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 39 for “"Near-infrared spectroscopy (NIRS)"”.
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The use of near-infrared spectroscopy (NIRS) in the physiological assessment of sprint triathlon.
… A single study from the review looked to utilise Near-Infrared Spectroscopy (NIRS) within triathletes. NIRS is a light-based technology that reports on the relationship between oxygen delivery and utilisation at the site of gas exchange in the muscle, a key indicator of performance in aerobic …
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Effects of muscle contractions on biceps brachii oxygenation investigated by near-infrared spectroscopy
… muscle oxygen (O2) consumption during exercise. Near-infrared spectroscopy (NIRS) allows for the noninvasive investigation of muscle oxidative metabolism during exercise at a high time resolution. However, limited studies have used NIRS to compare oxidative metabolic responses of the biceps …
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Integrated Real-Time Control And Processing Systems For Multi-Channel Near-Infrared Spectroscopy Based Brain Computer Interfaces
… improve the signal processing and anal- ysis of Near-infrared spectroscopy (NIRS) based brain-computer interfaces (BCI). These approaches were developed in conjunction with the implemen- tation of a new customized exible multi-channel NIRS based BCI hardware system (Soraghan, 2010). Using a …
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A Quantitative Study of Drug Recrystallization in Drug-In-Adhesive Transdermal Patches Using Vibrational Spectroscopy
… patches. Spectroscopic tools, including Raman spectroscopy and near-infrared spectroscopy (NIRS), were used to determine the crystallinity of drug in transdermal patches rapidly and non-destructively with a limit of detection comparable to that of the conventional solid-state characterization …
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Obesity and endothelial dysfunction: mechanisms, method development and interventions
… at rest and during exercise, investigate whether near-infrared spectroscopy (NIRS) can be used to measure muscle MBV in the obese, develop the contrast enhanced ultrasound (CEU) method in our laboratory for measuring muscle MBV of the human forearm, and use CEU to measure the MBV response to an …
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Predictive models in near-infrared spectroscopic analysis for blood hemoglobin prediction
… reagent chemicals for analysis. Alternatively, near-infrared spectroscopy (NIRS) technology can be used to measure blood hemoglobin level. NIRS is based on molecular overtone and combination vibrations produce absorption bands typically very broad, leading to complex spectral data makes the NIRS …
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A NIRS Study of Violinists and Pianists Employing Motor and Music Imageries to Assess Neural Differences in Music Perception
… music and movements. While attached to a near infrared spectroscopy (NIRS) device, violinists and pianists of diverse experience levels viewed a series of performance videos (piano, violin) and performed associated imagery tasks. It was hypothesized that musicians will show diverse levels …
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PREFRONTAL CORTEX ACTIVITY DURING ATTENTIONAL BIAS CONDITIONING WITH FEARFUL FACES: A NEAR-INFRARED SPECTROSCOPY ANALYSIS
… the prefrontal cortex (PFC) were measured using near-infrared spectroscopy (NIRS). It was hypothesized that after pairing a neutral stimulus (a colored square) with a fearful face, attentional bias toward the fearful face would transfer to the neutral stimulus. It was further hypothesized that …
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Use of near-infrared spectroscopy to identify trends in regional cerebral oxygen saturation in horses
This dissertation focuses on the use of near-infrared spectroscopy (NIRS) to identify trends in regional cerebral oxygen saturation (rSO2) in both conscious and anaesthetised healthy horses. A cerebral/somatic oximeter sensor recorded rSO2 from the dorsal sagittal sinus of 6 healthy horses. Values …
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An Assessment of Frontal Lobe Activity and BDNF Levels Following Concussion in Collegiate Athletes: A Near-Infrared Spectroscopy Study
… brain activity post-concussion. In particular, near-infrared spectroscopy (NIRS) was used to measure prefrontal cortex (PFC) activity during the dot-probe task of affective attentional bias. Brain-derived neurotrophic factor (BDNF) levels are related to frontal lobe activity, recovery from brain …
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AI-based analysis of cerebral oxygenation in preterm and term infants
… risks to their long-term neurodevelopment. Near-infrared spectroscopy (NIRS) is a non-invasive technology capable of monitoring regional cerebral oxygen saturation (rcSO2) and detecting cerebral desaturation events in neonates. However, the clinical utility of NIRS signals remains limited …
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The Association of Kangaroo Mother Care, Energy Conservation, and Bonding in Preterm Neonates
… and perfusion and oxygenation of the gut using near-infrared spectroscopy (NIRS) during 1 hour of KMC compared to incubator care.</p> <p><strong>Study design: </strong>A randomized controlled trial (RCT) examining the effects of 1-hour of KMC or 1-hour incubator care on urinary markers from …
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A Neurofeedback-based Near-infrared Spectroscopy Brain-computer Interface
Near-infrared spectroscopy (NIRS) brain-computer interfaces (BCIs) enable individuals to interact with their environment using only cognitive activities. This thesis investigates the development of a more user-friendly, intuitive, and easy to use NIRS-BCI through six research objectives: exploring …
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Changes in microvascular hematocrit during post-occlusive reactive hyperemia: descriptions and mechanisms
… (T[Hb+Mb] measured with near-infrared spectroscopy (NIRS), during post-occlusive reactive hyperemia (PORH). Mechanisms of reactive hyperemia within skeletal muscle were also explored. The investigation detailed in Chapter 2 of this dissertation found that the differing …
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Assessing Pre-Frontal Cortex Oxygenation After Sport Concussion With Near Infrared Spectroscopy
… people. To address these issues, non-invasive near infrared spectroscopy (NIRS) was used to assess pre-frontal cortex oxygenation, by measuring relative changes in oxy- (HbO2 ) and deoxy-hemoglobin (HHb), and the associated standard deviations. Resting hemoglobin, and hemoglobin changes in …
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The Ergogenic Effects of Oxygen Supplementation on Cycling Performance
… and chronic performance involved the use of both near infrared spectroscopy (NIRS) and twitch potentiation. The use of these devices alongside oxygen supplementation resulted in novel studies. Similarly, our training study was conducted on competitive level cyclists, making our results of great …
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Time-domain diffuse correlation spectroscopy: instrument prototype, preliminary measurements, and theoretical modeling
Near-infrared spectroscopy (NIRS) is an emerging diffuse optical imaging tool with both clinical and academic applications such as functional brain imaging, breast cancer detection, and cerebral health monitoring. Due to its non-invasiveness, high spatial and temporal resolution, and portability, …
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NEAR INFRARED SPECTROSCOPIC ASSESSMENT OF BONE WATER BINDING TO COLLAGEN AND MINERAL
… still in the experimental stage, vibrational spectroscopy in the near infrared region (NIR) also known as near infrared spectroscopy (NIRS) is a nondestructive modality that can spatially evaluate alterations of bone composition. NIRS is a unique nondestructive technique that produces a …
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Compression under pressure: physiological and methodological factors influencing the effect of compression garments on running economy
… Comparing measures from two portable, wireless near-infrared spectroscopy (NIRS) devices (PortaMon and MOXY) we found that the low-cost and light-weight MOXY device gave tissue oxygen saturation values at rest and during exercise that were physiologically credible and suitable for future …
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Predicting adverse neurological outcomes in infants receiving therapeutic hypothermia for hypoxic ischemic encephalopathy
… better tools are needed for prognostication. Near-infrared spectroscopy (NIRS) measures of cerebral regional oxygenation (rSO2) is a growing area of interest for prognostication. Objective: The objective of this study is to determine if changes in rSO2 measured via NIRS during TH are …
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