Split-Brain: what we know now and why this is important for understanding consciousness

de Haan, Edward H F, Corballis, Paul M, Hillyard, Steven A, Marzi, Carlo A, Seth, Anil, Lamme, Victor A F, Volz, Lukas, Fabri, Mara, Schechter, Elizabeth, Bayne, Tim, Corballis, Michael and Pinto, Yair (2020) Split-Brain: what we know now and why this is important for understanding consciousness. Neuropsychology Review. ISSN 1040-7308

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Recently, the discussion regarding the consequences of cutting the corpus callosum (“split-brain”) has regained momentum (Corballis, Corballis, Berlucchi, & Marzi, 2018; Pinto et al., 2017; Pinto, Lamme, & de Haan, 2017; Volz & Gazzaniga, 2017; Volz, Hillyard, Miller, & Gazzaniga, 2018). This collective review paper aims to summarize the empirical common ground, to delineate the different interpretations, and to identify the remaining questions. In short, callosotomy leads to a broad breakdown of functional integration ranging from perception to attention. However, the breakdown is not absolute as several processes, such as action control, seem to remain unified. Disagreement exists about the responsible mechanisms for this remaining unity. The main issue concerns the first-person perspective of a split-brain patient. Does a split-brain harbor a split consciousness or is consciousness unified? The current consensus is that the body of evidence is insufficient to answer this question, and different suggestions are made to how future studies might address this paucity. In addition, it is suggested that the answers might not be a simple yes or no but that intermediate conceptualization need to be considered.

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Informatics
Research Centres and Groups: Sackler Centre for Consciousness Science
Subjects: B Philosophy. Psychology. Religion > BF Psychology > BF0311 Consciousness. Cognition
Depositing User: Marianne Cole
Date Deposited: 17 Mar 2020 09:08
Last Modified: 21 May 2020 14:45
URI: http://sro.sussex.ac.uk/id/eprint/90451

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