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Brain Lang. 2014 Sep;136:1-7. doi: 10.1016/j.bandl.2014.03.011. Epub 2014 Jul 18.

Intensive therapy induces contralateral white matter changes in chronic stroke patients with Broca's aphasia.

Author information

1
Dept. of Neurology, Neuroimaging and Stroke Recovery Laboratories, Beth Israel Deaconess Medical Center and Harvard Medical School, 330 Brookline Avenue, Boston, MA, 02215, USA.
#
Contributed equally

Abstract

Using a pre-post design, eleven chronic stroke patients with large left hemisphere lesions and nonfluent aphasia underwent diffusion tensor imaging and language testing before and after receiving 15 weeks of an intensive intonation-based speech therapy. This treated patient group was compared to an untreated patient group (n=9) scanned twice over a similar time period. Our results showed that the treated group, but not the untreated group, had reductions in fractional anisotropy in the white matter underlying the right inferior frontal gyrus (IFG, pars opercularis and pars triangularis), the right posterior superior temporal gyrus, and the right posterior cingulum. Furthermore, we found that greater improvements in speech production were associated with greater reductions in FA in the right IFG (pars opercularis). Thus, our findings showed that an intensive rehabilitation program for patients with nonfluent aphasia led to structural changes in the right hemisphere, which correlated with improvements in speech production.

KEYWORDS:

Contralateral hemisphere; Diffusion-tensor imaging; Melodic intonation therapy; Plasticity; Stroke; Training

PMID:
25041868
PMCID:
PMC4425280
DOI:
10.1016/j.bandl.2014.03.011
[Indexed for MEDLINE]
Free PMC Article

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