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Assessing the Reliability of Smooth Pursuit Across Various Neck Postures Using a Custom Ocular Motor Detection System
Sponsor: Kaohsiung Medical University
Summary
Phase 1：System Development and Validation A custom-made eye movement detection system was developed to quantify smooth pursuit eye movements under multiplanar neck postures. The initial study established the reliability and measurement consistency of ocular motor parameters, including Gain, SPNTD, Accuracy, and Latency, in healthy individuals. The findings demonstrated acceptable-to-excellent reliability and confirmed the feasibility of assessing ocular motor performance across multiple cervical planes. Phase 2：Clinical Application in Mechanical Neck Pain Based on the validated system developed in Phase 1, the present study investigates multidimensional oculomotor and cervical sensorimotor function in individuals with upper mechanical neck pain (MNP). By comparing MNP patients with asymptomatic controls, the study aims to identify sensitive oculomotor biomarkers associated with cervical sensorimotor dysfunction and to explore whether multi-axis ocular motor assessment provides additional clinical information beyond conventional cervical proprioception and range-of-motion measures.
Key Details
Gender
All
Age Range
20 Years - 60 Years
Study Type
INTERVENTIONAL
Enrollment
40
Start Date
2024-04-03
Completion Date
2025-12-31
Last Updated
2026-08-28
Healthy Volunteers
Yes
Interventions
Smooth pursuit neck torsion test
Used custom-made system to stimulate the procedure of smooth pursuit neck torsion test in the current study, the multiple axis motion platform can adjust the neck postures to three different neck motion planes, seven different neck postures.
Visual Analogue Scale
A 10-cm visual analogue scale used to assess pain intensity during standardized palpation of the upper cervical spine (C1-C3) and suboccipital region. Recorded for average, right, and left sides.
Craniovertebral Angle
A measure of forward head posture; the angle formed between a horizontal line and a line connecting the tragus of the ear to the spinous process of C7.
Joint Position Error
Assessed in sitting using a laser-pointer repositioning task with a target 90 cm in front of the participant at eye level. Participants actively moved their head in a randomized direction and then attempted to return to the neutral (target) position without visual feedback. Repositioning error was defined as the absolute angular deviation of the laser point from the target center, expressed in degrees. Six trials were performed per direction and averaged.
Locations (1)
Kaohsiung Medical University
Kaohsiung City, Sanmin District, Taiwan