The shoulder joint (also known as the glenohumeral joint) is the main joint of the shoulder. It is a ball and socket joint that allows the arm to rotate in a circular fashion or to hinge out and up away from the body.
The shoulder is not a single joint, but a complex arrangement of bones, ligaments, muscles, and tendons that is better called the shoulder girdle. The primary function of the shoulder girdle is to give strength and range of motion to the arm.
Also, what are the 3 joints of the shoulder? Shoulder Anatomy. The shoulder is made up of three bones: the scapula (shoulder blade), clavicle (collarbone) and humerus (upper arm bone). Two joints in the shoulder allow it to move: the acromioclavicular joint, where the highest point of the scapula (acromion) meets the clavicle, and the glenohumeral joint.
Correspondingly, what does the shoulder joint do?
The Shoulder Joint. The shoulder joint (glenohumeral joint) is a ball and socket joint between the scapula and the humerus. It is the major joint connecting the upper limb to the trunk. It is one of the most mobile joints in the human body, at the cost of joint stability.
What is the name of the shoulder joint?
Why is the shoulder important?
The Importance of the Shoulder. The shoulder. In fact, the shoulder is more susceptible to injury because of its unique ability of motion. The shoulder has a tremendous amount of motion, but that vast motion also allows for lesser stability.
What are the parts of the shoulder?
Your shoulder is made up of three bones: your upper arm bone (humerus), your shoulder blade (scapula), and your collarbone (clavicle). The head of your upper arm bone fits into a rounded socket in your shoulder blade. This socket is called the glenoid.
What are the main muscles in the shoulder?
Four muscles—the supraspinatus, infraspinatus, teres minor, and subscapularis—make up the rotator cuff. It stabilizes the shoulder and holds the head of the humerus into the glenoid cavity to maintain the principal shoulder joint.
What does a shoulder joint look like?
The shoulder joint is formed where the humerus (upper arm bone) fits into the scapula (shoulder blade), like a ball and socket. The clavicle (collarbone) meets the acromion in the acromioclavicular joint. The coracoid process is a hook-like bony projection from the scapula.
What causes abduction at the shoulder?
The muscles responsible for abduction of the arm include the deltoid and the infraspinatus. Now, arm flexion is caused by the pectoralis major and the coracobrachialis, whereas arm extension is caused by the latissimus dorsi.
What ligaments are in your shoulder?
In the shoulder, the joint capsule is formed by a group of ligaments that connect the humerus to the glenoid. These ligaments are the main source of stability for the shoulder. They are the superior, middle and inferior glenohumeral ligaments. They help hold the shoulder in place and keep it from dislocating .
What is the bone that sticks out on top of shoulder?
The uppermost tendon of the rotator cuff, the supraspinatus tendon, passes beneath the bone on the top of the shoulder, called the acromion.
What are the most common shoulder injuries?
Common Shoulder Injuries & Conditions Rotator Cuff Tears. Shoulder impingement/Rotator Cuff Tendinitis. Dislocated Shoulder/Shoulder Instability. SLAP Tear. Frozen Shoulder (Adhesive Capsulitis) Shoulder Arthritis (Shoulder Osteoarthritis)
What is a shoulder girdle?
The shoulder girdle or pectoral girdle is the set of bones in the appendicular skeleton which connects to the arm on each side. In humans it consists of the clavicle and scapula; in those species with three bones in the shoulder, it consists of the clavicle, scapula, and coracoid.
What are the 4 shoulder joints?
The shoulder complex, composed of the clavicle, scapula, and humerus, is an intricately designed combination of four joints, the Glenohumeral (GH) Joint, the Acromioclavicular (AC) Joint and the Sternoclavicular (SC) Joint, and a “floating joint”, known as the Scapulothoracic (ST) joint.
What is shoulder bone?
The shoulder is made up of three bones: the scapula (shoulder blade), clavicle (collarbone) and humerus (upper arm bone). Two joints in the shoulder allow it to move: the acromioclavicular joint, where the highest point of the scapula (acromion) meets the clavicle, and the glenohumeral joint.
How many bones are in the human body?