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  4. Disconnectomics of the Rich Club Impacts Motor Recovery After Stroke
 
research article

Disconnectomics of the Rich Club Impacts Motor Recovery After Stroke

Egger, Philip  
•
Evangelista, Giorgia G.  
•
Koch, Philipp J.  
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June 1, 2021
Stroke

BACKGROUND AND PURPOSE: Structural brain networks possess a few hubs, which are not only highly connected to the rest of the brain but are also highly connected to each other. These hubs, which form a rich-club, play a central role in global brain organization. To investigate whether the concept of rich-club sheds new light on poststroke recovery, we applied a novel network-theoretical quantification of lesions to patients with stroke and compared the outcomes with what lesion size alone would indicate. METHODS: Whole-brain structural networks of 73 patients with ischemic stroke were reconstructed using diffusion-weighted imaging data. Disconnectomes, a new type of network analyses, were constructed using only those fibers that pass through the lesion. Fugl-Meyer upper extremity scores and their changes were used to determine whether the patients show natural recovery or not. RESULTS: Cluster analysis revealed 3 patient clusters: small-lesion-good-recovery, midsized-lesion-poor-recovery (MLPR), and large-lesion-poor-recovery (LLPR). The small-lesion-good-recovery consisted of subjects whose lesions were small, and whose prospects for recovery were relatively good. To explain the nondifference in recovery between the MLPR and LLPR clusters despite the difference (LLPR>MLPR) in lesion volume, we defined the metric to be the sum of the entries in the disconnectome and, more importantly, the to be the sum of all entries in the disconnectome corresponding to edges with at least one node in the rich-club. Unlike lesion volume and corticospinal tract damage (MLPRLLPR) or showed no difference for L-1. CONCLUSIONS: Smaller lesions that focus on the rich-club can be just as devastating as much larger lesions that do not focus on the rich-club, pointing to the role of the rich-club as a backbone for functional communication within brain networks and for recovery from stroke.

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Type
research article
DOI
10.1161/STROKEAHA.120.031541
Web of Science ID

WOS:000653963600046

Author(s)
Egger, Philip  
Evangelista, Giorgia G.  
Koch, Philipp J.  
Park, Chang-Hyun  
Levin-Gleba, Laura
Girard, Gabriel  
Beanato, Elena  
Lee, Jungsoo
Choirat, Christine
Guggisberg, Adrian G.
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Date Issued

2021-06-01

Published in
Stroke
Volume

52

Issue

6

Start page

2115

End page

2124

Subjects

Clinical Neurology

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Peripheral Vascular Disease

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Neurosciences & Neurology

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Cardiovascular System & Cardiology

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brain

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cluster analysis

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communication

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connectome

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diffusion-weighted imaging

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upper extremity

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proportional recovery

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brain networks

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organization

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impairment

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mild

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
UPHUMMEL  
LTS5  
Available on Infoscience
July 3, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/179740
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