Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical
Identifieur interne : 001057 ( Istex/Corpus ); précédent : 001056; suivant : 001058Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical
Auteurs : Anastasopoulos ; K. Bhatia ; A. M. Bronstein ; C. D. Marsden ; M. A. GrestySource :
- Movement Disorders [ 0885-3185 ] ; 1997-09.
English descriptors
- KwdEn :
Abstract
Twenty‐nine patients with idiopathic spasmodic torticollis (ST) and matched normal control subjects were asked to align a target line to perceived earth vertical [visual vertical (VV)]. Settings were made against a whole‐field random‐dot background that was either stationary or rotating around the line of sight, and subjects performed the task upright and lying horizontally on their sides. Normal subjects were tested both head upright and after assuming a voluntary head tilt. Patients with ST set the VV close to true upright with a minimal deviation toward tilt of the head in contrast to normal subjects assuming a head tilt who set the VV in the opposite direction to the head tilt (Müller ‘E’ effect). Settings against the spinning disk were biased in the direction of rotation similarly for both subject groups. Settings made against static or spinning disk performed when subjects lay horizontally were tilted in the direction of recumbence (Aubert ‘A’ effect) similarly for both subject groups. When attempting to set the target line parallel to the long axis of the face, patients with head tilt set the line to upright, whereas normal subjects correctly estimated their tilts. One hypothesis offered to explain these results is that the patients referenced only their upright trunk for vertical and did not make use of neck proprioceptive or vestibular signals of head tilt so that all settings were made as if the trunk and head were upright. Alternatively, patients may have used only otolith signals as the reference for upright, and these are recalibrated in ST patients with head tilt. The pathological deviation becomes accepted as upright posture, and VVs and facial orientation are estimated as if the head were upright. In either case the findings indicate abnormal processing of the perception of visual verticality in ST patients.
Url:
DOI: 10.1002/mds.870120514
Links to Exploration step
ISTEX:F7F00E3519E137F4883F7514E718025BAB57E805Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical</title><author><name sortKey="Anastasopoulos" sort="Anastasopoulos" uniqKey="Anastasopoulos" last="Anastasopoulos">Anastasopoulos</name><affiliation><mods:affiliation>Department of Neurology, University of loannina Medical School loannina, Greece</mods:affiliation></affiliation><affiliation><mods:affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</mods:affiliation></affiliation></author><author><name sortKey="Bhatia, K" sort="Bhatia, K" uniqKey="Bhatia K" first="K." last="Bhatia">K. Bhatia</name><affiliation><mods:affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</mods:affiliation></affiliation></author><author><name sortKey="Bronstein, A M" sort="Bronstein, A M" uniqKey="Bronstein A" first="A. M." last="Bronstein">A. M. Bronstein</name><affiliation><mods:affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</mods:affiliation></affiliation></author><author><name sortKey="Marsden, C D" sort="Marsden, C D" uniqKey="Marsden C" first="C. D." last="Marsden">C. D. Marsden</name><affiliation><mods:affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</mods:affiliation></affiliation></author><author><name sortKey="Gresty, M A" sort="Gresty, M A" uniqKey="Gresty M" first="M. A." last="Gresty">M. A. Gresty</name><affiliation><mods:affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:F7F00E3519E137F4883F7514E718025BAB57E805</idno><date when="1997" year="1997">1997</date><idno type="doi">10.1002/mds.870120514</idno><idno type="url">https://api.istex.fr/document/F7F00E3519E137F4883F7514E718025BAB57E805/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001057</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical</title><author><name sortKey="Anastasopoulos" sort="Anastasopoulos" uniqKey="Anastasopoulos" last="Anastasopoulos">Anastasopoulos</name><affiliation><mods:affiliation>Department of Neurology, University of loannina Medical School loannina, Greece</mods:affiliation></affiliation><affiliation><mods:affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</mods:affiliation></affiliation></author><author><name sortKey="Bhatia, K" sort="Bhatia, K" uniqKey="Bhatia K" first="K." last="Bhatia">K. Bhatia</name><affiliation><mods:affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</mods:affiliation></affiliation></author><author><name sortKey="Bronstein, A M" sort="Bronstein, A M" uniqKey="Bronstein