[Methods for evaluating the vestibulo-ocular reflex].

Area of Science:

• Neuroscience
• Ophthalmology
• Vestibular System

Background:

• The oculovestibular reflex (VOR) is vital for maintaining visual stability during head movements.
• Characterizing VOR is essential for diagnosing vestibular and oculomotor disorders.
• Existing methods may lack precision in quantifying VOR parameters.

Purpose of the Study:

• To detail methods for measuring the reactivity coefficient and phase shift of the VOR.
• To establish reliable metrics for evaluating oculovestibular interaction.
• To provide a standardized approach for assessing vestibular system reactivity.

Main Methods:

• Describing the measurement of the reactivity coefficient, a relative value indicating oculovestibular interaction.
• Defining and detailing the measurement of phase shift, quantifying the delay or lead in oculomotor response relative to the stimulus.
• Outlining specific procedures for capturing these VOR parameters.

Main Results:

• The reactivity coefficient provides a less variable measure of vestibular system normality compared to nystagmus.
• Phase shift quantifies the temporal relationship between vestibular stimulus and oculomotor output.
• The described methods allow for precise quantification of VOR characteristics.

Conclusions:

• The reactivity coefficient and phase shift are key quantitative parameters of the oculovestibular reflex.
• These metrics offer a robust and reliable method for assessing vestibular function.
• Standardized measurement of these parameters can aid in clinical diagnosis and research.