MRCP UK EXAMINATIONS

Detailed explanation-1: -The trapezius and serratus anterior muscles work in tandem to coordinate rotation and movement of the scapula to accommodate the full range of motion of the arm. Specifically, they facilitate abduction of the arm from 90 degrees and further upwards.

Detailed explanation-2: -Deltoid muscle functions include: Arm abduction, which means raising your arm out to the side of your body. Compensation for lost arm strength if you have an injury, such as a rotator cuff tear. Flexion (moving your arm forward, toward an overhead position) and extension (moving your arm backward, behind your body).

Detailed explanation-3: -An important function of the deltoid is the stabilisation of the shoulder joint preventing subluxation or even dislocation of the head of the humerus, particularly when carrying a load. Deltoid is the prime mover of shoulder abduction. All heads of the deltoid work together to produce abduction of the Shoulder Joint.