Introduction of novel video-based tasks to clinical fMRI: Comparing traditional fMRI tasks with novel video-based tasks for mapping brain language areas
Abstract
Recently, blood oxygen level-dependent (BOLD) functional magnetic resonance imaging
(fMRI) has become a routine clinical procedure for localization of language and motor
brain regions and has been replacing more invasive preoperative procedures. However,
the fMRI results from these tasks are not always reproducible even from the same patient.
Evaluating the reproducibility of language and speech mapping is especially complicated
due to the complex brain circuitry that may become activated during the functional
task. Non-language areas such as sensory, attention, decision-making, and motor brain
regions may also be activated in addition to the specific language regions during
a traditional sentence-completion task. In this study, I test a new approach, which
utilizes 4-minute video-based tasks, to map language and speech brain regions for
patients undergoing brain surgery. Results from 35 subjects have shown that the video-based
task activates Wernicke’s area, as well as Broca’s area in most subjects. The computed
laterality indices, which indicate the dominant hemisphere from that functional task,
have indicated left dominance from the video-based tasks. This study has shown that
the video-based task may be an alternative method for localization of language and
speech brain regions for patients who are unable to complete the sentence-completion
task.
Type
Honors thesisDepartment
Psychology and NeurosciencePermalink
https://hdl.handle.net/10161/12384Citation
Nagatsuka, Moeko (2016). Introduction of novel video-based tasks to clinical fMRI: Comparing traditional fMRI
tasks with novel video-based tasks for mapping brain language areas. Honors thesis, Duke University. Retrieved from https://hdl.handle.net/10161/12384.Collections
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