Linear Path Integration Deficits in Patients with Abnormal Vestibular Afference
Identifieur interne : 001846 ( Pmc/Curation ); précédent : 001845; suivant : 001847Linear Path Integration Deficits in Patients with Abnormal Vestibular Afference
Auteurs : Joeanna C. Arthur [États-Unis] ; Kathleen B. Kortte [États-Unis] ; Mark Shelhamer [États-Unis] ; Michael C. Schubert [États-Unis]Source :
- Seeing and perceiving [ 1878-4755 ] ; 2012.
Abstract
Effective navigation requires the ability to keep track of one’s location and maintain orientation during linear and angular displacements. Path integration is the process of updating the representation of body position by integrating internally-generated self-motion signals over time (e.g., walking in the dark). One major source of input to path integration is vestibular afference. We tested patients with reduced vestibular function (unilateral vestibular hypofunction, UVH), patients with aberrant vestibular function (benign paroxysmal positional vertigo, BPPV), and healthy participants (controls) on two
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DOI: 10.1163/187847612X629928
PubMed: 22726251
PubMed Central: 4086033
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<front><div type="abstract" xml:lang="en"><p id="P1">Effective navigation requires the ability to keep track of one’s location and maintain orientation during linear and angular displacements. Path integration is the process of updating the representation of body position by integrating internally-generated self-motion signals over time (e.g., walking in the dark). One major source of input to path integration is vestibular afference. We tested patients with reduced vestibular function (unilateral vestibular hypofunction, UVH), patients with aberrant vestibular function (benign paroxysmal positional vertigo, BPPV), and healthy participants (controls) on two <italic>linear path integration</italic>
tasks: experimenter-guided walking and target-directed walking. The experimenter-guided walking task revealed a systematic underestimation of self-motion signals in UVH patients compared to the other groups. However, we did not find any difference in the distance walked between the UVH group and the control group for the target-directed walking task. Results from neuropsychological testing and clinical balance measures suggest that the errors in experimenter-guided walking were not attributable to cognitive and/or balance impairments. We conclude that impairment in linear path integration in UVH patients stem from deficits in self-motion perception. Importantly, our results also suggest that patients with a UVH deficit do not lose their ability to walk accurately without vision to a memorized target location.</p>
</div>
</front>
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<front><journal-meta><journal-id journal-id-type="nlm-journal-id">101531524</journal-id>
<journal-id journal-id-type="pubmed-jr-id">37614</journal-id>
<journal-id journal-id-type="nlm-ta">Seeing Perceiving</journal-id>
<journal-id journal-id-type="iso-abbrev">Seeing Perceiving</journal-id>
<journal-title-group><journal-title>Seeing and perceiving</journal-title>
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<article-id pub-id-type="manuscript">NIHMS594464</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Article</subject>
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<title-group><article-title>Linear Path Integration Deficits in Patients with Abnormal Vestibular Afference</article-title>
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<contrib-group><contrib contrib-type="author"><name><surname>Arthur</surname>
<given-names>Joeanna C.</given-names>
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<contrib contrib-type="author"><name><surname>Kortte</surname>
<given-names>Kathleen B.</given-names>
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<contrib contrib-type="author"><name><surname>Shelhamer</surname>
<given-names>Mark</given-names>
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<given-names>Michael C.</given-names>
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<xref ref-type="aff" rid="A1">1</xref>
<xref rid="FN1" ref-type="author-notes">*</xref>
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<aff id="A1"><label>1</label>
Department of Otolaryngology – Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA</aff>
<aff id="A2"><label>2</label>
Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD, USA</aff>
<aff id="A3"><label>3</label>
Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA</aff>
<author-notes><corresp id="FN1"><label>*</label>
Correspondence concerning this article should be addressed to Michael C. Schubert at: Department of Otolaryngology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA (<email>mschube1@jhmi.edu</email>
)</corresp>
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<pub-date pub-type="nihms-submitted"><day>31</day>
<month>5</month>
<year>2014</year>
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<pub-date pub-type="ppub"><year>2012</year>
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<pub-date pub-type="pmc-release"><day>08</day>
<month>7</month>
<year>2014</year>
</pub-date>
<volume>25</volume>
<issue>2</issue>
<fpage>155</fpage>
<lpage>178</lpage>
<pmc-comment>elocation-id from pubmed: 10.1163/187847612X629928</pmc-comment>
<permissions><copyright-statement>© Koninklijke Brill NV, Leiden, 2012</copyright-statement>
<copyright-year>2012</copyright-year>
</permissions>
<abstract><p id="P1">Effective navigation requires the ability to keep track of one’s location and maintain orientation during linear and angular displacements. Path integration is the process of updating the representation of body position by integrating internally-generated self-motion signals over time (e.g., walking in the dark). One major source of input to path integration is vestibular afference. We tested patients with reduced vestibular function (unilateral vestibular hypofunction, UVH), patients with aberrant vestibular function (benign paroxysmal positional vertigo, BPPV), and healthy participants (controls) on two <italic>linear path integration</italic>
tasks: experimenter-guided walking and target-directed walking. The experimenter-guided walking task revealed a systematic underestimation of self-motion signals in UVH patients compared to the other groups. However, we did not find any difference in the distance walked between the UVH group and the control group for the target-directed walking task. Results from neuropsychological testing and clinical balance measures suggest that the errors in experimenter-guided walking were not attributable to cognitive and/or balance impairments. We conclude that impairment in linear path integration in UVH patients stem from deficits in self-motion perception. Importantly, our results also suggest that patients with a UVH deficit do not lose their ability to walk accurately without vision to a memorized target location.</p>
</abstract>
<kwd-group><kwd>Vestibular navigation</kwd>
<kwd>vestibular hypofunction</kwd>
<kwd>path integration</kwd>
<kwd>spatial orientation</kwd>
</kwd-group>
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