Article (Scientific journals)
Consistent Gradient of Performance and Decoding of Stimulus Type and Valence From Local and Network Activity.
Hesse, Eugenia; Mikulan, Ezequiel; Sitt, Jacobo D. et al.
2019In IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society, 27 (4), p. 619-629
Peer reviewed
 

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Abstract :
[en] The individual differences approach focuses on the variation of behavioral and neural signatures across subjects. In this context, we searched for intracranial neural markers of performance in three individuals with distinct behavioral patterns (efficient, borderline, and inefficient) in a dual-valence task assessing facial and lexical emotion recognition. First, we performed a preliminary study to replicate well-established evoked responses in relevant brain regions. Then, we examined time series data and network connectivity, combined with multivariate pattern analyses and machine learning, to explore electrophysiological differences in resting-state versus task-related activity across subjects. Next, using the same methodological approach, we assessed the neural decoding of performance for different dimensions of the task. The classification of time series data mirrored the behavioral gradient across subjects for stimulus type but not for valence. However, network-based measures reflected the subjects' hierarchical profiles for both stimulus types and valence. Therefore, this measure serves as a sensitive marker for capturing distributed processes such as emotional valence discrimination, which relies on an extended set of regions. Network measures combined with classification methods may offer useful insights to study single subjects and understand inter-individual performance variability. Promisingly, this approach could eventually be extrapolated to other neuroscientific techniques.
Disciplines :
Neurosciences & behavior
Author, co-author :
Hesse, Eugenia
Mikulan, Ezequiel
Sitt, Jacobo D.
Garcia, Maria Del Carmen
Silva, Walter
Ciraolo, Carlos
Vaucheret, Esteban
Raimondo, Federico ;  Université de Liège - ULiège > Consciousness-Coma Science Group
Baglivo, Fabricio
Adolfi, Federico
Herrera, Eduar
Bekinschtein, Tristan A.
Petroni, Agustin
Lew, Sergio
Sedeno, Lucas
Garcia, Adolfo M.
Ibanez, Agustin
More authors (7 more) Less
Language :
English
Title :
Consistent Gradient of Performance and Decoding of Stimulus Type and Valence From Local and Network Activity.
Publication date :
2019
Journal title :
IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society
ISSN :
1534-4320
eISSN :
1558-0210
Volume :
27
Issue :
4
Pages :
619-629
Peer reviewed :
Peer reviewed
Available on ORBi :
since 17 January 2020

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