A" first="A. M." last="Bronstein">A. M. Bronstein</name><affiliation><mods:affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</mods:affiliation></affiliation></author><author><name sortKey="Marsden, C D" sort="Marsden, C D" uniqKey="Marsden C" first="C. D." last="Marsden">C. D. Marsden</name><affiliation><mods:affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</mods:affiliation></affiliation></author><author><name sortKey="Gresty, M A" sort="Gresty, M A" uniqKey="Gresty M" first="M. A." last="Gresty">M. A. Gresty</name><affiliation><mods:affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Movement Disorders</title><title level="j" type="sub">Official Journal of the Movement Disorder Society</title><title level="j" type="abbrev">Mov. Disord.</title><idno type="ISSN">0885-3185</idno><idno type="eISSN">1531-8257</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="1997-09">1997-09</date><biblScope unit="vol">12</biblScope><biblScope unit="issue">5</biblScope><biblScope unit="page" from="709">709</biblScope><biblScope unit="page" to="714">714</biblScope></imprint><idno type="ISSN">0885-3185</idno></series><idno type="istex">F7F00E3519E137F4883F7514E718025BAB57E805</idno><idno type="DOI">10.1002/mds.870120514</idno><idno type="ArticleID">MDS870120514</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0885-3185</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Dystonia</term><term>Spatial orientation</term><term>Torticollis</term><term>Vision</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="de">Twenty‐nine patients with idiopathic spasmodic torticollis (ST) and matched normal control subjects were asked to align a target line to perceived earth vertical [visual vertical (VV)]. Settings were made against a whole‐field random‐dot background that was either stationary or rotating around the line of sight, and subjects performed the task upright and lying horizontally on their sides. Normal subjects were tested both head upright and after assuming a voluntary head tilt. Patients with ST set the VV close to true upright with a minimal deviation toward tilt of the head in contrast to normal subjects assuming a head tilt who set the VV in the opposite direction to the head tilt (Müller ‘E’ effect). Settings against the spinning disk were biased in the direction of rotation similarly for both subject groups. Settings made against static or spinning disk performed when subjects lay horizontally were tilted in the direction of recumbence (Aubert ‘A’ effect) similarly for both subject groups. When attempting to set the target line parallel to the long axis of the face, patients with head tilt set the line to upright, whereas normal subjects correctly estimated their tilts. One hypothesis offered to explain these results is that the patients referenced only their upright trunk for vertical and did not make use of neck proprioceptive or vestibular signals of head tilt so that all settings were made as if the trunk and head were upright. Alternatively, patients may have used only otolith signals as the reference for upright, and these are recalibrated in ST patients with head tilt. The pathological deviation becomes accepted as upright posture, and VVs and facial orientation are estimated as if the head were upright. In either case the findings indicate abnormal processing of the perception of visual verticality in ST patients.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Dr. Anastasopoulos</name><affiliations><json:string>Department of Neurology, University of loannina Medical School loannina, Greece</json:string><json:string>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</json:string></affiliations></json:item><json:item><name>K. Bhatia</name><affiliations><json:string>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</json:string></affiliations></json:item><json:item><name>A. M. Bronstein</name><affiliations><json:string>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</json:string></affiliations></json:item><json:item><name>C. D. Marsden</name><affiliations><json:string>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</json:string></affiliations></json:item><json:item><name>M. A. Gresty</name><affiliations><json:string>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Spatial orientation</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Vision</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Dystonia</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Torticollis</value></json:item></subject><language><json:string>eng</json:string></language><abstract>Twenty‐nine patients with idiopathic spasmodic torticollis (ST) and matched normal control subjects were asked to align a target line to perceived earth vertical [visual vertical (VV)]. Settings were made against a whole‐field