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- W3000742011 abstract "Abstract Brain lesions can provide unique insight into the neuroanatomical substrate of human consciousness. For example, brainstem lesions causing coma map to a specific region of the tegmentum. Whether specific lesion locations outside the brainstem are associated with loss of consciousness (LOC) remains unclear. Here, we investigate the topography of cortical lesions causing prolonged LOC ( N = 16), transient LOC ( N = 91), or no LOC ( N = 64). Using standard voxel lesion symptom mapping, no focus of brain damage was associated with LOC. Next, we computed the network of brain regions functionally connected to each lesion location using a large normative connectome dataset ( N = 1,000). This technique, termed lesion network mapping, can test whether lesions causing LOC map to a connected brain circuit rather than one brain region. Connectivity between cortical lesion locations and an a priori coma‐specific region of brainstem tegmentum was an independent predictor of LOC ( B = 1.2, p = .004). Connectivity to the dorsal brainstem was the only predictor of LOC in a whole‐brain voxel‐wise analysis. This relationship was driven by anticorrelation (negative correlation) between lesion locations and the dorsal brainstem. The map of regions anticorrelated to the dorsal brainstem thus defines a distributed brain circuit that, when damaged, is most likely to cause LOC. This circuit showed a slight posterior predominance and had peaks in the bilateral claustrum. Our results suggest that cortical lesions causing LOC map to a connected brain circuit, linking cortical lesions that disrupt consciousness to brainstem sites that maintain arousal." @default.
- W3000742011 created "2020-01-23" @default.
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- W3000742011 date "2020-01-06" @default.
- W3000742011 modified "2023-10-18" @default.
- W3000742011 title "Cortical lesions causing loss of consciousness are anticorrelated with the dorsal brainstem" @default.
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- W3000742011 doi "https://doi.org/10.1002/hbm.24892" @default.
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