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Distributed affective space represents multiple emotion categories across the brain

Heini Saarimäki, Lara Farzaneh Ejtehadian, Enrico Glerean, liro P. Jääskeläinen, Patrik Vuilleumier, Mikko Sams, Lauri Nummenmaa
doi: https://doi.org/10.1101/123521
Heini Saarimäki
1Department of Neuroscience and Biomedical Engineering; School of Science, Aalto University, FI-00076 Espoo, Finland
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Lara Farzaneh Ejtehadian
1Department of Neuroscience and Biomedical Engineering; School of Science, Aalto University, FI-00076 Espoo, Finland
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Enrico Glerean
1Department of Neuroscience and Biomedical Engineering; School of Science, Aalto University, FI-00076 Espoo, Finland
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liro P. Jääskeläinen
1Department of Neuroscience and Biomedical Engineering; School of Science, Aalto University, FI-00076 Espoo, Finland
2Advanced Magnetic Imaging Centre, Aalto NeuroImaging; School of Science, Aalto University, Fl-00076 Espoo, Finland
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Patrik Vuilleumier
3Department of Neurology, University of Geneva, CH-1211 Geneva, Switzerland
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Mikko Sams
1Department of Neuroscience and Biomedical Engineering; School of Science, Aalto University, FI-00076 Espoo, Finland
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Lauri Nummenmaa
4University of Turku, Turku PET Center and Department of Psychology, FI-20520 Turku; Finland
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Abstract

The functional organization of human emotion systems as well as their neuroanatomical basis and segregation in the brain remains unresolved. Here we used pattern classification and hierarchical clustering to reveal and characterize the organization of discrete emotion categories in the human brain. We induced 14 emotions (6 “basic”, such as fear and anger; and 8 “non-basic”, such as shame and gratitude) and a neutral state in participants using guided mental imagery while their brain activity was measured with functional magnetic resonance imaging (fMRI). Twelve out of 14 emotions could be reliably classified from the fMRI signals. All emotions engaged a multitude of brain areas, primarily in midline cortices including anterior and posterior cingulate and precuneus, in subcortical regions, and in motor regions including cerebellum and premotor cortex. Similarity of subjective emotional experiences was associated with similarity of the corresponding neural activation patterns. We conclude that the emotions included in the study have discrete neural bases characterized by specific, distributed activation patterns in widespread cortical and subcortical circuits, and highlight both overlaps and differences in the locations of these for each emotion. Locally differentiated engagement of these globally shared circuits defines the unique neural fingerprint activity pattern and the corresponding subjective feeling associated with each emotion.

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Posted April 05, 2017.
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Distributed affective space represents multiple emotion categories across the brain
Heini Saarimäki, Lara Farzaneh Ejtehadian, Enrico Glerean, liro P. Jääskeläinen, Patrik Vuilleumier, Mikko Sams, Lauri Nummenmaa
bioRxiv 123521; doi: https://doi.org/10.1101/123521
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Distributed affective space represents multiple emotion categories across the brain
Heini Saarimäki, Lara Farzaneh Ejtehadian, Enrico Glerean, liro P. Jääskeläinen, Patrik Vuilleumier, Mikko Sams, Lauri Nummenmaa
bioRxiv 123521; doi: https://doi.org/10.1101/123521

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