FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4233750024> ?p ?o ?g. }

• W4233750024 endingPage "S23" @default.
• W4233750024 startingPage "S23" @default.
• W4233750024 abstract "0169 Near-infrared spectroscopy (NIRS) has increasingly been used for non-invasive determination of human mVO2 and blood flow, by interpreting signal strength and scattering coefficients for changes in oxyhemoglobin, ([O2Hb]), deoxyhemoglobin, ([HHb]) and total hemoglobin, ([tHb]). The methodological constraints of NIRS due to the confounding influences of adipose tissue thickness (ATT) have yet to be fully elucidated. In addition, to our knowledge no studies have examined these relationships within muscle contraction. PURPOSE: To determine if changes in ATT affect changes in NIRS scattering properties during dynamic knee extension exercise METHODS: Three subjects (22.5 ± 1.7 years) performed two identical continuous, incremental, upright, knee extension exercise protocols at 40 cpm. 1. Frequencydomain NIRS spectrometry (OxiplexTS, ISS) measured [O2Hb], [HHb], and [tHb] in the rectus femoris. 2. Ultrasound (VIVIDTM 3 PRO in 2-D mode) measured minimum and maximum ATT (ATTU), within a sample field at different work rates during both peak muscle contraction and between contractions. ATT was also measured with a skinfold caliper (ATTC). influence of changes in scattering were observed in the signals by comparing the patterns of response during contraction and relaxation under two conditions: With the assumption that scattering was essentially constant, and with the assumption that scattering was dynamic. RESULTS: ATTC was always larger than ATTU, +5mm, +11mm, +20mm for the three subjects. ATTU between resting and exercise conditions surprisingly often increased at the highest work rate presumably as forceful contraction drove the muscle deeper into the sample field. Longitudinal variability of ATTU within an image field during peak work rates increased as a function of the resting ATT, with the greatest variability at contraction peak. Further, pronounced movement of the underlying muscle was observed in all subjects. For the subject with the greatest ATT, the assumption regarding the temporal variability of scattering led to a sustained offset in the responses. In the other two subjects there was no effect. Further, directional variability in the changes in [O2Hb], [HHb], and [tHb] signals with contractions was observed among subjects. CONCLUSIONS: Estimation with skinfold calipers may not accurately reflect ATT. The effect of ATT on scattering can influence the absolute estimates of [O2Hb], [HHb], and [tHb]. However, the directional differences in response patterns with contractions appear to be independent of ATT, and may reflect changes in muscle architecture within the field of view of the NIRS probe. Supported by AHA Grant-in-Aid 0151183Z" @default.
• W4233750024 created "2022-05-12" @default.
• W4233750024 creator A5006547767 @default.
• W4233750024 creator A5016854598 @default.
• W4233750024 creator A5069087691 @default.
• W4233750024 creator A5088460386 @default.
• W4233750024 date "2004-05-01" @default.
• W4233750024 modified "2023-09-24" @default.
• W4233750024 title "The Influence of Adipose Tissue Thickness on Near-Infrared Spectrometry During Intra-contraction Knee Extension Exercise" @default.
• W4233750024 doi "https://doi.org/10.1249/00005768-200405001-00109" @default.
• W4233750024 hasPublicationYear "2004" @default.
• W4233750024 type Work @default.
• W4233750024 citedByCount "0" @default.
• W4233750024 crossrefType "journal-article" @default.
• W4233750024 hasAuthorship W4233750024A5006547767 @default.
• W4233750024 hasAuthorship W4233750024A5016854598 @default.
• W4233750024 hasAuthorship W4233750024A5069087691 @default.
• W4233750024 hasAuthorship W4233750024A5088460386 @default.
• W4233750024 hasBestOaLocation W42337500241 @default.
• W4233750024 hasConcept C105702510 @default.
• W4233750024 hasConcept C126322002 @default.
• W4233750024 hasConcept C136229726 @default.
• W4233750024 hasConcept C163415756 @default.
• W4233750024 hasConcept C164705383 @default.
• W4233750024 hasConcept C171089720 @default.
• W4233750024 hasConcept C185592680 @default.
• W4233750024 hasConcept C2776050358 @default.
• W4233750024 hasConcept C2778514504 @default.
• W4233750024 hasConcept C71924100 @default.
• W4233750024 hasConceptScore W4233750024C105702510 @default.
• W4233750024 hasConceptScore W4233750024C126322002 @default.
• W4233750024 hasConceptScore W4233750024C136229726 @default.
• W4233750024 hasConceptScore W4233750024C163415756 @default.
• W4233750024 hasConceptScore W4233750024C164705383 @default.
• W4233750024 hasConceptScore W4233750024C171089720 @default.
• W4233750024 hasConceptScore W4233750024C185592680 @default.
• W4233750024 hasConceptScore W4233750024C2776050358 @default.
• W4233750024 hasConceptScore W4233750024C2778514504 @default.
• W4233750024 hasConceptScore W4233750024C71924100 @default.
• W4233750024 hasIssue "Supplement" @default.
• W4233750024 hasLocation W42337500241 @default.
• W4233750024 hasLocation W42337500242 @default.
• W4233750024 hasOpenAccess W4233750024 @default.
• W4233750024 hasPrimaryLocation W42337500241 @default.
• W4233750024 hasRelatedWork W2004384633 @default.
• W4233750024 hasRelatedWork W2015127672 @default.
• W4233750024 hasRelatedWork W2048064500 @default.
• W4233750024 hasRelatedWork W2060775556 @default.
• W4233750024 hasRelatedWork W2112225791 @default.
• W4233750024 hasRelatedWork W2120447521 @default.
• W4233750024 hasRelatedWork W2173315413 @default.
• W4233750024 hasRelatedWork W2959500265 @default.
• W4233750024 hasRelatedWork W4249953205 @default.
• W4233750024 hasRelatedWork W4322731207 @default.
• W4233750024 hasVolume "36" @default.
• W4233750024 isParatext "false" @default.
• W4233750024 isRetracted "false" @default.
• W4233750024 workType "article" @default.