Please use this identifier to cite or link to this item: http://hdl.handle.net/10316/95722
DC FieldValueLanguage
dc.contributor.authorBergström, Fredrik-
dc.contributor.authorWurm, Moritz-
dc.contributor.authorValério, Daniela Filipa Codinha-
dc.contributor.authorLingnau, Angelika-
dc.contributor.authorAlmeida, Jorge-
dc.date.accessioned2021-09-13T14:32:12Z-
dc.date.available2021-09-13T14:32:12Z-
dc.date.issued2021-03-
dc.identifier.issn00109452pt
dc.identifier.urihttp://hdl.handle.net/10316/95722-
dc.description.abstractWhen we see a manipulable object (henceforth tool) or a hand performing a grasping movement, our brain is automatically tuned to how that tool can be grasped (i.e., its affordance) or what kind of grasp that hand is performing (e.g., a power or precision grasp). However, it remains unclear where visual information related to tools or hands are transformed into abstract grasp representations. We therefore investigated where different levels of abstractness in grasp information are processed: grasp information that is invariant to the kind of stimuli that elicits it (tool-hand invariance); and grasp information that is hand-specific but viewpoint-invariant (viewpoint invariance). We focused on brain areas activated when viewing both tools and hands, i.e., the posterior parietal cortices (PPC), ventral premotor cortices (PMv), and lateral occipitotemporal cortex/posterior middle temporal cortex (LOTC/pMTG). To test for invariant grasp representations, we presented participants with tool images and grasp videos (from first or third person perspective; 1pp or 3pp) inside an MRI scanner, and cross-decoded power versus precision grasps across (i) grasp perspectives (viewpoint invariance), (ii) tool images and grasp 1pp videos (tool-hand 1pp invariance), and (iii) tool images and grasp 3pp videos (tool-hand 3pp invariance). Tool-hand 1pp, but not tool-hand 3pp, invariant grasp information was found in left PPC, whereas viewpoint-invariant information was found bilaterally in PPC, left PMv, and left LOTC/pMTG. These findings suggest different levels of abstractness-where visual information is transformed into stimuli-invariant grasp representations/tool affordances in left PPC, and viewpoint invariant but hand-specific grasp representations in the hand network.pt
dc.language.isoporpt
dc.rightsopenAccesspt
dc.subjectHands; Parietal cortex; Prehension; Tools; fMRIpt
dc.subject.meshHand Strengthpt
dc.subject.meshHumanspt
dc.subject.meshMagnetic Resonance Imagingpt
dc.subject.meshParietal Lobept
dc.subject.meshPsychomotor Performancept
dc.subject.meshBrain Mappingpt
dc.subject.meshHandpt
dc.titleDecoding stimuli (tool-hand) and viewpoint invariant grasp-type informationpt
dc.typearticle-
degois.publication.firstPage152-165pt
degois.publication.lastPage165pt
dc.peerreviewedyespt
dc.identifier.doi10.1016/j.cortex.2021.03.004pt
degois.publication.volume139pt
dc.date.embargo2021-03-01*
uc.date.periodoEmbargo0pt
item.fulltextCom Texto completo-
item.languageiso639-1pt-
item.grantfulltextopen-
crisitem.author.researchunitCenter for Research in Neuropsychology and Cognitive Behavioral Intervention-
crisitem.author.researchunitCenter for Research in Neuropsychology and Cognitive Behavioral Intervention-
crisitem.author.orcid0000-0002-5129-6927-
crisitem.author.orcid0000-0001-8062-5817-
Appears in Collections:FPCEUC - Artigos em Revistas Internacionais
Files in This Item:
File Description SizeFormat
Bergstrometal_cortex_inpress.pdf918.65 kBAdobe PDFView/Open
Show simple item record

Page view(s)

28
checked on Oct 8, 2021

Download(s)

8
checked on Oct 8, 2021

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.