Motion Perception During Variable-Radius Swing Motion in Darkness
Identifieur interne : 001389 ( Pmc/Curation ); précédent : 001388; suivant : 001390Motion Perception During Variable-Radius Swing Motion in Darkness
Auteurs : A. A. Rader [États-Unis] ; C. M. Oman ; D. M. Merfeld [États-Unis]Source :
- Journal of Neurophysiology [ 0022-3077 ] ; 2009.
Abstract
Using a variable-radius roll swing motion paradigm, we examined the influence of interaural (
Url:
DOI: 10.1152/jn.00116.2009
PubMed: 19625542
PubMed Central: 2775380
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A. A. Rader<affiliation><nlm:aff wicri:cut="; and" id="aff1">Man Vehicle Lab, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge</nlm:aff>
<wicri:noCountry code="subfield">Cambridge</wicri:noCountry>
</affiliation>
<affiliation wicri:level="2"><nlm:aff id="aff2">Jenks Vestibular Research Laboratory, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts</nlm:aff>
<country xml:lang="fr">États-Unis</country>
<placeName><region type="state">Massachusetts</region>
</placeName>
<wicri:cityArea>Jenks Vestibular Research Laboratory, Massachusetts Eye and Ear Infirmary, Boston</wicri:cityArea>
</affiliation>
<affiliation><nlm:aff wicri:cut="; and" id="aff1">Man Vehicle Lab, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge</nlm:aff>
<wicri:noCountry code="subfield">Cambridge</wicri:noCountry>
</affiliation>
Le document en format XML
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<series><title level="j">Journal of Neurophysiology</title>
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<front><div type="abstract" xml:lang="en"><p>Using a variable-radius roll swing motion paradigm, we examined the influence of interaural (<italic>y</italic>
-axis) and dorsoventral (<italic>z</italic>
-axis) force modulation on perceived tilt and translation by measuring perception of horizontal translation, roll tilt, and distance from center of rotation (radius) at 0.45 and 0.8 Hz using standard magnitude estimation techniques (primarily verbal reports) in darkness. Results show that motion perception was significantly influenced by both y- and <italic>z</italic>
-axis forces. During constant radius trials, subjects' perceptions of tilt and translation were generally almost veridical. By selectively pairing radius (1.22 and 0.38 m) and frequency (0.45 and 0.8 Hz, respectively), the <italic>y</italic>
-axis acceleration could be tailored in opposition to gravity so that the combined <italic>y</italic>
-axis gravitoinertial force (GIF) variation at the subject's ears was reduced to ∼0.035 m/s<sup>2</sup>
– in effect, the <italic>y</italic>
-axis GIF was “nulled” below putative perceptual threshold levels. With <italic>y</italic>
-axis force nulling, subjects overestimated their tilt angle and underestimated their horizontal translation and radius. For some <italic>y</italic>
-axis nulling trials, a radial linear acceleration at twice the tilt frequency (0.25 m/s<sup>2</sup>
at 0.9 Hz, 0.13 m/s<sup>2</sup>
at 1.6 Hz) was simultaneously applied to reduce the <italic>z</italic>
-axis force variations caused by centripetal acceleration and by changes in the <italic>z</italic>
-axis component of gravity during tilt. For other trials, the phase of this radial linear acceleration was altered to double the magnitude of the <italic>z</italic>
-axis force variations. <italic>z</italic>
-axis force nulling further increased the perceived tilt angle and further decreased perceived horizontal translation and radius relative to the <italic>y</italic>
-axis nulling trials, while <italic>z</italic>
-axis force doubling had the opposite effect. Subject reports were remarkably geometrically consistent; an observer model-based analysis suggests that perception was influenced by knowledge of swing geometry.</p>
</div>
</front>
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<pmc article-type="research-article"><pmc-comment>The publisher of this article does not allow downloading of the full text in XML form.</pmc-comment>
<front><journal-meta><journal-id journal-id-type="nlm-ta">J Neurophysiol</journal-id>
<journal-id journal-id-type="hwp">jn</journal-id>
<journal-id journal-id-type="pmc">jn</journal-id>
<journal-id journal-id-type="publisher-id">JN</journal-id>
<journal-title-group><journal-title>Journal of Neurophysiology</journal-title>
</journal-title-group>
<issn pub-type="ppub">0022-3077</issn>
<issn pub-type="epub">1522-1598</issn>
<publisher><publisher-name>American Physiological Society</publisher-name>
<publisher-loc>Bethesda, MD</publisher-loc>
