A novel approach to muscle functional recovery monitoring by its free vibration measurement

Abstract

The study shows a potential to monitor functional recovery of a muscle by its natural frequency measurement. A novel approach is presented, in which vibrations of the muscle of interest are measured in a contactless manner using laser displacement sensor and the measured vibration signals are analyzed by an advanced technique of experimental modal analysis to extract fundamental natural frequency of the muscle with high accuracy. A case study of functional status recovery monitoring of a rectus femoris muscle, which become anthropic after ACL reconstruction, is presented.