Tactile exploration of virtual objects for blind and sighted people: the role of beta 1 EEG band in sensory substitution and supramodal mental mapping
Identifieur interne : 002178 ( Main/Merge ); précédent : 002177; suivant : 002179Tactile exploration of virtual objects for blind and sighted people: the role of beta 1 EEG band in sensory substitution and supramodal mental mapping
Auteurs : C. Campus ; L. Brayda ; F. De Carli ; R. Chellali ; F. Famà ; C. Bruzzo ; L. Lucagrossi [Italie] ; G. RodriguezSource :
- Journal of Neurophysiology [ 0022-3077 ] ; 2012.
Abstract
The neural correlates of exploration and cognitive mapping in blindness remain elusive. The role of visuo-spatial pathways in blind vs. sighted subjects is still under debate. In this preliminary study, we investigate, as a possible estimation of the activity in the visuo-spatial pathways, the EEG patterns of blind and blindfolded-sighted subjects during the active tactile construction of cognitive maps from virtual objects compared with rest and passive tactile stimulation. Ten blind and ten matched, blindfolded-sighted subjects participated in the study. Events were defined as moments when the finger was only stimulated (passive stimulation) or the contour of a virtual object was touched (during active exploration). Event-related spectral power and coherence perturbations were evaluated within the beta 1 band (14–18 Hz). They were then related to a subjective cognitive-load estimation required by the explorations [namely, perceived levels of difficulty (PLD)]. We found complementary cues for sensory substitution and spatial processing in both groups: both blind and sighted subjects showed, while exploring, late power decreases and early power increases, potentially associated with motor programming and touch, respectively. The latter involved occipital areas only for blind subjects (long-term plasticity) and only during active exploration, thus supporting tactile-to-visual sensory substitution. In both groups, coherences emerged among the fronto-central, centro-parietal, and occipito-temporal derivations associated with visuo-spatial processing. This seems in accordance with mental map construction involving spatial processing, sensory-motor processing, and working memory. The observed involvement of the occipital regions suggests that a substitution process also occurs in sighted subjects. Only during explorations did coherence correlate positively with PLD for both groups and in derivations, which can be related to visuo-spatial processing, supporting the existence of supramodal spatial processing independently of vision capabilities.
Url:
DOI: 10.1152/jn.00624.2011
PubMed: 22338024
PubMed Central: 3362272
Links toward previous steps (curation, corpus...)
- to stream Pmc, to step Corpus: 001417
- to stream Pmc, to step Curation: 001417
- to stream Pmc, to step Checkpoint: 001550
- to stream Ncbi, to step Merge: 001E67
- to stream Ncbi, to step Curation: 001E67
- to stream Ncbi, to step Checkpoint: 001E67
Links to Exploration step
PMC:3362272Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Tactile exploration of virtual objects for blind and sighted people: the role of beta 1 EEG band in sensory substitution and supramodal mental mapping</title><author><name sortKey="Campus, C" sort="Campus, C" uniqKey="Campus C" first="C." last="Campus">C. Campus</name><affiliation><nlm:aff id="aff1">Istituto Italiano di Tecnologia;</nlm:aff></affiliation><affiliation><nlm:aff wicri:cut="; and" id="aff3">Clinical Neurophysiology Unit, University of Genoa</nlm:aff><wicri:noCountry code="subfield">University of Genoa</wicri:noCountry></affiliation></author><author><name sortKey="Brayda, L" sort="Brayda, L" uniqKey="Brayda L" first="L." last="Brayda">L. Brayda</name><affiliation><nlm:aff id="aff1">Istituto Italiano di Tecnologia;</nlm:aff></affiliation></author><author><name sortKey="De Carli, F" sort="De Carli, F" uniqKey="De Carli F" first="F." last="De Carli">F. De Carli</name><affiliation><nlm:aff id="aff2">Institute of Molecular Bioimaging and Physiology, Consiglio Nazionale delle Ricerche;</nlm:aff><wicri:noCountry code="subfield">Consiglio