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Hits 1 – 5 of 5
1
Pre-treatment graph measures of a functional semantic network are associated with naming therapy outcomes in chronic aphasia
Johnson, Jeffrey P.
;
Meier, Erin L.
;
Pan, Yue
...
In: Brain Lang (2020)
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2
A lesion and connectivity-based hierarchical model of chronic aphasia recovery dissociates patients and healthy controls
Johnson, Jeffrey P.
;
Meier, Erin L.
;
Pan, Yue
. - 2019
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3
A lesion and connectivity-based hierarchical model of chronic aphasia recovery dissociates patients and healthy controls
Meier, Erin L.
;
Johnson, Jeffrey P.
;
Pan, Yue
. - : Elsevier, 2019
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4
Treatment-related changes in neural activation vary according to treatment response and extent of spared tissue in patients with chronic aphasia
Johnson, Jeffrey P.
;
Meier, Erin L.
;
Pan, Yue
;
Kiran, Swathi
In: Cortex (2019)
Abstract:
Neuroimaging studies of aphasia recovery have linked treatment-related improvements in language processing to changes in functional brain activation in left hemisphere language regions and their right hemisphere homologues. Although there is some consensus that better behavioral outcomes are achieved when activation is restored to the left hemisphere, the circumstances that dictate how and why regions in both hemispheres respond to naming therapy are still unclear. In this study, an fMRI picture-naming task was used to examine 16 regions of interest in 26 patients with chronic aphasia before and after 12 weeks of semantic naming treatment. Ten control patients who did not receive treatment and 17 healthy controls were also scanned. Naming therapy resulted in a significant increase in cortical activation, an effect that was largely driven by patients who responded most favorably to treatment, as patients who responded less favorably (as well as those who did not receive treatment) had little change in activation over time. Relative to healthy controls, patients had higher pre-treatment activation in the bilateral inferior frontal gyri (IFG) and lower activation in the bilateral angular gyri; after treatment, they had higher activation in bilateral IFG, as well as in the right middle frontal gyrus. These results suggest that the predominant effect of beneficial naming treatment was an upregulation of traditional language areas and their right hemisphere homologues and, in particular, regions associated with phonological and semantic/executive semantic processing, as well as broader domain general functions. Additionally, in some left hemisphere regions, post-treatment changes in activation were greater when there was more damage than when there was less damage, indicating that spared tissue in otherwise highly damaged regions can be modulated by treatment.
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Article
URL:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6980719/
https://doi.org/10.1016/j.cortex.2019.08.016
http://www.ncbi.nlm.nih.gov/pubmed/31627014
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5
The utility of lesion classification in predicting language and treatment outcomes in chronic stroke-induced aphasia
Meier, Erin L.
;
Johnson, Jeffrey P.
;
Pan, Yue
...
In: Brain Imaging Behav (2019)
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