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Related Experiment Videos

Vertical saccades in senescence

A G Huaman1, J A Sharpe

  • 1Neuro-ophthalmology Unit, Toronto Hospital Neurological Center, Ontario, Canada.

Investigative Ophthalmology & Visual Science
|July 1, 1993
PubMed
Summary
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In elderly individuals, vertical saccades show reduced range and accuracy, with increased latency. This study establishes norms for detecting age-related neurological and orbital diseases.

Area of Science:

  • Ophthalmology
  • Neuroscience
  • Gerontology

Background:

  • Ocular motor function changes with age.
  • Establishing age-specific norms is crucial for diagnosing neurological and orbital diseases.

Purpose of the Study:

  • To quantify vertical saccade metrics in elderly subjects.
  • To provide comparative data for identifying age-related changes in neurologic disease.

Main Methods:

  • Magnetic search coil technique used to measure saccades.
  • Examined young, middle-aged, and elderly subjects.
  • Measured vertical target steps and maximal saccadic excursion.

Main Results:

  • Elderly subjects exhibited reduced maximal upward and downward saccadic excursion compared to young subjects.

Related Experiment Videos

  • Vertical saccade latency was prolonged, and accuracy was reduced in the elderly.
  • Peak saccadic velocities were not significantly slower in the elderly.

    • Conclusions:

    • Senescence leads to decreased range and accuracy of vertical saccades, with increased latency.
    • Quantitative data provides norms for detecting brain or orbital disease in different age groups.