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Proceedings Paper

Functional near-infrared spectroscopy as a window to cardiovascular health
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Paper Abstract

The temporal evolution of cortical activation patterns during a handgrip task inducing forearm muscle fatigue was studied with functional near-infrared spectroscopy (fNIRS). Brain activation patterns mapped over the prefrontal and sensorimotor cortices (111 channels) and concurrent fatigue measurements, assessed by a force sensor, were studied for a group of physical active subjects versus an age-matched healthy, but non-exercising group. Thirteen young adults (18-35 years old) were recruited who performed intermittent handgrip contractions for 3.5s alternating with 6.5s of rest for 120 blocks with their dominant hand. Observed differences in activation and connectivity in the primary motor cortex (M1), premotor and supplementary motor cortex (PMC/SMA), and prefrontal cortex (PFC) in both hemispheres hinted at differences in compensatory tactics used by the brain based on available physical resources that depend on physical activity. Furthermore, our study demonstrated strengthened FC throughout the entire duration of the fatigue-inducing handgrip task. Ultimately, this ongoing study will provide baseline measurements on the brain’s compensatory patterns for follow-up work on older individuals with impaired cardiovascular health performing the fatiguing handgrip task.

Paper Details

Date Published: 1 March 2019
PDF: 15 pages
Proc. SPIE 10864, Clinical and Translational Neurophotonics 2019, 108640U (1 March 2019); doi: 10.1117/12.2506658
Show Author Affiliations
Elizabeth Lyde, The Univ. of Texas at Arlington (United States)
Xinlong Wang, The Univ. of Texas at Arlington (United States)
Hanli Liu, The Univ. of Texas at Arlington (United States)
Kytai Nguyen, The Univ. of Texas at Arlington (United States)
Paul Fadel, The Univ. of Texas at Arlington (United States)
George Alexandrakis, The Univ. of Texas at Arlington (United States)

Published in SPIE Proceedings Vol. 10864:
Clinical and Translational Neurophotonics 2019
Steen J. Madsen; Victor X. D. Yang; Nitish V. Thakor, Editor(s)

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