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• W4313477651 abstract "Abstract Background Motivation is critically important for rehabilitation, exercise, and motor performance, but its neural basis is poorly understood. Recent correlational research suggests that superior frontal gyrus medial area 9 (SFG9m) may be involved in motivation for walking activity. This study experimentally evaluated brain activity changes in periods of additional motivation during walking exercise, and tested how these brain activity changes relate to self-reported exercise motivation and walking speed. Methods Non-disabled adults (N=26; 65% female; 25 ± 5 years old) performed a vigorous exercise experiment involving 20 trials of maximal speed overground walking. Half of the trials were randomized to include ‘extra motivation’ stimuli (lap timer, tracked best lap time and verbal encouragement). Wearable nearinfrared spectroscopy measured oxygenated hemoglobin responses (ΔHbO 2 ) from frontal lobe regions, including the SFG9m, primary motor, dorsolateral prefrontal, anterior prefrontal, supplementary motor and dorsal premotor cortices. Results Compared with standard trials, participants walked faster during ‘extra-motivation’ trials (2.67 vs. 2.43 m/s; p<0.0001) and had higher ΔHbO 2 in all tested brain regions. This extra motivation effect on ΔHbO 2 was greatest for SFG9m (+703 µM) compared with other regions (+45 to +354 µM; p≤0.04). Greater SFG9m activity was correlated with more self-determined motivation for exercise and faster walking speed. Conclusions Simple motivational stimuli during walking exercise seem to upregulate widespread brain regions, especially SFG9m. This could help explain the positive effects of motivational feedback on gait outcomes observed in prior rehabilitation research. Thus, these findings provide a potential biologic basis for the benefits of motivational stimuli, elicited with clinically-feasible methods during walking exercise. Future clinical studies could build on this information to develop prognostic biomarkers and test novel brain stimulation targets for enhancing exercise motivation (e.g. SFG9m)." @default.
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• W4313477651 date "2023-01-02" @default.
• W4313477651 modified "2023-10-02" @default.
• W4313477651 title "Evaluating the neural underpinnings of motivation for walking exercise" @default.
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• W4313477651 doi "https://doi.org/10.1101/2022.12.30.522346" @default.
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