random‐dot background that was either stationary or rotating around the line of sight, and subjects performed the task upright and lying horizontally on their sides. Normal subjects were tested both head upright and after assuming a voluntary head tilt. Patients with ST set the VV close to true upright with a minimal deviation toward tilt of the head in contrast to normal subjects assuming a head tilt who set the VV in the opposite direction to the head tilt (Müller ‘E’ effect). Settings against the spinning disk were biased in the direction of rotation similarly for both subject groups. Settings made against static or spinning disk performed when subjects lay horizontally were tilted in the direction of recumbence (Aubert ‘A’ effect) similarly for both subject groups. When attempting to set the target line parallel to the long axis of the face, patients with head tilt set the line to upright, whereas normal subjects correctly estimated their tilts. One hypothesis offered to explain these results is that the patients referenced only their upright trunk for vertical and did not make use of neck proprioceptive or vestibular signals of head tilt so that all settings were made as if the trunk and head were upright. Alternatively, patients may have used only otolith signals as the reference for upright, and these are recalibrated in ST patients with head tilt. The pathological deviation becomes accepted as upright posture, and VVs and facial orientation are estimated as if the head were upright. In either case the findings indicate abnormal processing of the perception of visual verticality in ST patients.</abstract><qualityIndicators><score>6.6</score><pdfVersion>1.3</pdfVersion><pdfPageSize>612 x 827.759 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>1855</abstractCharCount><pdfWordCount>3600</pdfWordCount><pdfCharCount>21298</pdfCharCount><pdfPageCount>6</pdfPageCount><abstractWordCount>296</abstractWordCount></qualityIndicators><title>Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical</title><genre><json:string>Serial article</json:string></genre><host><volume>12</volume><pages><total>6</total><last>714</last><first>709</first></pages><issn><json:string>0885-3185</json:string></issn><issue>5</issue><subject><json:item><value>Article</value></json:item></subject><genre></genre><language><json:string>unknown</json:string></language><title>Movement Disorders</title><doi><json:string>10.1002/(ISSN)1531-8257</json:string></doi></host><publicationDate>1997</publicationDate><copyrightDate>1997</copyrightDate><doi><json:string>10.1002/mds.870120514</json:string></doi><id>F7F00E3519E137F4883F7514E718025BAB57E805</id><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/F7F00E3519E137F4883F7514E718025BAB57E805/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/F7F00E3519E137F4883F7514E718025BAB57E805/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/F7F00E3519E137F4883F7514E718025BAB57E805/fulltext/tei"><teiHeader type="text"><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><availability><p>Wiley Subscription Services, Inc., A Wiley Company</p></availability><date>1997</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical</title><author><persName><surname>Anastasopoulos</surname><roleName type="degree">Dr.</roleName></persName><note type="correspondence"><p>Correspondence: MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, Queen Square, London WCIN 3BC, England</p></note><affiliation>Department of Neurology, University of loannina Medical School loannina, Greece</affiliation><affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</affiliation></author><author><persName><forename type="first">K.</forename><surname>Bhatia</surname></persName><affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</affiliation></author><author><persName><forename type="first">A. M.</forename><surname>Bronstein</surname></persName><affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</affiliation></author><author><persName><forename type="first">C. D.</forename><surname>Marsden</surname></persName><affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</affiliation></author><author><persName><forename type="first">M. A.</forename><surname>Gresty</surname></persName><affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</affiliation></author></analytic><monogr><title level="j">Movement Disorders</title><title level="j" type="sub">Official Journal of the Movement Disorder Society</title><title level="j" type="abbrev">Mov. Disord.