Related Experiment Video
Updated: Jul 6, 2026
10:09
Mapping the After-effects of Theta Burst Stimulation on the Human Auditory Cortex with Functional Imaging
Published on: September 12, 2012
14.4K
White Matter Diffusivity Predicts Change in Sight Word Reading Following Continuous Theta Burst Stimulation to the
C Nikki Arrington1,2, Ewelina Bledniak1, Brianna Kinnie3
1Department of Psychology, Georgia State University, Atlanta, GA, USA.
Neurobiology of Language (Cambridge, Mass.)
|March 13, 2026
Summary
White matter tract integrity, measured by diffusion, predicts how well reading skills improve after non-invasive brain stimulation (continuous theta burst stimulation) to the temporal-parietal junction.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Neuromodulation
Background:
- Reading relies on coordinated brain networks connected by white matter tracts.
- Non-invasive brain stimulation techniques like continuous theta burst stimulation (cTBS) can temporarily alter brain activity and influence reading ability.
Purpose of the Study:
- To investigate if white matter diffusivity predicts changes in reading efficiency after cTBS targeting the left temporal-parietal junction (TPJ).
- To explore the relationship between white matter tract integrity and behavioral outcomes following neuromodulation.
Main Methods:
- Fifty-three adults underwent cTBS targeting the left TPJ, right TPJ, or a control site.
- Reading fluency (sight word and pseudoword) was assessed before and after stimulation.
- Magnetic Resonance Imaging (MRI), including diffusion-weighted imaging, was used to measure white matter tract diffusivity.
Main Results:
- Diffusion measures of white matter tracts, including the arcuate fasciculus and corpus callosum, significantly predicted improvements in sight word efficiency after left TPJ stimulation.
- Specific tracts in both the left and right hemispheres were associated with reading efficiency changes.
Conclusions:
- White matter tract diffusivity, particularly in the reading network and its homologous regions, may influence the effectiveness of cTBS on reading efficiency.
- Individual differences in white matter integrity could explain variability in behavioral responses to neuromodulation.
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