Changes in shear wave propagation within skeletal muscle during active and passive force generation.

ABSTRACT: Muscle force can be generated actively through changes in neural excitation, and passively through externally imposed changes in muscle length. Disease and injury can disrupt force generation, but it can be challenging to separate passive from active contributions to these changes. Ultrasound elastography is a promising tool for characterizing the mechanical properties of muscles and the forces that they generate. Most prior work using ultrasound elastography in muscle has focused on the group velocity of shear waves, which increases with increasing muscle force. Few studies have quantified the phase velocity, which depends on the viscoelastic properties of muscle. Since passive and active forces within muscle involve different structures for force transmission, we hypothesized that measur

SUBMITTER: Wang AB 

PROVIDER: S-EPMC6736689 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature