ASSESSMENT OF SUBJECTIVE VISUAL VERTICAL WITH THE BUCKET TEST IN CHILDREN
1AYBÜ, Odyoloji, Ankara, Türkiye Introduction: Subjective Visual Vertical (SVV) perception occurs by interpreting visual, somatosensory and vestibular inputs in the central nervous system. Impairments in SVV perception may be observed in some vestibular system lesions, especially otolith dysfunctions, and these can be detected by static SVV test. The bucket test, a version of the static SVV test, is a test that can be easily performed with simple, low-cost equipment. The aim of this study is to create normative data by determining deviation from the vertical in children with the bucket test.Method and Materials: In the study, bucket test was applied to 41 girls (54.7%) and 34 boys (45.3%) (75 in total) healthy children aged 7-12 years to evaluate binocular SVV. The child's face was positioned vertically in the bucket with a mark on its bottom, and the bucket was rotated until the child indicated that he/she saw the shape vertically. The test was completed by performing a total of 10 repetitions, 5 in clockwise and 5 in counterclockwise rotation. The amount of deviation from the vertical was determined in degrees by taking the arithmetic average of the deviation angles from the vertical obtained from 5 trials in the same rotation direction.
Results: The median ± standard deviation of visual vertical slope was determined as 0 ± 3.4º. In the clockwise evaluation, the median of the degree of deviation from the vertical was 0.8º, with a 95% CI [0.8 º - 1.4 º], and in the counterclockwise evaluation, the median of the degree of deviation from the vertical was 0.8º, with a 95% CI [0.6 º - 1 º].
Conclusion: In this study, normative data for children was obtained with the bucket test which is an easy-to-use and low-cost tool, can be added to the vestibular test battery in the pediatric population.
Keywords : Bucket Test, Subjective Visual Vertical, Otolith Organs, Vestibular Dysfunction