</title><idno type="pISSN">0885-3185</idno><idno type="eISSN">1531-8257</idno><idno type="DOI">10.1002/(ISSN)1531-8257</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="1997-09"></date><biblScope unit="vol">12</biblScope><biblScope unit="issue">5</biblScope><biblScope unit="page" from="709">709</biblScope><biblScope unit="page" to="714">714</biblScope></imprint></monogr><idno type="istex">F7F00E3519E137F4883F7514E718025BAB57E805</idno><idno type="DOI">10.1002/mds.870120514</idno><idno type="ArticleID">MDS870120514</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>1997</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="de"><p>Twenty‐nine patients with idiopathic spasmodic torticollis (ST) and matched normal control subjects were asked to align a target line to perceived earth vertical [visual vertical (VV)]. Settings were made against a whole‐field random‐dot background that was either stationary or rotating around the line of sight, and subjects performed the task upright and lying horizontally on their sides. Normal subjects were tested both head upright and after assuming a voluntary head tilt. Patients with ST set the VV close to true upright with a minimal deviation toward tilt of the head in contrast to normal subjects assuming a head tilt who set the VV in the opposite direction to the head tilt (Müller ‘E’ effect). Settings against the spinning disk were biased in the direction of rotation similarly for both subject groups. Settings made against static or spinning disk performed when subjects lay horizontally were tilted in the direction of recumbence (Aubert ‘A’ effect) similarly for both subject groups. When attempting to set the target line parallel to the long axis of the face, patients with head tilt set the line to upright, whereas normal subjects correctly estimated their tilts. One hypothesis offered to explain these results is that the patients referenced only their upright trunk for vertical and did not make use of neck proprioceptive or vestibular signals of head tilt so that all settings were made as if the trunk and head were upright. Alternatively, patients may have used only otolith signals as the reference for upright, and these are recalibrated in ST patients with head tilt. The pathological deviation becomes accepted as upright posture, and VVs and facial orientation are estimated as if the head were upright. In either case the findings indicate abnormal processing of the perception of visual verticality in ST patients.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>Spatial orientation</term></item><item><term>Vision</term></item><item><term>Dystonia</term></item><item><term>Torticollis</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>Article category</head><item><term>Article</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1996-03-05">Received</change><change when="1996-12-07">Registration</change><change when="1997-09">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/F7F00E3519E137F4883F7514E718025BAB57E805/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Wiley Subscription Services, Inc., A Wiley Company</publisherName><publisherLoc>Hoboken</publisherLoc></publisherInfo><doi registered="yes">10.1002/(ISSN)1531-8257</doi><issn type="print">0885-3185</issn><issn type="electronic">1531-8257</issn><idGroup><id type="product" value="MDS"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="MOVEMENT DISORDERS">Movement Disorders</title><title type="subtitle">Official Journal of the Movement Disorder Society</title><title type="short">Mov. Disord.</title></titleGroup></publicationMeta><publicationMeta level="part" position="50"><doi origin="wiley" registered="yes">10.1002/mds.v12:5</doi><numberingGroup><numbering type="journalVolume" number="12">12</numbering><numbering type="journalIssue">5</numbering></numberingGroup><coverDate startDate="1997-09">September 1997</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="14" status="forIssue"><doi origin="wiley" registered="yes">10.1002/mds.870120514</doi><idGroup><id type="unit" value="MDS870120514"></id></idGroup><countGroup><count type="pageTotal" number="6"></count></countGroup><titleGroup><title type="articleCategory">Article</title><title type="tocHeading1">Articles</title></titleGroup><copyright ownership="thirdParty">Copyright © 1997 Movement Disorder Society</copyright><eventGroup><event type="manuscriptReceived" date="1996-03-05"></event><event type="manuscriptRevised" date="1996-10-02"></event><event type="manuscriptAccepted" date="1996-12-07"></event><event type="firstOnline" date="2004-11-04"></event><event type="publishedOnlineFinalForm" date="2004-11-04"></event><event type="xmlConverted" agent="Converter:JWSART34_TO_WML3G version:2.3.2 mode:FullText source:HeaderRef result:HeaderRef" date="2010-03-09"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-02-02"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-31"></event></eventGroup><numberingGroup><numbering type="pageFirst">709</numbering><numbering type="pageLast">714</numbering></numberingGroup><correspondenceTo>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, Queen Square, London WCIN 3BC, England</correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:MDS.MDS870120514.