Oculo-motor, vestibulo-ocular function and motor performance of school-aged children : a pilot study

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Oculo-motor, vestibulo-ocular function and motor performance of school-aged children : a pilot study

 

Author: Lee, Wai-nga Clara
Title: Oculo-motor, vestibulo-ocular function and motor performance of school-aged children : a pilot study
Degree: M.Sc.
Year: 2009
Subject: Hong Kong Polytechnic University -- Dissertations
Motor ability in children -- Testing
Vision -- Testing
Vestibular function tests
Department: Dept. of Rehabilitation Sciences
Pages: xiv, 120 leaves : ill. ; 31 cm.
InnoPac Record: http://library.polyu.edu.hk/record=b2356217
URI: http://theses.lib.polyu.edu.hk/handle/200/5820
Abstract: Background: Little information exits that examine oculo-motor, vestibulo-ocular function and how they may influence motor development in school-aged children. This pilot study aims to document the status of development and delineate possible correlation among the three systems, with the view to provide fundamental knowledge and norm reference for health professionals, such as Physiotherapist, in developing evidence-based assessment and management for children with motor dysfunction. Methods: Nineteen typically developling (ID) children (mean age 7.74, SD 1.15 years) were recruited by convenient sampling. Motor performance of participants were evaluated by the Bruininks-Oseretsky Test of Motor Proficiency, 2nd edition (BOT-2). Oculo-motor and vestibulo-ocular function were examined by Videonystagmography (VNG) and Computerized Dynamic Visual Acuity Test (CDVAT). Results: All children have normal motor development (BOT-2 score) and obtained nonnal caloric test response implying normal vestibular function. Children aged < 7 years old obtained significant lower scores (p values < 0.05) in motor performances, vestibulo-ocular function (dynamic visual acuity score) and oculo-motor function (saccades, smooth pursuit and OPK velocity/gain) than children > 8 years old. Better oculo-motor function (saccades's latency, r= 0.54, p=0.02; smooth pursuit's velocity, r=0.54, p=0.02; smooth pursuit's gain, r=0.47, p=0.05; OPK's gain, r=0.50, p=0.03; and VOR function (CDVAT scores in dynamic horizontal test r=0.45 , p=0.05 and dynamic vertical test r=0.56, p=0.01) was found to correlate with better upper coordination of BOT-2 test. Conclusions: In typically developing children, oculo-motor system appeared to perform better as result of age, and developed as adult-like as age increase. The function of VOR appeared to perfonn better as result of age, and developed as adult-like beyond the age of 8. Better performance in upper limbs coordination was correlated with better oculo-motor functions and VOR function. This study provide preliminary normative data of oculo-motor and VOR function of school-aged children. The battery of test used in this study would help identifying if oculo-motor and vestibulo-ocular function of children presenting with delay in motor development or motor movement dysfunction (such as children with DCD) is one of the cause of motor difficulties, and hence help therapists to develop evidence-based and specific intervention to address their issues.

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