Nazionale delle Ricerche</wicri:noCountry></affiliation></author><author><name sortKey="Chellali, R" sort="Chellali, R" uniqKey="Chellali R" first="R." last="Chellali">R. Chellali</name><affiliation><nlm:aff id="aff1">Istituto Italiano di Tecnologia;</nlm:aff></affiliation></author><author><name sortKey="Fama, F" sort="Fama, F" uniqKey="Fama F" first="F." last="Famà">F. Famà</name><affiliation><nlm:aff wicri:cut="; and" id="aff3">Clinical Neurophysiology Unit, University of Genoa</nlm:aff><wicri:noCountry code="subfield">University of Genoa</wicri:noCountry></affiliation></author><author><name sortKey="Bruzzo, C" sort="Bruzzo, C" uniqKey="Bruzzo C" first="C." last="Bruzzo">C. Bruzzo</name><affiliation><nlm:aff id="aff1">Istituto Italiano di Tecnologia;</nlm:aff></affiliation><affiliation><nlm:aff wicri:cut="; and" id="aff3">Clinical Neurophysiology Unit, University of Genoa</nlm:aff><wicri:noCountry code="subfield">University of Genoa</wicri:noCountry></affiliation></author><author><name sortKey="Lucagrossi, L" sort="Lucagrossi, L" uniqKey="Lucagrossi L" first="L." last="Lucagrossi">L. Lucagrossi</name><affiliation wicri:level="1"><nlm:aff id="aff4">Istituto David Chiossone onlus, Genoa, Italy</nlm:aff><country xml:lang="fr">Italie</country><wicri:regionArea>Istituto David Chiossone onlus, Genoa</wicri:regionArea><wicri:noRegion>Genoa</wicri:noRegion></affiliation></author><author><name sortKey="Rodriguez, G" sort="Rodriguez, G" uniqKey="Rodriguez G" first="G." last="Rodriguez">G. Rodriguez</name><affiliation><nlm:aff wicri:cut="; and" id="aff3">Clinical Neurophysiology Unit, University of Genoa</nlm:aff><wicri:noCountry code="subfield">University of Genoa</wicri:noCountry></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">22338024</idno><idno type="pmc">3362272</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3362272</idno><idno type="RBID">PMC:3362272</idno><idno type="doi">10.1152/jn.00624.2011</idno><date when="2012">2012</date><idno type="wicri:Area/Pmc/Corpus">001417</idno><idno type="wicri:Area/Pmc/Curation">001417</idno><idno type="wicri:Area/Pmc/Checkpoint">001550</idno><idno type="wicri:Area/Ncbi/Merge">001E67</idno><idno type="wicri:Area/Ncbi/Curation">001E67</idno><idno type="wicri:Area/Ncbi/Checkpoint">001E67</idno><idno type="wicri:doubleKey">0022-3077:2012:Campus C:tactile:exploration:of</idno><idno type="wicri:Area/Main/Merge">002178</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Tactile exploration of virtual objects for blind and sighted people: the role of beta 1 EEG band in sensory substitution and supramodal mental mapping</title><author><name sortKey="Campus, C" sort="Campus, C" uniqKey="Campus C" first="C." last="Campus">C. Campus</name><affiliation><nlm:aff id="aff1">Istituto Italiano di Tecnologia;</nlm:aff></affiliation><affiliation><nlm:aff wicri:cut="; and" id="aff3">Clinical Neurophysiology Unit, University of Genoa</nlm:aff><wicri:noCountry code="subfield">University of Genoa</wicri:noCountry></affiliation></author><author><name sortKey="Brayda, L" sort="Brayda, L" uniqKey="Brayda L" first="L." last="Brayda">L. Brayda</name><affiliation><nlm:aff id="aff1">Istituto Italiano di Tecnologia;</nlm:aff></affiliation></author><author><name sortKey="De Carli, F" sort="De Carli, F" uniqKey="De Carli F" first="F." last="De Carli">F. De Carli</name><affiliation><nlm:aff id="aff2">Institute of Molecular Bioimaging and Physiology, Consiglio Nazionale delle Ricerche;</nlm:aff><wicri:noCountry code="subfield">Consiglio Nazionale delle Ricerche</wicri:noCountry></affiliation></author><author><name sortKey="Chellali, R" sort="Chellali, R" uniqKey="Chellali R" first="R." last="Chellali">R. Chellali</name><affiliation><nlm:aff id="aff1">Istituto Italiano di Tecnologia;</nlm:aff></affiliation></author><author><name sortKey="Fama, F" sort="Fama, F" uniqKey="Fama F" first="F." last="Famà">F. Famà</name><affiliation><nlm:aff wicri:cut="; and" id="aff3">Clinical Neurophysiology Unit, University of Genoa</nlm:aff><wicri:noCountry code="subfield">University of Genoa</wicri:noCountry></affiliation></author><author><name sortKey="Bruzzo, C" sort="Bruzzo, C" uniqKey="Bruzzo