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="2"></count><count type="tableTotal" number="2"></count><count type="referenceTotal" number="19"></count></countGroup><titleGroup><title type="main" xml:lang="en">Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical</title><title type="short" xml:lang="en">VISUAL VERTICAL IN TORTICOLLIS</title></titleGroup><creators><creator xml:id="au1" creatorRole="author" affiliationRef="#af1 #af2" corresponding="yes"><personName><honorifics>Dr.</honorifics><givenNames>D.</givenNames><familyName>Anastasopoulos</familyName></personName></creator><creator xml:id="au2" creatorRole="author" affiliationRef="#af2"><personName><givenNames>K.</givenNames><familyName>Bhatia</familyName></personName></creator><creator xml:id="au3" creatorRole="author" affiliationRef="#af2"><personName><givenNames>A. M.</givenNames><familyName>Bronstein</familyName></personName></creator><creator xml:id="au4" creatorRole="author" affiliationRef="#af2"><personName><givenNames>C. D.</givenNames><familyName>Marsden</familyName></personName></creator><creator xml:id="au5" creatorRole="author" affiliationRef="#af2"><personName><givenNames>M. A.</givenNames><familyName>Gresty</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="af1" countryCode="GR" type="organization"><unparsedAffiliation>Department of Neurology, University of loannina Medical School loannina, Greece</unparsedAffiliation></affiliation><affiliation xml:id="af2" countryCode="GB" type="organization"><unparsedAffiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en" type="author"><keyword xml:id="kwd1">Spatial orientation</keyword><keyword xml:id="kwd2">Vision</keyword><keyword xml:id="kwd3">Dystonia</keyword><keyword xml:id="kwd4">Torticollis</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="de"><title type="main">Abstract</title><p>Twenty‐nine patients with idiopathic spasmodic torticollis (ST) and matched normal control subjects were asked to align a target line to perceived earth vertical [visual vertical (VV)]. Settings were made against a whole‐field random‐dot background that was either stationary or rotating around the line of sight, and subjects performed the task upright and lying horizontally on their sides. Normal subjects were tested both head upright and after assuming a voluntary head tilt. Patients with ST set the VV close to true upright with a minimal deviation toward tilt of the head in contrast to normal subjects assuming a head tilt who set the VV in the opposite direction to the head tilt (Müller ‘E’ effect). Settings against the spinning disk were biased in the direction of rotation similarly for both subject groups. Settings made against static or spinning disk performed when subjects lay horizontally were tilted in the direction of recumbence (Aubert ‘A’ effect) similarly for both subject groups. When attempting to set the target line parallel to the long axis of the face, patients with head tilt set the line to upright, whereas normal subjects correctly estimated their tilts. One hypothesis offered to explain these results is that the patients referenced only their upright trunk for vertical and did not make use of neck proprioceptive or vestibular signals of head tilt so that all settings were made as if the trunk and head were upright. Alternatively, patients may have used only otolith signals as the reference for upright, and these are recalibrated in ST patients with head tilt. The pathological deviation becomes accepted as upright posture, and VVs and facial orientation are estimated as if the head were upright. In either case the findings indicate abnormal processing of the perception of visual verticality in ST patients.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><!--Version 0.6 générée le 3-12-2015--><mods version="3.6"><titleInfo lang="en"><title>Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>VISUAL VERTICAL IN TORTICOLLIS</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical</title></titleInfo><name type="personal"><namePart type="termsOfAddress">Dr.</namePart><namePart type="family">Anastasopoulos</namePart><affiliation>Department of Neurology, University of loannina Medical School loannina, Greece</affiliation><affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</affiliation><description>Correspondence: MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, Queen Square, London WCIN 3BC, England</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">K.</namePart><namePart type="family">Bhatia</namePart><affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A. M.