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Facial-motion analysis with a video and computer system: a preliminary report
C J Linstrom1, C A Silverman, W M Susman
1Department of Otolaryngology-Head and Neck Surgery, The New York Eye and Ear Infirmary, New York 10003, USA.
The American Journal of Otology
|January 29, 2000
Summary
This study shows a new video and computer system can accurately measure facial motion. This technology is promising for evaluating facial paralysis and synkinesis.
Area of Science:
- Biomedical Engineering
- Clinical Measurement
- Facial Dynamics
Background:
- Objective evaluation of facial motion is crucial for assessing treatments for facial paralysis and paresis.
- Current methods lack sensitivity and reliability in capturing spatial and temporal facial dynamics.
- Development of precise measurement tools is needed for clinical applications.
Purpose of the Study:
- To assess the feasibility of a video and computer-assisted system for analyzing facial motion.
- To quantify spatial and temporal aspects of facial expressions in normal adults.
- To establish a reliable method for evaluating facial function.
Main Methods:
- Utilized a computer-interactive motion analysis system based on videography.
- Assessed facial motion at predetermined landmarks during various facial expressions.
- Collected data on displacement, velocity, and acceleration, averaging across trials and subjects.
Main Results:
- Identified peak displacements during eyebrow lifts (1.2 cm) and peak velocities during eye closure (4.5-8.5 cm/s).
- Greatest acceleration was observed during eyebrow lifts (193-465 cm/s/s).
- Demonstrated system's ability to detect synkinesis in a case with facial dysfunction.
Conclusions:
- The developed system is feasible for simultaneous, multiregional, spatio-temporal facial motion analysis.
- Quantification of motion in remote facial regions supports its use in evaluating synkinesis.
- This technology offers a sensitive and reliable tool for facial function assessment.