Normal Anatomy of the Shoulder Joint New York City
Find out more in this web based movie.
The shoulder is the most flexible joint in the body making it the most susceptible to instability and injury. It is a ‘ball-and-socket’ joint. A ‘ball’ at the top of the upper arm bone, humerus, fits neatly into a ‘socket’, called the glenoid, which is part of the shoulder blade, scapula.
The shoulder joint is made up several bones and soft tissues. It has three bones, the collarbone (clavicle), scapula, and humerus.
Humerus provides attachment to muscles of the upper arm. Scapula is the bone that connects the upper arm bone with the collarbone. It is a flat bone and roughly triangular in shape and provides attachment to the muscles of back and neck.
The clavicle is an S-shaped short bone that connects the shoulder girdle to the body (trunk). It supports the shoulder in a functional position with the axial skeleton so that the arm has maximum range of movement. It also protects major underlying nerves and blood vessels as they pass from the neck to the axilla.
The coracoid process is the extension of the scapula around the shoulder joint at the front portion of the scapula. The acromial process is the extension of scapula around the shoulder joint at the back that forms a roof, acromion.
Glenoid is the smooth shallow depression at the end of scapula that forms the socket of shoulder joint.
The soft tissues of shoulder joint include:
Rotator cuff – A group of 4 tendons make rotator cuff and it holds the head of the humerus in the socket.
Biceps tendon – The biceps tendon is a long cord-like structure which attaches the biceps muscle to the shoulder and helps to stabilize the joint.
Caraco Clavicular Ligament – This ligament connects the clavicle with the corocoid process of the scapula.
Acromio Clavicular Ligament – It connects the clavicle with the acromion process.
Glenoid labrum – The Glenoid labrum is a ring of fibro cartilage surrounding the cavity of the scapula for stabilization of the shoulder joint.
Articular cartilage or the capsule – It is a capsule that surrounds the shoulder joint and helps to keep the ball and socket normally aligned.
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COVID-19 Update from OrthoManhattan:
Your staff and doctors at OrthoManhattan are with you here in the heart of Manhattan, the U.S. epicenter of the global coronavirus pandemic. We continue to work and care for you, our patients. Given the current and worsening overload of our fine NY hospitals, we are available to triage and care for your acute orthopedic needs, be they tendon ruptures, skin lacerations, joint sprains and dislocations and broken bones. In an effort to offload our urgent and emergency care facilities, we are happy to take your calls and arrange for either a telemedicine consultation or an in-person visit and treatment at our office at 485 Madison Avenue (at 52nd street.) Stay safe and know that we are here to help keep you as healthy and well as possible.