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Full-Text Articles in Psychology
Language Abilities As A Function Of Lateralization Of Language-Specific Brain Networks, Jacey Anderson
Language Abilities As A Function Of Lateralization Of Language-Specific Brain Networks, Jacey Anderson
Honors Scholar Theses
The strength of hemispheric lateralization appears to be a good predictor of language abilities in children with developmental language impairments. Studies of healthy adults, in contrast, have generally failed to identify any association between degree of lateralization and language abilities, perhaps due to limited sensitivity to individual differences in standardized language assessments. This study used fMRI to measure the lateralization of functional task-engaged language networks in 25 healthy right-handed adults. Linear regressions examined lateralization indices (LI) of language activation in inferior temporal, superior temporal, and frontal brain networks, as a function of syntactic complexity (via story retelling), a grammaticality judgment …
Data-Driven Approach To Dynamic Resting State Functional Connectivity In Post-Traumatic Stress Disorder, Carissa Weis
Data-Driven Approach To Dynamic Resting State Functional Connectivity In Post-Traumatic Stress Disorder, Carissa Weis
Theses and Dissertations
Posttraumatic stress disorder (PTSD) is a heterogenous psychological disorder that may result from exposure to a traumatic event. Using functional magnetic resonance imaging (fMRI), symptoms of PTSD have been associated with aberrations in brain networks that emerge in the absence of a given cognitive demand or task, called resting state networks. Most previous research in resting state networks and PTSD has focused on aberrations in the static functional connectivity among specific regions of interest (ROI) in the brain and within canonical networks constrained by a priori hypotheses. However, dynamic fMRI, an approach that examines changes in brain network characteristics over …
Neural Mechanisms Of Cognitive Individual Difference: An Investigation Of The Human Connectome Project, Shelly Renee Cooper
Neural Mechanisms Of Cognitive Individual Difference: An Investigation Of The Human Connectome Project, Shelly Renee Cooper
Arts & Sciences Electronic Theses and Dissertations
Considering individual differences in task activation functional magnetic resonance imaging (t-fMRI) can be challenging because they may arise from variability in activity in brain regions, in the tasks themselves, or some combination thereof. Delineating sources of between-subjects variance is particularly important for cognitive control where task goals are at the forefront. Here we applied structural equation modeling (SEM) to the Human Connectome Project to examine if activity could be partitioned into separable brain and task individual difference dimensions. A series of SEMs were defined with varying numbers of latent factors, where the inputs were parcels of two cognitive control-related brain …