Effects of altered contractile environment on muscle shape change in the human triceps surae.

ABSTRACT: Skeletal muscles change shape when they contract. Current insights into the effects of shape change on muscle function have primarily come from experiments on isolated muscles operating at maximal activation levels. However, when muscles contract and change shape, the forces they apply onto surrounding muscles will also change. The impact of an altered contractile environment (i.e. mechanical behaviour of surrounding muscle) on muscle shape change remains unknown. To address this, we altered the mechanical contributions of the human gastrocnemii during isometric plantarflexion contractions [via changing knee angle] and determined if there were associated changes in how the muscles of the triceps surae bulged in thickness during a ramped contraction. We combined B-mode ultrasound imaging wi

SUBMITTER: Kelp NY 

PROVIDER: S-EPMC11658685 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature