TIZIANA CATTAI

Dottoressa di ricerca

ciclo: XXXIII


Titolo della tesi: Leveraging brain connectivity networks to detect mental states during motor imagery

The brain is a complex network and we know that inter-areal synchronization and de-synchronization mechanisms are crucial to perform motor and cognitive tasks. Nowadays, brain functional interactions are studied in brain-computer interface (BCI) applications with more and more interest. This might have strong impact on BCI systems, typically based on univariate features which separately characterize brain regional activities. Indeed, brain connectivity features can be used to develop alternative BCIs in an effort to improve performance and to extend their real-life applicability. The ambition of this thesis is the investigation of brain functional connectivity networks during motor imagery (MI)-based BCI tasks. It aims to identify complex brain functioning, re-organization processes and timevarying dynamics, at both group and individual level. This thesis presents different developments that sequentially enrich an initially simple model in order to obtain a robust method for the study of functional connectivity networks. Experimental results on simulated and real EEG data recorded during BCI tasks prove that our proposed method well explains the variegate behaviour of brain EEG data. Specifically, it provides a characterization of brain functional mechanisms at group level, together with a measure of the separability of mental conditions at individual level. We also present a graph denoising procedure to filter data which simultaneously preserve the graph connectivity structure and enhance the signal-to-noise ratio. Since the use of a BCI system requires a dynamic interaction between user and machine, we finally propose a method to capture the evolution of time-varying data. In essence, this thesis presents a novel framework to grasp the complexity of graph functional connectivity during cognitive tasks.

Produzione scientifica

11573/1692578 - 2023 - Medical Point Clouds Enhancement at the Network Edge
Giannitrapani, Paolo; Cattai, Tiziana; Colonnese, Stefania - 04b Atto di convegno in volume
congresso: European Workshop on Visual Information Processing (EUVIP) (European Workshop on Visual Information Processing (EUVIP))
libro: 2023 11th European Workshop on Visual Information Processing (EUVIP) - (9798350342185)

11573/1624216 - 2022 - VIPDA: a visually driven point cloud denoising algorithm based on anisotropic point cloud filtering
Cattai, Tiziana; Delfino, Alessandro; Scarano, Gaetano; Colonnese, Stefania - 01a Articolo in rivista
rivista: FRONTIERS IN SIGNAL PROCESSING (Lausanne: Frontiers Media SA, [2021]-) pp. - - issn: 2673-8198 - wos: WOS:001063431000001 (0) - scopus: (0)

11573/1567133 - 2021 - Phase/amplitude synchronization of brain signals during motor imagery BCI tasks
Cattai, T.; Colonnese, S.; Corsi, M. -C.; Bassett, D. S.; Scarano, G.; De Vico Fallani, F. - 01a Articolo in rivista
rivista: IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING (IEEE / Institute of Electrical and Electronics Engineers Incorporated:445 Hoes Lane:Piscataway, NJ 08854:(800)701-4333, (732)981-0060, EMAIL: subscription-service@ieee.org, INTERNET: http://www.ieee.org, Fax: (732)981-9667) pp. 1168-1177 - issn: 1534-4320 - wos: WOS:000668834900001 (9) - scopus: 2-s2.0-85111395021 (13)

11573/1567131 - 2021 - Improving J-divergence of brain connectivity states by graph Laplacian denoising
Cattai, T.; Scarano, G.; Corsi, M.; Bassett, D. S.; De Vico Fallani, F.; Colonnese, S. - 01a Articolo in rivista
rivista: IEEE TRANSACTIONS ON SIGNAL AND INFORMATION PROCESSING OVER NETWORKS (New York, NY : IEEE Signal Processing Society [u.a.]) pp. 493-508 - issn: 2373-776X - wos: WOS:000685885900001 (5) - scopus: 2-s2.0-85111565434 (4)

11573/1434728 - 2020 - A joint Markov model for communities, connectivity and signals defined over graphs
Colonnese, S.; Di Lorenzo, P.; Cattai, T.; Scarano, G.; Fallani, F. D. V. - 01a Articolo in rivista
rivista: IEEE SIGNAL PROCESSING LETTERS (IEEE / Institute of Electrical and Electronics Engineers Incorporated:445 Hoes Lane:Piscataway, NJ 08854:(800)701-4333, (732)981-0060, EMAIL: subscription-service@ieee.org, INTERNET: http://www.ieee.org, Fax: (732)981-9667) pp. 1160-1164 - issn: 1070-9908 - wos: WOS:000550626200006 (5) - scopus: 2-s2.0-85088855971 (6)

11573/1500002 - 2020 - Network-based brain computer interfaces: principles and applications
Gonzalez-Astudillo, Juliana; Cattai, Tiziana; Bassignana, Giulia; Corsi, Marie-Constance; De Vico Fallani, Fabrizio - 01a Articolo in rivista
rivista: JOURNAL OF NEURAL ENGINEERING (Bristol : Institute of Physics Publishing, 2004-) pp. - - issn: 1741-2560 - wos: WOS:000626868300001 (19) - scopus: 2-s2.0-85102961188 (20)

11573/1350388 - 2019 - Combination of connectivity and spectral features for motor-imagery BCI
Cattai, Tiziana; Colonnese, Stefania; Corsi, Marie-Constance; Bassett, Danielle S.; Scarano, Gaetano; De Vico Fallani, Fabrizio - 04b Atto di convegno in volume
congresso: 8th Graz Brain-Computer Interface Conference 2019 (Graz)
libro: Proceedings of the 8th Graz Brain-Computer Interface Conference 2019 - (978-3-85125-682-6)

11573/1443500 - 2019 - Deep L1-PCA of time-variant data with application to brain connectivity measurements
Orru, G.; Cattai, T.; Colonnese, S.; Scarano, G.; De Vico Fallani, F.; Markopoulos, P.; Pados, D. - 04b Atto di convegno in volume
congresso: 27th European Signal Processing Conference, EUSIPCO 2019 (A Coruna Conference Center, PALEXCO, esp)
libro: European Signal Processing Conference - ()

11573/1168450 - 2018 - Characterization of mental states through node connectivity between brain signals
Cattai, Tiziana; Colonnese, Stefania; Corsi, Marie-Constance; Bassett, Danielle S.; Scarano, Gaetano; De Vico Fallani, Fabrizio - 04b Atto di convegno in volume
congresso: 26th European Signal Processing Conference, EUSIPCO 2018. (Roma)
libro: 26th European Signal Processing Conference, EUSIPCO 2018. - ()

11573/1137967 - 2018 - Green compressive sampling reconstruction in IoT networks
Colonnese, Stefania; Biagi, Mauro; Cattai, Tiziana; Cusani, Roberto; Fabrizio De Vico Fallani, ; Scarano, Gaetano - 01a Articolo in rivista
rivista: SENSORS (Basel : Molecular Diversity Preservation International (MDPI), 2001-) pp. 1-15 - issn: 1424-8220 - wos: WOS:000445712400335 (4) - scopus: 2-s2.0-85052120483 (4)

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