Jove
Visualize
Contact Us

Related Experiment Videos

Extraocular muscle proprioceptors and proprioception.

G L Ruskell1

  • 1Department of Optometry and Visual Science, City University, London, UK.

Progress in Retinal and Eye Research
|April 7, 1999
PubMed
Summary

The role of proprioception in human eye movement perception is questioned due to structural anomalies in muscle spindles. Evidence suggests efference copy may be more critical for visual spatial perception than previously thought.

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

Muscle spindles in extraocular muscles of human infants.

Cells, tissues, organs·2001
Same author

Myotendinous nerve endings in human infant and adult extraocular muscles.

The Anatomical record·2000
Same author

Sensory innervation of conjunctival lymph follicles in cynomolgus monkeys.

Investigative ophthalmology & visual science·1997
Same author

Peripapillary venous drainage from the choroid: a variable feature in human eyes.

The British journal of ophthalmology·1997
Same author

Innervation of the palpebral conjunctiva and the superior tarsal muscle in the cynomolgous monkey: a retrograde fluorescent tracing study.

Journal of anatomy·1996
Same author

Organization and cytology of lymphoid tissue in the cynomolgus monkey conjunctiva.

The Anatomical record·1995
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

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Sensory Physiology

Background:

  • The precise roles of proprioception and efference copy in visual spatial perception remain debated.
  • Recent physiological studies suggest proprioception collaborates with or serves temporal adaptations, while efference copy handles current visual perception.
  • Visuomotor cell characteristics in monkeys support the input of efference copy.

Purpose of the Study:

  • To investigate the structural basis for proprioception in human extraocular muscles.
  • To reconcile conflicting anatomical data regarding muscle afferents and their role in visual spatial perception.
  • To evaluate the contribution of proprioception versus efference copy in human visual spatial perception.

Main Methods:

  • Review and synthesis of anatomical data from human and animal studies on extraocular muscle innervation.
  • Detailed examination of human extraocular muscle spindles and neurotendonous endings.
  • Comparison of findings in humans with those in cats and monkeys.

Main Results:

  • Human extraocular muscles lack Golgi tendon organs; possess palisade and irregular nerve endings.
  • Neurotendonous endings have a limited, patchy distribution in humans and develop post-infancy.
  • Human muscle spindles exhibit structural anomalies, including atrophy of intrafusal fibers, questioning their proprioceptive capacity.

Conclusions:

  • Structural anomalies in human extraocular muscle spindles challenge their role in providing reliable proprioceptive information.
  • Findings question recent physiological studies supporting proprioception's role in visual spatial perception.
  • The data favor efference copy as a more significant mechanism for visual spatial perception in humans.

Related Experiment Videos