Why the study?
Does prolonged fatiguing repetitive handgrip exercise alter ipsi- and contralateral frontal cortex oxygenation?
Does prolonged fatiguing repetitive handgrip exercise alter ipsi- and contralateral frontal cortex oxygenation?
Prolonged fatiguing maximal handgrip exercise induces a significant increase in frontal cortex oxygenation, with a higher delayed response in the ipsilateral hemisphere, suggesting complemental interaction between hemispheres.
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Prolonged fatiguing handgrip may increase bilateral frontal oxygenation; leaves open clinical relevance and hemispheric interaction mechanisms.
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.
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Kuboyama et al. (2015) studied this question.
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