Ioana Preda

Ioana Preda

Masters student in speech-pathology at l’Université de Montréal

ioana.preda@umontreal.ca

 

 

Thesis: Anatamo-functional exploration of neuropsychological profiles and communication after a right hemisphere stroke: a multiple case study

Description : Separate profiles of affected communication are observed after a right hemisphere stroke. However, no anatomical correlate related to lesion site has been described to date, suggesting the contribution of diffuse and deep brain networks. The purpose of this study is to identify and describe in the right hemisphere of the white matter and cortical areas networks matter (gray matter) suspected of having a role in language processing or executive functions. Five people who have suffered brain damage to the right hemisphere and two people without lesions participated in the study. Analysis of anatomical acquisitions (MRI) and diffusion tensor imaging (DTI) is performed to assess the damage to major systems of gray matter and white matter. Correlations analysis are then offered to investigate possible links between disease manifestations and the apparent achievement of major subcortical pathways. The results indicate that, when combined with their bundles, cortical areas at least partially determine the patterns of specific deficits: prosodic, lexical-semantic, mixed, etc. More specifically, the preservation in an individual of arched beams, longitudinal and uncinate play a key role in the group membership having no communication gap post stroke. This study presents a first exploration of the anatomical and functional right cortical and subcortical areas. It aims to provide a new look to the medical team by assisting in the identification of factors determining affected communication after a right hemisphere stroke for targeted and rapid rehabilitation orientation.