info:eu-repo/grantAgreement/EC/H2020/802553/EU/Contentotopic mapping: the topographical organization of object knowledge in the brain

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Primary Data

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Project title
info:eu-repo/grantAgreement/EC/H2020/802553/EU/Contentotopic mapping: the topographical organization of object knowledge in the brain
Code
info:eu-repo/grantAgreement/EC/H2020/802553/EU/Contentotopic mapping: the topographical organization of object knowledge in the brain
Project Coordinator
Organization
 
Status
On going
Start date
01-02-2019
Expected Completion
31-01-2024
 
Co-Investigator(s)

Description

Abstract
Our ability to recognize an object amongst many others is one of the most important features of the human mind. However, object recognition requires tremendous computational effort, as we need to solve a complex and recursive environment with ease and proficiency. This challenging feat is dependent on the implementation of an effective organization of knowledge in the brain. In ContentMAP I will put forth a novel understanding of how object knowledge is organized in the brain, by proposing that this knowledge is topographically laid out in the cortical surface according to object-related dimensions that code for different types of representational content – I will call this contentotopic mapping. To study this fine-grain topography, I will use a combination of fMRI, behavioral, and neuromodulation approaches. I will first obtain patterns of neural and cognitive similarity between objects, and from these extract object-related dimensions using a dimensionality reduction technique. I will then parametrically manipulate these dimensions with an innovative use of a visual field mapping technique, and test how functional selectivity changes across the cortical surface according to an object’s score on a target dimension. Moreover, I will test the tuning function of these contentotopic maps. Finally, to mirror the complexity of implementing a high-dimensional manifold onto a 2D cortical sheet, I will aggregate the topographies for the different dimensions into a composite map, and develop an encoding model to predict neural signatures for each object. To sum up, ContentMAP will have a dramatic impact in the cognitive sciences by describing how the stuff of concepts is represented in the brain, and providing a complete description of how fine-grain representations and functional selectivity within high-level complex processes are topographically implemented. Website - http://proactionlab.fpce.uc.pt/
 
Keyword(s)
natural sciences; biological sciences; neurobiology; cognitive neuroscience; social sciences; psychology; cognitive psychology

Publications
(All)

Results 1-9 of 9 (Search time: 0.011 seconds).

Issue DateTitleAuthor(s)TypeAccess
12021Knowing how to do it or doing it? A double dissociation between tool-gesture production and tool-gesture knowledgeValério, Daniela ; Santana, Isabel ; Sousa, Diana Aguiar de; Schu, Guilherme ; Leal, Gabriela; Pavão Martins, Isabel; Almeida, Jorge articleembargoedAccess
214-Sep-2023Neural and behavioral signatures of the multidimensionality of manipulable object processingAlmeida, Jorge ; Fracasso, Alessio; Kristensen, Stephanie ; Valério, Daniela ; Bergström, Fredrik ; Chakravarthi, Ramakrishna ; Tal, Zohar ; Walbrin, JonathanarticleopenAccess
315-Dec-2023Neuroplastic changes in functional wiring in sensory cortices of the congenitally deaf: A network analysisRuttorf, Michaela ; Tal, Zohar ; Amaral, Lénia ; Fang, Fang ; Bi, Yanchao ; Almeida, Jorge articleopenAccess
42022Optimistic Youth: Young Adults Predicted a Faster Decrease in Risk during COVID-19 Emergency State in PortugalScaletti, Sara ; Duarte, Inês ; Senra, Catarina ; Almeida, Jorge ; Ferreira, António Jorge ; Walbrin, Jon; Pilacinski, Artur articleopenAccess
52021Overlapping but distinct: Distal connectivity dissociates hand and tool processing networksAmaral, L. ; Bergström, F. ; Almeida, J. articleembargoedAccess
67-Feb-2023The cerebellum is causally involved in episodic memory under agingAlmeida, Armando ; Martins, Ana R.; Amaral, Lénia ; Valério, Daniela ; Bukhari, Qasim; Schu, Guilherme ; Nogueira, Joana; Spínola, Mónica ; Soleimani, Ghazaleh; Fernandes, Filipe ; Silva, Ana R. ; Fregni, Felipe ; Simis, Marcel ; Simões, Mário; Peres, André articleopenAccess
72021The contributions of the ventral and the dorsal visual streams to the automatic processing of action relations of familiar and unfamiliar object pairsXu, Shan; Liu, Xingyu; Almeida, Jorge ; Heinke, DietmararticleopenAccess
826-Oct-2022The effects of Semantic Distance in Object Recognition: A feature-based and behavioral approachSantos, Francisco Figueiredo FortemasterThesisopenAccess
92021Within-category representational stability through the lens of manipulable objectsLee, Dongha ; Almeida, Jorge articleopenAccess