Test 3, Shoulder Girdle Flashcards
The bones that connect the upper limb to the trunk are collectively termed the:
Shoulder girdle
The shoulder girdle consists of:
Clavicle and Scapula
What joint is formed by the articulation of the glenoid cavity and the head of the humerus
Scapulohumeral Joint
How many joints in the shoulder girdle? Name them.
(POSSIBLE BONUS QUESTION)
3
Scapulohumeral (SH) (ball and socket)
acromioclavicular (AC) (gliding)
sternoclavicular (SC) (double gliding)
The area of the proximal humerus located directly under the tubercles, which is the site of many fractures, is called the:
Surgical Neck
The acromial extremity of the clavicle articulates with the:
Acromion process of the scapula
The small synovial fluid-filled sacs that protect the shoulder girdle are called:
Bursae
To demonstrate the greater tubercle of the humerus on an AP of the shoulder, the epicondyles must be placed ____
Parallel to the IR
To demonstrate the lesser tubercle of the humerus on an AP of the shoulder, what patient position would you use?
Internal rotation (back of hand on hip)
For an AP of the shoulder, the central ray should be directed, at what angle?
0 Degrees
For an AP projection of the shoulder with the arm in a neutral position, how should the humeral epicondyles be positioned in regard to the IR plane?
45 degrees (obliqued)
The respiration phase for an AP projection of the shoulder should be
Suspended
What is the recommended exposure field dimensions for the AP projection of the shoulder?
10x12 inches (24x30 cm)
For an AP projection of the shoulder, the central ray should enter
1 inch (2.5cm) inferior to the coracoid process
What structure is prominently shown in profile on an AP projection of the shoulder, internal rotation position?
Lesser tubercle
Which of the following is prominently shown in profile on an AP projection of the shoulder with the humerus in external rotation?
Greater tubercle
The scapulohumeral articulation is classified as a _______ joint, _______ type.
Synovial; ball and socket
If the patient places the back of the hand against the hip, the humerus will be in what rotation?
Internal rotation
For the PA oblique projection (scapular Y) of the shoulder, the body is rotated so that the midcoronal plane is how many degrees from the IR?
45 to 60
What is the central ray angle for the PA oblique projection (scapular Y) of the shoulder joint?
0 degrees
Which structure(s) is projected in lateral profile on a PA oblique (scapular Y) projection?
Scapula
The clavicle is classified as a(n) _____ bone.
Long
The scapula is classified as a(n) _________ bone.
Flat
What anatomy is superimposed over the junction of the Y on the PA oblique (scapular Y) projection on a patient with a normal shoulder joint?
Humeral Head
The scapular Y view is especially helpful in diagnosing:
Dislocation
The lesser tubercle is situated on which surface of the humorous
Anterior, immediately below the anatomic neck
What two structures articulate to form the SC joint?
-Manubrium of sternum
- Medial end of clavicle
All of the joints of the shoulder girdle are ______ and, they are known as _____
synovial, freely movable
Which position of the hand will place the humerus in a neutral position?
Palm against the thigh
What position of the hand will place the humerus in external rotation?
Supination
What two bones connect the upper limb to the trunk?
- Clavicle (posterierly)
- Scapula (anteriorly)
For an AP projection of the shoulder, the central ray should be directed:
Perpendicular to the IR
The acromion is apart of the ______
Scapula lateral end
Which position of the hand will place the humerus in a neutral position?
Palm against the thigh
The PA oblique projection of the shoulder joint (scapular Y) is performed in which position?
- Supine/Erect
- RAO or LAO
Where is the inferior angle?
Bottom of scapula!
Where is the greater tubercle located?
lateral side of the humerus
Where is the intertubercular groove?
in between the greater and lesser tubercle
In a neutral shoulder rotation the _____ is in profile on an x ray image.
greater tubercle of the humerus
Is the humerus considered to be part of the shoulder girdle?
NO
Where does the clavicle lie?
just above the first rib
