Evidence map›Paper›PMID 42507200›Full record

ArticleEuropean archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery2026

Horizontal vHIT gain is unaffected by moderate cognitive load: evidence from a single-distance dual-task paradigm.

Muhammed Ayas, Jameel Muzaffar, Manohar L Bance

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Article in European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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4 · The record

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5 · Who and what money

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3 authors.

Muhammed AyasAudiology and Speech Language Pathology, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates. mohdayas@gmail.com.ORCID http://orcid.org/0000-0001-8373-7232
Jameel MuzaffarDepartment of ENT, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.ORCID http://orcid.org/0000-0003-3065-0269
Manohar L BanceDepartment of Clinical Neurosciences, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0001-8050-3617

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeTo determine whether moderate cognitive load alters horizontal vestibulo-ocular reflex (VOR) gain during the video head impulse test (vHIT) and to evaluate the reliability of vHIT under dual-task conditions.

methodsThirty-three healthy young adults (mean age 21.3 ± 2.1 years) completed two vHIT conditions: (1) a baseline single-task condition and (2) a dual-task cognitive load condition involving serial subtraction aloud while fixating a constant target at a single distance. Horizontal VOR gains were measured bilaterally. Mental effort and dizziness were rated on 0 to 10 numerical rating scales.

resultsBaseline VOR gains were 0.925 ± 0.063 (left) and 0.924 ± 0.074 (right). Under cognitive load, gains were 0.938 ± 0.084 and 0.938 ± 0.074, small increases of 1.4 to 1.5% that were non-significant (p > 0.40) and met equivalence criteria within ± 0.05 gain units. Reliability across conditions was excellent (ICC [3,1] = 0.90 left; 0.89 right). Cognitive engagement increased significantly (2.1 ± 1.1 to 7.3 ± 1.4; p < 0.001), while dizziness remained minimal. No meaningful correlation was observed between gain change and perceived effort or dizziness (Spearman's ρ < 0.05, p > 0.05).

conclusionHorizontal vHIT gain remained stable, statistically equivalent, and highly reliable under cognitive load, despite marked increases in perceived effort. These findings highlight the attentional resilience of the horizontal VOR, consistent with its brainstem-mediated circuitry. Consequently, horizontal vHIT appears robust for use in routine clinical settings where divided attention may be present.

Indexed as

CognitionHead Impulse TestReflex, Vestibulo-OcularAdultDual-Task TestsFemaleHumansMaleReproducibility of ResultsYoung AdultCognitive loadDual-task paradigmSemicircular canalsVestibular functionVestibulo-ocular reflexVideo head impulse test

Identifiers

PMID42507200

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.