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Software for subjective visual vertical assessment: an observational cross-sectional study.

Theo Zeferino Pavan¹, Martha Funabashi, José Ailton Oliveira Carneiro

¹Department of Physics, School of Philosophy, Sciences, and Literature of Ribeirão Preto, University of São Paulo, Ribeirão Preto - SP, Brazil.

Brazilian Journal of Otorhinolaryngology

|October 31, 2012

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This study developed a virtual system for the subjective visual vertical exam, offering a practical and accurate tool for clinical use in assessing spatial orientation. Healthy subjects showed reliable measurements in static and dynamic conditions.

Area of Science:

Neuroscience
Human Motor Control
Clinical Assessment Tools

Background:

Spatial orientation is crucial for posture, gait, and motor activities.
The subjective visual vertical (SVV) exam assesses an individual's perception of vertical orientation.
Accurate SVV assessment is vital for understanding and diagnosing neurological and vestibular disorders.

Purpose of the Study:

To develop a virtual system for evaluating the subjective visual vertical exam.
To create a user-friendly tool for clinical practice.
To determine the SVV values in healthy subjects using the novel software.

Main Methods:

An observational cross-sectional study involving thirty healthy volunteers.
Participants performed the SVV exam using a computer mouse to adjust a virtual line's vertical position.

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Measurements were taken under static (white background) and dynamic (rotating circles) conditions.

Main Results:

Mean SVV values were -0.372º ± 1.21 in static conditions.
Dynamic conditions yielded mean values of 1.53º ± 1.80 (clockwise) and -1.11º ± 2.46 (counterclockwise).
The software demonstrated practicality and accuracy in capturing SVV measurements.

Conclusions:

The developed virtual system is a practical and accurate tool for clinical SVV assessment.
The software facilitates routine clinical use for evaluating spatial orientation.
This technology aids in understanding normal SVV values in healthy individuals.