Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 56 for “"fNIRS"”.
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Assessment of Mental Workload by EEG+fNIRS
… (EEG) and functional near-infrared spectroscopy (fNIRS) as the imaging modalities with seventeen healthy subjects performing the letter n-back task, a standard experimental paradigm related to working memory. For simultaneous EEG+fNIRS data acquisition, we introduced a state of the art whole-head …
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Examining the neurovisceral integration model through fNIRS
… RSA and functional near-infrared spectroscopy (fNIRS) were collected to investigate the relationship between prefrontal activation and vagal activity at rest and during behavioral inhibition. There are three primary aims of this study. First, examine prefrontal activation during various …
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Assessing functional connectivity in the newborn brain using fNIRS
… using functional Near Infrared Spectroscopy (fNIRS) that represents a promising non-invasive neuroimaging method for developmental studies. In the present thesis, I applied fNIRS to assess functional connectivity in term neonates. The first part of the dissertation is dedicated to …
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Multiple detector wireless FNIRS sensor to detect hemodynamic activity
… "functional Near Infra-Red Spectroscopy" (fNIRS), has opened new opportunities for the study of brain functionality. This powerful method uses the optical properties of a tissue at multiple near infra-red wavelengths to dynamically determine the levels of both oxygenated hemoglobin (HbO2) …
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Unraveling the Neurocognitive Effects of Caregiver Stress Recall: An fNIRS Investigation
Caregiving is a rewarding and strenuous activity that affects the physiological, psychological, and cognitive processes in the human body. While caregiving stress has been studied previously, these studies have overlooked a common symptom of experiencing stress: rumination. The present study …
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A Neurophysiological Investigation of Listening Effort in Normal Hearing Adults Using fNIRS and Pupillometry
… via functional near infrared spectroscopy (fNIRS) were recorded from 41 normal hearing (NH) adults. As expected, challenging vocoded speech resulted in larger pupil sizes than did non-vocoded speech, and use of semantic information reduced listening effort. Interestingly, the largest …
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Not the Pearls but the Thread: Using fNIRS Hyperscanning to Investigate Real-Life Social Interactions
… use of functional near-infrared spectroscopy (fNIRS) became increasingly popular in hyperscanning research. This trend was driven by the technique’s high tolerance for head and body movements, its noninvasive nature, and its portability, which together made it particularly suitable for …
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Quantifying Resting-State Functional Connectivity in Critically Brain-Injured Patients: A Graph-Theoretical Approach with fNIRS
Assessment of consciousness in behaviourally unresponsive patients with critical brain injuries continues to be a challenge. There remains a need for robust tools that can accurately characterize preserved cortical function and predict patient outcomes. In the present study, functional …
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Functional Near-Infrared Spectroscopy (fNIRS) Based Functional Connectivity Alterations Associated with Delirium in Critically Ill Children: An Exploratory Study
… whether functional near-infrared spectroscopy (fNIRS)-derived functional connectivity (FC) could serve as a neurophysiological marker of delirium in critically ill children. We conducted a prospective observational study in a tertiary pediatric intensive care unit (PICU) in London, Ontario, …
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High-density intraoperative brain monitoring during cardiac surgery.
Functional near-infrared spectroscopy (fNIRS) is a prominent technique that allows assessment of functional brain activity by measuring hemodynamic responses. Most existing functional brain imaging methods are only capable of examining cere-bral oxygenation at the frontal lobes during cardiac …
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Machine Learning Methods for functional Near Infrared Spectroscopy
… Functional Near Infra-Red Spectroscopy (fNIRS) device is a relatively new device that enables inference of brain activity through non-invasively pulsing infra-red light into the brain. The fNIRS device is particularly useful as it has a better spatial resolution than the …
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Medial Prefrontal Cortex fNIRS Activity while Viewing Nature and Urban Scenes: The Search for Neurological Evidence of Nature's Transcendent Self-Diminishment Effect
… used functional near-infrared spectroscopy (fNIRS) to measure activity in the medial prefrontal cortex (mPFC) which is related to the self-concept. Participants were shown 12 images divided into four blocks separated by image types. Six were entirely natural scenes (three pleasant and three …
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Say cheese! Brain imaging of texture perception
… and functional near-infrared spectroscopy (fNIRS). Thus, the work described within this thesis aimed to develop experimental procedures and implement advanced denoising and analysis techniques to make studying the brain during mastication feasible. Brain responses to stimuli that vary in …
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The impact of multiliteracies and multimodality on ESL learners: Using Neuroimaging Technologies
… used functional near infrared spectroscopy (fNIRS) to investigate the association of multiliteracies learning on adult English Second Language (ESL) students’ performance through multimodal tasks. Students’ multimodality background was collected through a technology questionnaire. Behavioural …
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Investigations into Brain-Computer Interfacing for Stroke Rehabilitation
… (EEG) and functional near-infrared spectroscopy (fNIRS) to measure brain activity are the focus of these efforts. EEG and fNIRS are relatively inexpensive, easy-to-use and portable brain measurement/ imaging systems compared to other brain imaging methods commonly found in hospital settings, such …
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Issues in the processing and analysis of functional NIRS imaging and a contrast with fMRI findings in a study of sensorimotor deactivation and connectivity
… wave functional linear infrared spectroscopy (fNIRS) of the brain usung the DYNOT system. In the second part, the same sensorimotor experiment is carried out using functional magnetic resonance imaging (fMRI) and near infrared spectroscopy in eleven of the same subjects, to establish whether …
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Neuroscience for Engineering Sustainability: Measuring Cognition During Design Ideation and Systems Thinking Among Students in Engineering
… called functional near-infrared spectroscopy (fNIRS) was used to measure cognition among engineering students thinking about sustainability. fNIRS provides an opportunity to investigate how sustainability in design influences cognition, and how different concept generation techniques help …
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Brain activation following constraint-induced movement therapy using functional near infrared spectroscopy in stroke patients
… 2001). Functional Near-Infrared Spectroscopy (fNIRS) is an novel method of mapping the brain by using light to measure changes in oxygenated and de-oxygenated hemoglobin concentration in cortical tissue (Nishimura, Rapoport, Wubbels, Downs, & Downs, 2010). Research employing imaging technology …
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