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Neural processes underlying cognitive control during language production
Language production requires the coordination of multiple cognitive processes, including the selection of appropriate words to convey intended meanings and the suppression of competing or irrelevant information. These processes rely on cogni tive control mechanisms that enable speakers to successfully navigate the demands of communication. Investigating the neural underpinnings of cognitive control in language production is crucial for understanding both typical and atypical language function, as impairments in these mechanisms are associated with various language disorders, such as aphasia. This thesis aims to elucidate the neural dynamics of cog nitive control during word production by employing a combination of experimental paradigms, electrophysiological recordings, and machine learning techniques. We focus on two aspects of cognitive control: (a) the suppression of prepotent word rep resentations (Stroop-like and Picture-word interference tasks) and (b) the resolution of competition arising from the co-activation of contextually-related word represen tations (blocked-cyclic picture-naming task). By characterizing the spatiotemporal signatures of these processes and their generalizability across individuals, our anal ysis works to elucidate theories of language production and cognitive control. Fur thermore, we investigate the extent to which the neural processes underlying cog nitive control in language production overlap with those in non-linguistic domains providing insights into the domain-generality of these mechanisms.
History
Date
2024-07-01Degree Type
- Dissertation
Department
- Neuroscience Institute
Degree Name
- Doctor of Philosophy (PhD)