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<article-id pub-id-type="doi">10.1152/jn.00116.2009</article-id>
<article-categories><subj-group subj-group-type="heading"><subject>Articles</subject>
</subj-group>
</article-categories>
<title-group><article-title>Motion Perception During Variable-Radius Swing Motion in Darkness</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Rader</surname>
<given-names>A. A.</given-names>
</name>
<xref ref-type="aff" rid="aff1"><sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff2"><sup>2</sup>
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<contrib contrib-type="author"><name><surname>Oman</surname>
<given-names>C. M.</given-names>
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<xref ref-type="aff" rid="aff1"><sup>1</sup>
</xref>
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<contrib contrib-type="author"><name><surname>Merfeld</surname>
<given-names>D. M.</given-names>
</name>
<xref ref-type="aff" rid="aff2"><sup>2</sup>
</xref>
</contrib>
<aff id="aff1"><sup>1</sup>
Man Vehicle Lab, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge; and</aff>
<aff id="aff2"><sup>2</sup>
Jenks Vestibular Research Laboratory, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts</aff>
</contrib-group>
<author-notes><corresp>Address for reprint requests and other correspondence: D. Merfeld, Jenks Vestibular Physiology Lab, Massachusetts Eye and Ear Infirmary, Rm 421, 243 Charles St., Boston, MA 02114 (E-mail: <email>dan_merfeld@meei.harvard.edu</email>
).</corresp>
</author-notes>
<pub-date pub-type="ppub"><month>10</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub"><day>22</day>
<month>7</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="pmc-release"><day>1</day>
<month>10</month>
<year>2010</year>
</pub-date>
<pmc-comment> PMC Release delay is 12 months and 0 days and was based on the
. </pmc-comment>
<volume>102</volume>
<issue>4</issue>
<fpage>2232</fpage>
<lpage>2244</lpage>
<history><date date-type="received"><day>9</day>
<month>2</month>
<year>2009</year>
</date>
<date date-type="accepted"><day>11</day>
<month>7</month>
<year>2009</year>
</date>
</history>
<permissions><copyright-statement>Copyright © 2009 The American Physiological Society</copyright-statement>
</permissions>
<self-uri xlink:title="pdf" xlink:type="simple" xlink:href="z9k01009002232.pdf"></self-uri>
<abstract><p>Using a variable-radius roll swing motion paradigm, we examined the influence of interaural (<italic>y</italic>
-axis) and dorsoventral (<italic>z</italic>
-axis) force modulation on perceived tilt and translation by measuring perception of horizontal translation, roll tilt, and distance from center of rotation (radius) at 0.45 and 0.8 Hz using standard magnitude estimation techniques (primarily verbal reports) in darkness. Results show that motion perception was significantly influenced by both y- and <italic>z</italic>
-axis forces. During constant radius trials, subjects' perceptions of tilt and translation were generally almost veridical. By selectively pairing radius (1.22 and 0.38 m) and frequency (0.45 and 0.8 Hz, respectively), the <italic>y</italic>
-axis acceleration could be tailored in opposition to gravity so that the combined <italic>y</italic>
-axis gravitoinertial force (GIF) variation at the subject's ears was reduced to ∼0.035 m/s<sup>2</sup>
– in effect, the <italic>y</italic>
-axis GIF was “nulled” below putative perceptual threshold levels. With <italic>y</italic>
-axis force nulling, subjects overestimated their tilt angle and underestimated their horizontal translation and radius. For some <italic>y</italic>
-axis nulling trials, a radial linear acceleration at twice the tilt frequency (0.25 m/s<sup>2</sup>
at 0.9 Hz, 0.13 m/s<sup>2</sup>
at 1.6 Hz) was simultaneously applied to reduce the <italic>z</italic>
-axis force variations caused by centripetal acceleration and by changes in the <italic>z</italic>
-axis component of gravity during tilt. For other trials, the phase of this radial linear acceleration was altered to double the magnitude of the <italic>z</italic>
-axis force variations. <italic>z</italic>
-axis force nulling further increased the perceived tilt angle and further decreased perceived horizontal translation and radius relative to the <italic>y</italic>
-axis nulling trials, while <italic>z</italic>
-axis force doubling had the opposite effect. Subject reports were remarkably geometrically consistent; an observer model-based analysis suggests that perception was influenced by knowledge of swing geometry.</p>
</abstract>
</article-meta>
</front>
</pmc>
</record>
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