title: Ipsi- and contralateral frontal cortex oxygenation during handgrip task does not follow decrease on maximal force output.
abstract: The effect of fatiguing exercise on the ipsi- and contralateral frontal cortex has not been fully clarified. The purpose of this study was to investigate by near-infrared spectroscopy (NIRS) the frontal cortex oxygenation response to a prolonged fatiguing repetitive handgrip exercise performed at maximal voluntary contraction. It was found a significant oxyhemoglobin concentration ([HbO2]) increase (p < 0.05), accompanied by a smaller and delayed deoxyhemoglobin concentration ([Hb]) decrease (p < 0.05), in both hemispheres. Then, it was indicated higher delayed oxygenation in ipsilateral oxygenation compared to contralateral oxygenation. These results provide further evidence that the complemental interaction between the ipsilateral and contralateral cortex during the fatiguing maximal exercise.
authors.affiliation: Faculty of Business Administration, Osaka University of Commerce, 4-1-10 Mikuriyasakae-machi, 577-8505, Higashi-Osaka, Japan.
authors.forename: Naomi
authors.initials: N
authors.lastname: Kuboyama
authors.affiliation: Department of Health and Nutrition, Niigata University of Health and Welfare, 1398 Shimami-chi, 950-3198, Niigata, Kita-Ku, Japan. shibuya@nuhw.ac.jp.
authors.forename: Kenichi
authors.initials: K
authors.lastname: Shibuya
mesh_terms: D000328:Adult; D004576:Electromyography; D015444:Exercise / Q000502:physiology*; D005385:Fingers / Q000502:physiology; D005625:Frontal Lobe / Q000502:physiology*; D018737:Hand Strength / Q000502:physiology*; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D008297:Male; D010108:Oxyhemoglobins / Q000032:analysis*; D019265:Spectroscopy, Near-Infrared; D055815:Young Adult
chemical_list: D006454:Hemoglobins; D010108:Oxyhemoglobins; C100003:deoxyhemoglobin