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Posterior axio-appendicular shoulder muscles. The posterior axio-appendicular muscles are divided into two groups; extrinsic and intrinsic. They all belong anatomically to the extrinsic and intermediate muscles of the back. Extrinsic muscles are further subdivided into superficial and deep layers.
The glenohumeral, or shoulder, joint is a synovial joint that attaches the upper limb to the axial skeleton. It is a ball-and-socket joint, formed between the glenoid fossa of scapula (gleno-) and the head of humerus (-humeral).
The shoulder joint is an extremely mobile joint, with a wide range of movement possible: Extension (upper limb backwards in sagittal plane) – posterior deltoid, latissimus dorsi and teres major. Flexion (upper limb forwards in sagittal plane) – pectoralis major, anterior deltoid and coracobrachialis.
Anatomy of the Upper Limb: Shoulder Muscles - Posterior View. Stanford Center for Health Education. 90.7K subscribers. 104. From an accredited US healthcare educator. Learn how experts define ...
Explore Innerbody's 3D anatomical model of the shoulder joint, the most flexible joint in the entire human body.
Explore the anatomy and function of the shoulder joint muscles with Innerbody's interactive 3D model. The muscles of the shoulder bridge the transitions from the torso into the head/neck area and into the upper extremities of the arms and hands.
The clavicular (anterior) and scapular spinal (posterior) parts are both unipennate and converge directly onto the inserting tendon. Before jumping into the origins and insertions of the deltoid muscle, learn the main muscles of the upper limb with the following quiz.
Acromioclavicular (AC) joint: A plane synovial joint that connects the shoulder blade (i.e., acromion of the scapula) to the collar bone (i.e., clavicle) stabilized by ligaments. Scapulothoracic articulation: Gliding articulation of the scapula over the posterior thoracic cage.
Introduction. The shoulder joint, also known as the glenohumeral joint, is a ball and socket joint with the most extensive range of motion in the human body. The shoulder muscles have a wide range of functions, including abduction, adduction, flexion, extension, internal and external rotation. [1] .
Anatomy Of The Shoulder Summary. The main components of the anatomy of the shoulder are: Shoulder Bones: humerus, clavicle and scapula; Shoulder Muscles: including the rotator cuff muscles; Shoulder Ligaments: thick, flexible bands of connective tissue that link bone to bone for stability