shoulder muscles diagram

August 03, 2026

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Written By: Chloe Wilson BSc (Hons) Physiotherapy Reviewed By: SPE Medical Review Board A shoulder pain diagram is a really useful tool when it comes to working out what is causing pain in your shoulder. Different structures, muscles, tendons, ligaments, joints and bursa, are stressed in different areas of the shoulder, so where you feel pain provides important clues. The human shoulder is made up of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone) as well as associated muscles, ligaments and tendons. The articulations between the bones of the shoulder make up the shoulder joints. The shoulder is one of the biggest joints in the human body, involved in almost all upper-body movements. Also called the glenohumeral joint, it is a ball-and-socket joint capable of the widest range of movements in the body, controlled by the six shoulder muscles. The shoulder muscles are responsible for maintaining the widest range of motion of any joint in your body. This flexibility is also what makes the shoulder prone to instability and injury. Muscles, ... The arm extends from the shoulder to the wrist, including the upper arm and forearm. Different muscles may work together in intricate ways to help the arm, wrists, fingers, and hands function. Knowing ... For related background details, please refer to our report on how to wire a circuit. Shoulder joints can have their fair share of problems. Learn about common problems and injuries, and tips on how to treat a painful shoulder. Here are symptoms that often serve as warning signs of a shoulder injury: Sudden and sharp pain. Decreased range of motion. Pain along with swelling, pressure or bruising. Constant pain or pain that continues to worsen. Pain that prevents you from falling asleep or wakes you up.