx. 80 Hz).
    • Similar acceleration patterns were observed between the contact lens and the eyelid-mounted accelerometer, suggesting physiological origins.
    • sEMG analysis revealed a correlation between multicomponent acceleration profiles and rhythmic, synchronous modulation of eye muscle discharge.

    Conclusions:

    • The observed acceleration patterns during saccades are primarily physiological, reflecting modulated eye muscle activity.
    • The findings suggest a rhythmic and synchronous control mechanism for eye muscles during saccadic tasks.
    • This study provides a novel method for analyzing saccade biomechanics and neural control.