Neural markers for reading-related changes in response to intervention may represent biomarkers that could inform intervention plans as a potential index of the malleability of the reading network in struggling readers. Particularly interesting is the role of activation outside the reading network, especially in executive control networks important for reading comprehension. However, it is unclear whether any intervention-related executive control changes in the brain are specific to reading tasks or reflect more domain general changes. Brain changes associated with reading gains over time were compared for a sentence comprehension task as well as for a nonlexical executive control task (a behavioral inhibition task) in upper-elementary struggling readers and in grade-matched nonstruggling readers. Functional MRI scans were conducted before and after 16 weeks of reading intervention. Participants were grouped as improvers and nonimprovers based on the consistency and size of postintervention gains across multiple posttest measures. Engagement of the right fusiform during the reading task, both before and after intervention, was related to gains from remediation. Additionally, preintervention activation in regions that are part of the default-mode network (precuneus) and the fronto-parietal network (right posterior middle temporal gyrus) separated improvers and nonimprovers from nonstruggling readers. None of these differences were observed during the nonlexical inhibitory control task, indicating that the brain changes seen related to intervention outcome in struggling readers were specific to the reading process.
Nugiela, T., Roe, M. A., Taylor, W. P., Cirino, P. T., Vaughn, S. R., Fletcher, J. M., . . . Church, J. A. (2018). Brain activity in struggling readers before intervention relates to future reading gains. Cortex. Advance online publication. doi:10.1016/j.cortex.2018.11.009
Special Education/Learning Disabilities
Journal Article/Book Chapter