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With Childhood Hemispherectomy, One Hemisphere Can Support—But is Suboptimal for—Word and Face Recognition

View ORCID ProfileMichael C. Granovetter, Leah Ettensohn, View ORCID ProfileMarlene Behrmann
doi: https://doi.org/10.1101/2020.11.06.371823
Michael C. Granovetter
1Department of Psychology, Carnegie Mellon University
2Neuroscience Institute, Carnegie Mellon University
3School of Medicine, University of Pittsburgh
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  • For correspondence: granovetter@cmu.edu
Leah Ettensohn
1Department of Psychology, Carnegie Mellon University
2Neuroscience Institute, Carnegie Mellon University
4Laboratory of Brain and Cognition, National Institute of Mental Health
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Marlene Behrmann
1Department of Psychology, Carnegie Mellon University
2Neuroscience Institute, Carnegie Mellon University
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  • ORCID record for Marlene Behrmann
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Abstract

The left and right cerebral hemispheres are important for word and face recognition, respectively—a specialization that emerges over human development. But children who have undergone a hemispherectomy develop with only one hemisphere. The question is whether this preserved hemisphere, be it left or right, can support both word and face recognition. Here, a large sample of patients with childhood hemispherectomy and age-matched controls performed word- and face-matching tasks. Controls viewed stimuli either in one visual field (restricting initial processing to one hemisphere) or, like the patients, in central vision. Across word and face tasks, patients performed comparably to controls using primarily one hemisphere, but more poorly than controls viewing stimuli centrally with both hemispheres engaged. Additionally, patients showed deficits in low-level visual processing that may explain their word/face recognition deficits relative to controls. Altogether, the findings suggest that either hemisphere alone can support word and face recognition, albeit sub-optimally.

Competing Interest Statement

The authors have declared no competing interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. This article is a US Government work. It is not subject to copyright under 17 USC 105 and is also made available for use under a CC0 license.
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Posted November 08, 2020.
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With Childhood Hemispherectomy, One Hemisphere Can Support—But is Suboptimal for—Word and Face Recognition
Michael C. Granovetter, Leah Ettensohn, Marlene Behrmann
bioRxiv 2020.11.06.371823; doi: https://doi.org/10.1101/2020.11.06.371823
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With Childhood Hemispherectomy, One Hemisphere Can Support—But is Suboptimal for—Word and Face Recognition
Michael C. Granovetter, Leah Ettensohn, Marlene Behrmann
bioRxiv 2020.11.06.371823; doi: https://doi.org/10.1101/2020.11.06.371823

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