Muscle activation variability in relation to functional internal rotation in reverse total shoulder arthroplasty.

Background: The use of reverse total shoulder arthroplasty (rTSA) has increased in recent years, thanks to its application versatility. Despite this increase, there exists a significant variability in postoperative functional internal rotation (fIR), affecting patients' daily life independence. Previous literature investigated patient-related, kinematical, and surgical parameters to understand the variability in fIR outcome.

Wearable Tendon Kinetics.

This study introduces a noninvasive wearable system for investigating tendon loading patterns during outdoor locomotion on variable terrain. The system leverages shear wave tensiometry, which is a new approach for assessing tendon load by tracking wave speed within the tissue. Our wearable tensiometry system uses a battery-operated piezoelectric actuator to induce micron-scale shear waves in a tendon.

The effects of sub-threshold vibratory noise on visuomotor entrainment during human walking and standing in a virtual reality environment.

Humans will naturally synchronize their posture to the motion of a visual surround, but it is unclear if this visuomotor entrainment can be attenuated with an increased sensitivity to somatosensory information. Sub-threshold vibratory noise applied to the Achilles tendons has proven to enhance ankle proprioception through the phenomenon of stochastic resonance. Our purpose was to compare visuomotor entrainment during walking and standing, and to understand how this entrainment might be attenuated by applying sub-threshold vibratory noise over the Achilles tendons.