ABSTRACT
Balancing mobility and stability, the biomechanics of the shoulder provides optimal
use of the thumb and hand. More than a glenohumeral joint, the shoulder complex consists
of four joints and numerous muscles and ligaments. Injuries to the shoulder result
from overuse, extremes of motion, and excessive forces. This review describes basic
shoulder biomechanics, their role in impingement and instability, and how imaging
can detail shoulder function and dysfunction.
KEYWORDS
Shoulder problems - glenohumeral joint - rotator cuff dysfunction - overhead athlete
- biomechanics