Show:
SC/AC Joint
GH Joint
ST Joint
Muscles
Landmarks
100
Is the SC joint a congruent or incongruent joint?
What is incongruent
100
What is the most common direction in which the GH joint dislocates?
What is anteriorly (inferiorly)
100
What provides stability at the ST joint?
What is muscles
100
What are the upward rotators of the scapula?
What is lower/upper portion of trapezius and serratus anterior
100
What anatomical landmark is the red line pointing to?
What is deltoid tuberosity
200
Which joint is more likely to dislocate the AC joint or the SC joint?
What is AC joint
200
What two structures attach to the glenoid labrum?
What is glenohumeral ligaments and long head of biceps brachiii
200
What kind of joint is the ST joint?
What is not a true anatomic joint
200
What muscle is most vulnerable to injury due to its association with dynamic stability?
What is supraspinatus
200
What is the anatomical landmark hidden by the square?
What is scapular notch
300
What kind of joint is the SC joint?
What is Saddle (synovial joint)
300
What is the angle of inclination? What is considered a normal angle of inclination?
What is axis through the humeral head and neck in relation to an axis through the shaft of the humerus. Normal is 130 - 150 degrees.
300
SC joint retraction and AC joint ER causes what motion at the scapula?
What is scapula retraction
300
What muscle creates the greatest Fx component when raising the arm?
What is deltoid
300
What anatomical landmark is hidden by the square?
What is conoid tubercle
400
What are the 3 main ligaments of the SC joint?
What is anterior sternoclavicular ligament, posterior sternoclavicular ligament, and costoclavicular ligament
400
What are the four ligaments of the GH joint?
What is superior, middle, and inferior GH ligaments and coracohumeral ligament
400
What is the resting position of the scapula?
What is IR 35 degrees, anteriorly tilt 10-15 degrees, UR 5 - 10 degrees
400
What is the origin, insertion, and action of the subscapularis?
What is subscapularis fossa of scapule to the lesser tubercle. Action is IR
400
What anatomical landmark is the square hiding?
What is bicipital groove
500
What is the primary function of the AC joint?
What is provide scapular rotation (increases UE motion, keeps the scapula congruent and stable on the thorax)
500
What three structures run beneath the subacromial space?
What is subacromial bursa, rotator cuff tendons (supraspinatus), and portion of tendon of the long head of the biceps brachii
500
What are the 3 functions of the ST joint?
What is orient the glenoid fossa for optimal contact with the humeral head of the maneuvering arm, add range to elevation of the arm, provide a stable base for controlled motions between the humeral head and glenoid fossa
500
What is the origin and insertion of the pectoralis major?
What is medial half of clavicle, manubrium, and cartilage of 1 - 6 ribs attaching to the greater tubercle of the humerus
500
What anatomical landmark is hidden behind the square?
What is supraglenoid fossa