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Beyond the neural correlates of consciousness: using brain stimulation to elucidate causal mechanisms underlying conscious states and contents

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journal contribution
posted on 24.11.2021, 04:09 by Corinne Bareham, M Oxner, T Gastrell, David Podhortzer CarmelDavid Podhortzer Carmel
We are conscious beings: Somehow, the activity of our brains and nervous systems gives rise to states in which we have subjective experiences; and when we are in such states, we are aware of specific content. Researchers are only beginning to develop an understanding of the neural mechanisms underlying these phenomena. Much of the research in the last few decades has focussed on discerning the neural correlates of consciousness, using neuroimaging methods. Correlates, however, are not causes: to draw inferences about the processes that generate consciousness, rather than accompanying it, one must manipulate brain activity and examine the effects this has on conscious states and contents. One way to do so is to use brain stimulation techniques, such as transcranial magnetic stimulation (TMS). In this review, we survey the consciousness literature with a special emphasis on TMS studies. We begin by examining what is known about the neural substrates of states of consciousness–the kinds of brain activity that determine whether a person is awake, asleep, or suffering from a disorder of consciousness. We then delve into the contents of consciousness, by examining the literature on perceptual awareness. Throughout, we highlight current controversies and promising avenues for further research.

History

Preferred citation

Bareham, C. A., Oxner, M., Gastrell, T. & Carmel, D. (2021). Beyond the neural correlates of consciousness: using brain stimulation to elucidate causal mechanisms underlying conscious states and contents. Journal of the Royal Society of New Zealand, 51(1), 143-170. https://doi.org/10.1080/03036758.2020.1840405

Journal title

Journal of the Royal Society of New Zealand

Volume

51

Issue

1

Publication date

01/01/2021

Pagination

143-170

Publisher

Informa UK Limited

Publication status

Published

Online publication date

12/11/2020

ISSN

0303-6758

eISSN

1175-8899

Language

en