The stabilizing potential of the supraspinatus is inhibited in tear-associated scapula shapes but can be modulated by kinematic adjustments.

ABSTRACT:

Introduction

Specific scapula shapes are associated with full-thickness tears of the supraspinatus tendon. A primary role of the supraspinatus is to actively stabilize the glenohumeral joint against muscles that generate destabilizing shear forces. Mechanisms that increase the supraspinatus load required to perform this stabilizing function may increase an individual's susceptibility to tears. Previous work has shown that tear-associated scapula shapes increase the destabilizing action of the deltoid during arm-raising, but no work has investigated whether tear-associated shapes inhibit the stabilizing potential of the supraspinatus itself.

Methods

We combined statistical shape modeling, kinematics-driven simulations of the glenohumeral joint, and a finite element model of t

SUBMITTER: Lee ECS 

PROVIDER: S-EPMC11994605 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature