APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -Originating from the scapula. Deltoid muscle – it originates inferiorly along the scapula spine to the acromion (and lateral third of the clavicle). Its actions include flexion and medial rotation (anterior fibres), abduction (middle fibres), extension and lateral rotation (posterior fibres) at the shoulder joint.

Detailed explanation-2: -The rotator cuff muscles all originate from the scapula and insert on the head of the humerus and move the humerus in relation to the scapula. The first letters of these muscles spell the word SITS. 1. Supraspinatus abducts the arm.

Detailed explanation-3: -The biceps brachii muscle is one of the chief muscles of the arm. The origin at the scapula and the insertion into the radius of the biceps brachii means it can act on both the shoulder joint and the elbow joint, which is why this muscle participates in a few movements of the arm.

Detailed explanation-4: -The levator scapulae is a slender skeletal muscle situated at the back and side of the neck. It originates from the transverse processes of the four uppermost cervical vertebrae; it inserts onto the upper portion of the medial border of the scapula.