caa a22 4500 467942404 CHVBK 20180406153017.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1007/s00421-005-0110-8 doi (NATIONALLICENCE)springer-10.1007/s00421-005-0110-8 Heterogeneous oxygenation in nonexercising triceps surae muscle during contralateral isometric exercise [Elektronische Daten] [Masaki Mizuno, Ken Tokizawa, Isao Muraoka] To test whether changes in oxygenation of a resting skeletal muscle, evoked by a static contraction in a contralateral muscle, is uniform within a given skeletal muscle, we used near-infrared spectroscopy (NIRS). Seven subjects performed 2min static knee extension exercise at 30% of maximal voluntary contraction. Changes in oxygenated hemoglobin (HbO2) were monitored using multiple-channel NIRS (40 channels, 13 sources and 12 detectors) attached on the contralateral nonexercising triceps surae muscle. Changes in HbO2 were expressed as a percentage of total labile signals. To characterize the distribution of changes in HbO2, channels were compared between their positions on the triceps surae muscle, and represented as ‘proximal versus distal' and ‘lateral versus medial' portions. During static muscle contraction, the averaged changes in HbO2 of all channels were correlated with those in calf blood flow (plethysmography; R 2=0.188, P<0.05) and with calf vascular conductance (R 2=0.146, P<0.05). HbO2 did not differ significantly between the lateral and medial portions of the triceps surae muscle. In contrast, the decrease of HbO2 in the proximal portion of the muscle was greater than that of the distal portion (P<0.05). These results indicate that the changes in oxygenation of a resting muscle, evoked by static contraction of the contralateral muscle, are heterogeneous. Springer-Verlag, 2006 Near-infrared spectroscopy nationallicence Sympathetic nerve activity nationallicence Mizuno Masaki Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, 359-1192, Tokorozawa, Saitama, Japan aut Tokizawa Ken Graduate School of Human Sciences, Waseda University, 2-579-15 Mikajima, 359-1192, Tokorozawa, Saitama, Japan aut Muraoka Isao Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, 359-1192, Tokorozawa, Saitama, Japan aut European Journal of Applied Physiology Springer-Verlag 97/2(2006-05-01), 181-188 1439-6319 97:2<181 2006 97 421 https://doi.org/10.1007/s00421-005-0110-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-005-0110-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mizuno Masaki Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, 359-1192, Tokorozawa, Saitama, Japan aut NATIONALLICENCE 700 1- Tokizawa Ken Graduate School of Human Sciences, Waseda University, 2-579-15 Mikajima, 359-1192, Tokorozawa, Saitama, Japan aut NATIONALLICENCE 700 1- Muraoka Isao Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, 359-1192, Tokorozawa, Saitama, Japan aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 97/2(2006-05-01), 181-188 1439-6319 97:2<181 2006 97 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer