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Computerized rotational head impulse test : test-retest reliability
Dissertation (MA (Audiology))--University of Pretoria, 2021.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2021
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| _version_ | 1867613481705930753 |
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| access_status_str | Open Access |
| author2 | Heinze, Barbara M. |
| author_browse | Heinze, Barbara M. |
| author_facet | Heinze, Barbara M. |
| collection | Thesis |
| dc_rights_str_mv | © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MA (Audiology))--University of Pretoria, 2021. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/78036 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:36:50.456Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/78036 Computerized rotational head impulse test : test-retest reliability Heinze, Barbara M. roxy.loock@gmail.com Kiderman, Alex González, Jorge Loock, Roxanne Audiology UCTD Dissertation (MA (Audiology))--University of Pretoria, 2021. Introduction: The computerized rotational head impulse test (crHIT) was recently developed to overcome limitations of the video head impulse test (vHIT) and assess the functioning of the lateral semicircular canals (SCC) in a more objective manner. Instead of an examiner applying rapid, brief, and unpredictable head rotations, as during the vHIT, the crHIT utilizes computer-controlled whole-body rotations. Since the crHIT is newly developed, its test-retest reliability for clinical use needed to be determined. Methods: Thirty-one healthy adult participants, between the ages of 18 and 40, with normal lateral SCC functioning and no symptoms or history of vestibular dysfunction were assessed with the crHIT using both earth-bound, stationary and head-fixed targets. These participants were assessed on three separate occasions: the second evaluation took place one to six hours after the initial evaluation and the third evaluation 24 hours to two weeks after the second evaluation. Results: For the stationary target, the mean angular vestibulo-ocular reflex (aVOR) gain ranged from 0.98 to 1.02 at a 95% confidence interval. A one-way repeated measures ANOVA test was performed to provide information about the reliability and repeatability of the aVOR gain across the different time intervals. It was demonstrated that the mean aVOR gain values were statistically equal across all three time intervals, and between both protocols that utilized stationary targets. Additionally, Bland-Altman plots demonstrated high Limits of Agreement (LoA). For the head-fixed target, a one-way repeated measures ANOVA demonstrated significant differences in the aVOR gain values both across and within the three testing sessions. These significant differences were demonstrated as a decrease in aVOR gains both across and within the three testing sessions. Conclusion: The crHIT is a reliable measure of determining lateral SCC function. Further investigation is required to determine the physiological mechanisms underlying the decreased aVOR gain values across multiple testing sessions. However, it is suspected that vestibular habituation as well as aVOR and saccadic adaptation mechanisms have potentially contributed to the decrease in aVOR gain values across the multiple testing sessions. Speech-Language Pathology and Audiology MA (Audiology) Unrestricted 2021-01-14T18:19:21Z 2021-01-14T18:19:21Z 2021-09 2021 Dissertation * S2021 http://hdl.handle.net/2263/78036 en © 2019 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Audiology UCTD Computerized rotational head impulse test : test-retest reliability |
| title | Computerized rotational head impulse test : test-retest reliability |
| title_full | Computerized rotational head impulse test : test-retest reliability |
| title_fullStr | Computerized rotational head impulse test : test-retest reliability |
| title_full_unstemmed | Computerized rotational head impulse test : test-retest reliability |
| title_short | Computerized rotational head impulse test : test-retest reliability |
| title_sort | computerized rotational head impulse test test retest reliability |
| topic | Audiology UCTD |
| url | http://hdl.handle.net/2263/78036 |