C" first="C." last="Bruzzo">C. Bruzzo</name><affiliation><nlm:aff id="aff1">Istituto Italiano di Tecnologia;</nlm:aff></affiliation><affiliation><nlm:aff wicri:cut="; and" id="aff3">Clinical Neurophysiology Unit, University of Genoa</nlm:aff><wicri:noCountry code="subfield">University of Genoa</wicri:noCountry></affiliation></author><author><name sortKey="Lucagrossi, L" sort="Lucagrossi, L" uniqKey="Lucagrossi L" first="L." last="Lucagrossi">L. Lucagrossi</name><affiliation wicri:level="1"><nlm:aff id="aff4">Istituto David Chiossone onlus, Genoa, Italy</nlm:aff><country xml:lang="fr">Italie</country><wicri:regionArea>Istituto David Chiossone onlus, Genoa</wicri:regionArea><wicri:noRegion>Genoa</wicri:noRegion></affiliation></author><author><name sortKey="Rodriguez, G" sort="Rodriguez, G" uniqKey="Rodriguez G" first="G." last="Rodriguez">G. Rodriguez</name><affiliation><nlm:aff wicri:cut="; and" id="aff3">Clinical Neurophysiology Unit, University of Genoa</nlm:aff><wicri:noCountry code="subfield">University of Genoa</wicri:noCountry></affiliation></author></analytic><series><title level="j">Journal of Neurophysiology</title><idno type="ISSN">0022-3077</idno><idno type="eISSN">1522-1598</idno><imprint><date when="2012">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>The neural correlates of exploration and cognitive mapping in blindness remain elusive. The role of visuo-spatial pathways in blind vs. sighted subjects is still under debate. In this preliminary study, we investigate, as a possible estimation of the activity in the visuo-spatial pathways, the EEG patterns of blind and blindfolded-sighted subjects during the active tactile construction of cognitive maps from virtual objects compared with rest and passive tactile stimulation. Ten blind and ten matched, blindfolded-sighted subjects participated in the study. Events were defined as moments when the finger was only stimulated (passive stimulation) or the contour of a virtual object was touched (during active exploration). Event-related spectral power and coherence perturbations were evaluated within the beta 1 band (14–18 Hz). They were then related to a subjective cognitive-load estimation required by the explorations [namely, perceived levels of difficulty (PLD)]. We found complementary cues for sensory substitution and spatial processing in both groups: both blind and sighted subjects showed, while exploring, late power decreases and early power increases, potentially associated with motor programming and touch, respectively. The latter involved occipital areas only for blind subjects (long-term plasticity) and only during active exploration, thus supporting tactile-to-visual sensory substitution. In both groups, coherences emerged among the fronto-central, centro-parietal, and occipito-temporal derivations associated with visuo-spatial processing. This seems in accordance with mental map construction involving spatial processing, sensory-motor processing, and working memory. The observed involvement of the occipital regions suggests that a substitution process also occurs in sighted subjects. Only during explorations did coherence correlate positively with PLD for both groups and in derivations, which can be related to visuo-spatial processing, supporting the existence of supramodal spatial processing independently of vision capabilities.</p></div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Ticri/CIDE/explor/HapticV1/Data/Main/Merge
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002178 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Merge/biblio.hfd -nk 002178 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Ticri/CIDE
|area= HapticV1
|flux= Main
|étape= Merge
|type= RBID
|clé= PMC:3362272
|texte= Tactile exploration of virtual objects for blind and sighted people: the role of beta 1 EEG band in sensory substitution and supramodal mental mapping
}}
Pour générer des pages wiki
HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Merge/RBID.i -Sk "pubmed:22338024" \
| HfdSelect -Kh $EXPLOR_AREA/Data/Main/Merge/biblio.hfd \
| NlmPubMed2Wicri -a HapticV1
| This area was generated with Dilib version V0.6.23. |  |