Vestibular Function in Mild Cognitive Impairment and Alzheimer's Disease: A Narrative Review Hafif Bilişsel Bozuklukta ve Alzheimer Hastalığında Vestibüler Fonksiyon: Geleneksel Derleme

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Polat A. P., KUNTMAN B. D.

Journal of Ear Nose Throat and Head Neck Surgery, cilt.32, sa.3, ss.139-146, 2024 (Scopus, TRDizin)

Özet

The vestibular system is responsible for gaze stabilization and postural control. Recent studies have shown that vestibular function is related to various cognitive processes, too. These studies have examined the effect of the vestibular system on cognitive functions as a whole. However, it is unclear how different parts of the vestibular system, the semicircular canals and otolith organs, contribute to these processes. Several studies investigating the relationship between vestibular system and cognition have evaluated vestibular function in adults with Alzheimer’s disease and mild cognitive impairment. In this review, the current literature evaluating vestibular function in adults with cognitive impairment will be investigated and we will discuss possible causal links between the vestibular and cognitive functions. Electronic databases such as PubMed, Cochrane Library, Science Direct, and Google Scholar were searched using the keywords of “cognition”, “cognitive function”, “cognitive impairment”, “mild cognitive impairment”, “Alzheimer’s disease”, “dementia”, “vestibular system”, “vestibular function”, “vestibular function tests”, “vestibular evoked myogenic potentials”, “ocular vestibular evoked myogenic potentials”, “cervical vestibular evoked myogenic potentials”, “video head impulse test”, “videonystagmography”, “oculomotor tests” and various combinations of these keywords between January 2023 and 2024. After the titles and abstracts of the relevant articles were reviewed by the researchers, the articles related to the research topic were listed and reviewed. Although the findings obtained from the studies using different vestibular tests in Alzheimer's disease and mild cognitive impairment vary, the studies indicate the importance of the vestibular evoked myogenic potentials test in the early diagnosis of Alzheimer's disease. Further studies are needed in which vestibular functions are evaluated in adults with cognitive impairment.