Reflex Health > Glossary > Abduction

Abduction

Last updated on May 27, 2022

Is a sideways upgoing movement in the frontal plane brought about by the supraspinatus and the mid deltoid. The trapezius and serratus anterior act as a force couple which spin the scapula in an upward facing socket to give shoulder an overhead mobility. Though the range of motion for abduction is 180 degrees, the force couple is responsible for the range above the 90 degrees of elevation.