Shoulder Anatomy (From Required Medscape Readings) Flashcards
List the ligaments on the anterior side of the shoulder.
• Coracohumeral • Glenohumeral: - Superior - Middle - Inferior
True or false: the extremities are referred to as the axial skeleton.
False. The extremities are the appendicular skeleton.
The clavicle articulates with the lateral border of the manubrium just superior to the ______________.
first rib
The only bone-to-bone connection between the axial and upper appendicular skeleton is the ____________.
sternoclavicular junction
The scapula and clavicle are considered parts of the upper extremity. The humerus articulates only with the scapula and the scapula articulates only with the humerus and clavicle.
The acromion is continuous with the _______________.
spine of the scapula
Describe the glenoid labrum.
It is a dense fibrocartilaginous ring that lines the rim of the glenoid and helps cover the head of the humerus.
The conoid and trapezoid ligaments are part of the ________________.
coracoclavicular ligament (which prevents dislocation of the clavicle)
Where do the rotator cuff muscles attach on the humerus?
All of them attach to the greater tubercle except the subscapularis which attaches to the lesser tubercle.
Which muscle has its origin in the glenoid fossa?
The long head of the biceps tendon
This is one of the rare examples in the body where a tendon of a muscle connects to a surface inside a joint.
Some people have variant _____________ that are more curved and prone to impingement.
acromions
Anterior dislocations of the shoulder are common in what kind of injuries?
Anterior dislocations are common when the arm is abducted, extended, and externally rotated and undergoes a traumatic impact (think of a quarterback gearing up to throw a long pass then getting tackled).
The acromioclavicular joint (AC joint) is commonly injured in what type of injuries?
When the arm is adducted and downward force is applied to the scapula, pulling the acromion downward in relation to the clavicle
