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Contents of Consciousness Investigated as Integrated Information in Direct Human Brain Recordings

View ORCID ProfileAndrew M. Haun, Masafumi Oizumi, Christopher K. Kovach, Hiroto Kawasaki, Hiroyuki Oya, Matthew A. Howard, Ralph Adolphs, Naotsugu Tsuchiya
doi: https://doi.org/10.1101/039032
Andrew M. Haun
1Departments of Psychology and Psychiatry, University of Wisconsin-Madison, USA
2School of Psychological Sciences, Monash University, Australia
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  • ORCID record for Andrew M. Haun
Masafumi Oizumi
2School of Psychological Sciences, Monash University, Australia
3RIKEN Brain Science Institute, Japan
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Christopher K. Kovach
4Department of Neurosurgery, University of Iowa, USA
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Hiroto Kawasaki
4Department of Neurosurgery, University of Iowa, USA
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Hiroyuki Oya
4Department of Neurosurgery, University of Iowa, USA
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Matthew A. Howard
4Department of Neurosurgery, University of Iowa, USA
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Ralph Adolphs
5Division of Humanities and Social Sciences, California Institute of Technology, USA
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Naotsugu Tsuchiya
2School of Psychological Sciences, Monash University, Australia
6Monash Institute of Cognitive and Clinical Neuroscience, Monash University, Australia
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Abstract

Integrated information theory postulates that the particular way stimuli appear when we consciously experience them arises from integrated information relationships across neural populations. We investigated if such equivalence holds by testing if similar/different percepts map onto similar/different information structures. We computed integrated information structure from intracranial EEGs recorded in 6 neurosurgical patients who had electrodes implanted over posterior cortices. During recording, we dissociated subjective percepts from physical inputs in three distinct stimulus paradigms (passive viewing, continuous flash suppression, and backward masking). Unsupervised classification showed that integrated information within stimulus-selective cortical regions classified visual experiences with significant accuracy (peaking on average around 64% classification accuracy). Classification by other relevant information theoretic measures such as mutual information and entropy was consistently poorer (56% and 54% accuracy). The findings argue that concepts from integrated information theory are empirically testable, promising a potential link between conscious experience and informational structures.

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Posted February 15, 2016.
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Contents of Consciousness Investigated as Integrated Information in Direct Human Brain Recordings
Andrew M. Haun, Masafumi Oizumi, Christopher K. Kovach, Hiroto Kawasaki, Hiroyuki Oya, Matthew A. Howard, Ralph Adolphs, Naotsugu Tsuchiya
bioRxiv 039032; doi: https://doi.org/10.1101/039032
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Contents of Consciousness Investigated as Integrated Information in Direct Human Brain Recordings
Andrew M. Haun, Masafumi Oizumi, Christopher K. Kovach, Hiroto Kawasaki, Hiroyuki Oya, Matthew A. Howard, Ralph Adolphs, Naotsugu Tsuchiya
bioRxiv 039032; doi: https://doi.org/10.1101/039032

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