Frontiers in Human Neuroscience (Feb 2024)

Effects of rhythmic visual cues on cortical activation and functional connectivity features during stepping: an fNIRS study

  • Jiajia Wu,
  • Jiajia Wu,
  • Jiajia Wu,
  • Huilin Zhou,
  • Huilin Zhou,
  • Hao Chen,
  • Hao Chen,
  • Hao Chen,
  • Wensong Jiang,
  • Wensong Jiang,
  • Wensong Jiang,
  • Xuelian Wang,
  • Xuelian Wang,
  • Xuelian Wang,
  • Tao Meng,
  • Tao Meng,
  • Tao Meng,
  • Chaowen Wu,
  • Chaowen Wu,
  • Chaowen Wu,
  • Li Li,
  • Yuemin Wu,
  • Weinv Fan,
  • Changcheng Shi,
  • Changcheng Shi,
  • Changcheng Shi,
  • Guokun Zuo,
  • Guokun Zuo,
  • Guokun Zuo

DOI
https://doi.org/10.3389/fnhum.2024.1337504
Journal volume & issue
Vol. 18

Abstract

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IntroductionRhythmic visual cues (RVCs) may influence gait initiation by modulating cognition resources. However, it is unknown how RVCs modulate cognitive resources allocation during gait movements. This study focused on investigating the effects of RVCs on cortical hemodynamic response features during stepping to evaluate the changes of cognitive resources.MethodsWe recorded cerebral hemoglobin concentration changes of 14 channels in 17 healthy subjects using functional near-infrared spectroscopy (fNIRS) during stepping tasks under exposure to RVCs and non-rhythmic visual cues (NRVCs). We reported mean oxygenated hemoglobin (HbO) concentration changes, β-values, and functional connectivity (FC) between channels.ResultsThe results showed that, the RVC conditions revealed lower HbO responses compared to the NRVC conditions during the preparation and early stepping. Correspondingly, the β-values reflected that RVCs elicited lower hemodynamic responses than NRVCs, and there was a decreasing trend in stimulus-evoked cortical activation as the task progressed. However, the FC between channels were stronger under RVCs than under NRVCs during the stepping progress, and there were more significant differences in FC during the early stepping.DiscussionIn conclusion, there were lower cognitive demand and stronger FC under RVC conditions than NRVC conditions, which indicated higher efficiency of cognitive resources allocation during stepping tasks. This study may provide a new insight for further understanding the mechanism on how RVCs alleviate freezing of gait.

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