</namePart><namePart type="family">Bronstein</namePart><affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">C. D.</namePart><namePart type="family">Marsden</namePart><affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M. A.</namePart><namePart type="family">Gresty</namePart><affiliation>MRC Human Movement and Balance Unit, National Hospital for Neurology and Neurosurgery, London, England</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre authority="originalCategForm">article</genre><originInfo><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><place><placeTerm type="text">Hoboken</placeTerm></place><dateIssued encoding="w3cdtf">1997-09</dateIssued><dateCaptured encoding="w3cdtf">1996-03-05</dateCaptured><dateValid encoding="w3cdtf">1996-12-07</dateValid><copyrightDate encoding="w3cdtf">1997</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">2</extent><extent unit="tables">2</extent><extent unit="references">19</extent></physicalDescription><abstract lang="de">Twenty‐nine patients with idiopathic spasmodic torticollis (ST) and matched normal control subjects were asked to align a target line to perceived earth vertical [visual vertical (VV)]. Settings were made against a whole‐field random‐dot background that was either stationary or rotating around the line of sight, and subjects performed the task upright and lying horizontally on their sides. Normal subjects were tested both head upright and after assuming a voluntary head tilt. Patients with ST set the VV close to true upright with a minimal deviation toward tilt of the head in contrast to normal subjects assuming a head tilt who set the VV in the opposite direction to the head tilt (Müller ‘E’ effect). Settings against the spinning disk were biased in the direction of rotation similarly for both subject groups. Settings made against static or spinning disk performed when subjects lay horizontally were tilted in the direction of recumbence (Aubert ‘A’ effect) similarly for both subject groups. When attempting to set the target line parallel to the long axis of the face, patients with head tilt set the line to upright, whereas normal subjects correctly estimated their tilts. One hypothesis offered to explain these results is that the patients referenced only their upright trunk for vertical and did not make use of neck proprioceptive or vestibular signals of head tilt so that all settings were made as if the trunk and head were upright. Alternatively, patients may have used only otolith signals as the reference for upright, and these are recalibrated in ST patients with head tilt. The pathological deviation becomes accepted as upright posture, and VVs and facial orientation are estimated as if the head were upright. In either case the findings indicate abnormal processing of the perception of visual verticality in ST patients.</abstract><subject lang="en"><genre>Keywords</genre><topic>Spatial orientation</topic><topic>Vision</topic><topic>Dystonia</topic><topic>Torticollis</topic></subject><relatedItem type="host"><titleInfo><title>Movement Disorders</title><subTitle>Official Journal of the Movement Disorder Society</subTitle></titleInfo><titleInfo type="abbreviated"><title>Mov. Disord.</title></titleInfo><subject><genre>article category</genre><topic>Article</topic></subject><identifier type="ISSN">0885-3185</identifier><identifier type="eISSN">1531-8257</identifier><identifier type="DOI">10.1002/(ISSN)1531-8257</identifier><identifier type="PublisherID">MDS</identifier><part><date>1997</date><detail type="volume"><caption>vol.</caption><number>12</number></detail><detail type="issue"><caption>no.</caption><number>5</number></detail><extent unit="pages"><start>709</start><end>714</end><total>6</total></extent></part></relatedItem><identifier type="istex">F7F00E3519E137F4883F7514E718025BAB57E805</identifier><identifier type="DOI">10.1002/mds.870120514</identifier><identifier type="ArticleID">MDS870120514</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 1997 Movement Disorder Society</accessCondition><recordInfo><recordOrigin>Wiley Subscription Services, Inc., A Wiley Company</recordOrigin><recordContentSource>WILEY</recordContentSource></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Santé/explor/MovDisordV3/Data/Istex/Corpus
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001057 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Corpus/biblio.hfd -nk 001057 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Santé
|area= MovDisordV3
|flux= Istex
|étape= Corpus
|type= RBID
|clé= ISTEX:F7F00E3519E137F4883F7514E718025BAB57E805
|texte= Perception of spatial orientation in spasmodic torticollis. Part 2: The visual vertical
}}
| This area was generated with Dilib version V0.6.23. |  |