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[Bivariate normal values of optokinetic nystagmus test]
Nihon Jibiinkoka Gakkai Kaiho
|May 1, 1993
Summary
This study establishes new criteria for diagnosing equilibrium disorders using optokinetic pattern (OKP) tests. Bivariate normal values and ranges, calculated using Mahalanobis generalized distance, help distinguish normal from abnormal OKP results.
Area of Science:
- Ophthalmology and Neuroscience
- Vestibular System Function
Context:
- Optokinetic pattern (OKP) tests aid in diagnosing equilibrium disorders.
- Current methods lack clear criteria for interpreting two-dimensional OKP numerical data from directional optic stimulation.
Purpose:
- To establish bivariate normal values and ranges for OKP numerical data.
- To develop a criterion for distinguishing normal from abnormal OKP results.
Summary:
- Established bivariate normal values and ranges using 1482 normal OKP datasets.
- Utilized total nystagmus count, slow-phase amplitudes/velocities, and fast-phase velocities as variables.
- Employed Mahalanobis generalized distance (MGD) and elliptical ranges based on bivariate normal distributions for discrimination.
Impact:
- Provides a method for simple discrimination between normal and abnormal bivariable OKPs.
- Enhances clinical interpretation of OKP test results for equilibrium disorder diagnosis.