The shoulder joint, being one of the most mobile joints in the body, show quite a lot of versatility in it's movements.
It shows flexion(150°-170°), extension (40°), abduction (160°-180°), adduction (30°-40°), lateral rotation (in abduction: 95°; in adduction: 70°) and medial rotation (in abduction: 40°-50°; in adduction: 70°).
Flexion is when your muscles bulge, like when you show off your biceps. Extension is the opposite of flexion, when you unbend your elbow. Abduction is when you raise your arm away from your body and adduction is when you lower your arm. Lateral rotation is when you rotate your arm outwards and medial is when you rotate your arm inwards.
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The shoulder can perform several movements, including flexion (raising the arm forward), extension (bringing the arm backward), abduction (lifting the arm to the side), adduction (bringing the arm back to the body), internal rotation (rotating the arm inwards), and external rotation (rotating the arm outwards).
The rotator cuff allows the shoulder to perform movements such as rotation, abduction, and extension.
The scientific name for the collar bone is clavicle. It is a long bone that connects the arm to the body and helps with shoulder movements.
The scientific name for the shoulder muscle is the deltoid muscle.
The scientific name for the shoulder girdle is "pectoral girdle." It is the set of bones that connect the upper limbs to the axial skeleton.
The scientific name for the collarbone is the clavicle. It is a long bone that serves as a strut between the shoulder blade and the sternum. Its main function is to provide support and mobility to the shoulder.