alexa Effects of muscle fiber motion on diffuse correlation spectroscopy blood flow measurements during exercise.
Medicine

Medicine

Anatomy & Physiology: Current Research

Author(s): Shang Y, Symons TB, Durduran T, Yodh AG, Yu G

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Abstract The influence of muscle fiber motion during exercise on diffuse correlation spectroscopy (DCS) measurements of skeletal muscle blood flow is explored. Isotonic (with muscle fiber motion) and isometric (without muscle fiber motion) plantar flexion exercises were performed at 30\% of maximal force on a dynamometer, and muscle blood flow was continuously monitored on the medial gastrocnemius (calf) muscle of a healthy volunteer using DCS. During exercise, dynamometer recordings including footplate position, footplate angular velocity, and plantar flexion torque were obtained. Muscle fiber motions introduced artifacts into the DCS signals, causing an overestimation of blood flow changes. We show how proper co-registration of dynamometer recordings and DCS measurements enables separation of the true blood flow responses during exercise from those affected by the motion artifacts.
This article was published in Biomed Opt Express and referenced in Anatomy & Physiology: Current Research

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