CP2 UE MIDTERM EXAM
The shoulder girdle is comprised of which four joints? - ANSWER Sternoclavicular
(S/C)
Acromioclavicular (A/C)
Glenohumeral (G/H)
Scapulothoracic Articulation (S/T)
Sternoclavicular joint is what kind of joint - ANSWER Complex saddle joint
Increases the congruity of the highly irregular joint surfaces - ANSWER
Sternoclavicular joint articular disc
Ligaments of the sternoclavicular joint - ANSWER SC ligament, interclavicular,
Costoclavicular
Achieved by placing the arm down at the side of the body - ANSWER Loose packed
position of the SC joint
Achieved through maximum shoulder elevation, when the GH joint exceeds greater
than 110° of flexion or abduction. The clavicle must upwardly rotate to achieve this. -
ANSWER Closed packed position of the SC joint
Conditions of the SC joint - ANSWER Osteoarthritis, sprain, dislocation, all are not
that common, clavicular fracture is most likely
With ankylosis of a SC joint shoulder elevation is severely limited to approximately
19° - ANSWER Osteoarthritis
Can be very serious injury may require open reduction surgery - ANSWER Posterior
dislocation of SC joint
Most common dislocation, usually occurs due to direct trauma to the side of the
shoulder, such as an impact or a fall, typically benign - ANSWER Anterior dislocation
with superior medial displacement of SC joint
Acromioclavicular joint is what kind of joint? - ANSWER Planer joint with incongruent
surfaces
High degree of variability between individuals and within individuals - ANSWER
Articular disc of the AC joint
Ligaments of the AC joint - ANSWER Coracoclavicular ligament comprised of
coronoid and trapezoid ligaments, and AC ligament
Achieved by bringing the GH joint into 90° of abduction - ANSWER AC joint closed
packed position
, This position is debatable - ANSWER Loose packed position of the AC joint
Conditions of the AC joint - ANSWER Osteoarthritis, osteolysis, AC joint dislocation
or shoulder separation
Resorption of the subchondral bone of the distal clavicle, can be due to trauma or
repetitive stress - ANSWER Osteolysis
Common mechanism of injury is direct impact to the lateral aspect of shoulder or a
fall on outstretched hand, graded on damage to ligaments and displacement of
clavicle, six types of grades of separation, grades 4 to 6 are variations of grade 3 -
ANSWER AC joint dislocation or shoulder separation
One of the most mobile joints - ANSWER Glenohumeral
The glenohumeral joint is what type of joint - ANSWER Ball and socket joint
The head of the humerus articulates with what. To form the GH joint - ANSWER
Glenoid fossa
The GH joint at the glenoid fossa is supported by what - ANSWER Glenoid labum,
ligaments, joint capsule, rotator cuff
What ligaments are in the GH joint? - ANSWER The superior, middle, inferior, and
posterior GH ligaments
What are the rotator cuff muscles? (SITS) - ANSWER Supraspinatus, infraspinatus,
teres minor, subscapularis muscles
In the coronal plane line of the scapula with approximately 38-40° of abduction -
ANSWER Loose packed position of the GH joint
Full abduction and full external rotation - ANSWER Closed packed position of the
GH joint
Prevents inferior displacement of the humerus along with the supraspinatus, taught
with adduction and inferior and posterior translation - ANSWER Superior ligament at
the GH joint
Prevents anterior translation of the head of the humerus and external rotation,
becomes taught at 90° abduction and stabilizes internal rotation, acts as a sling for
the humeral head - ANSWER Inferior ligament at the GH joint
Prevents posterior translation of humeral head, important, in posterior capsule
tightness - ANSWER Posterior ligament at the GH joint
Conditions of the GH joint - ANSWER Sprain/strain, impingement syndrome, bursitis,
rotator cuff tear, SLAP tear, adhesive capsulitis, dislocation, fracture
The shoulder girdle is comprised of which four joints? - ANSWER Sternoclavicular
(S/C)
Acromioclavicular (A/C)
Glenohumeral (G/H)
Scapulothoracic Articulation (S/T)
Sternoclavicular joint is what kind of joint - ANSWER Complex saddle joint
Increases the congruity of the highly irregular joint surfaces - ANSWER
Sternoclavicular joint articular disc
Ligaments of the sternoclavicular joint - ANSWER SC ligament, interclavicular,
Costoclavicular
Achieved by placing the arm down at the side of the body - ANSWER Loose packed
position of the SC joint
Achieved through maximum shoulder elevation, when the GH joint exceeds greater
than 110° of flexion or abduction. The clavicle must upwardly rotate to achieve this. -
ANSWER Closed packed position of the SC joint
Conditions of the SC joint - ANSWER Osteoarthritis, sprain, dislocation, all are not
that common, clavicular fracture is most likely
With ankylosis of a SC joint shoulder elevation is severely limited to approximately
19° - ANSWER Osteoarthritis
Can be very serious injury may require open reduction surgery - ANSWER Posterior
dislocation of SC joint
Most common dislocation, usually occurs due to direct trauma to the side of the
shoulder, such as an impact or a fall, typically benign - ANSWER Anterior dislocation
with superior medial displacement of SC joint
Acromioclavicular joint is what kind of joint? - ANSWER Planer joint with incongruent
surfaces
High degree of variability between individuals and within individuals - ANSWER
Articular disc of the AC joint
Ligaments of the AC joint - ANSWER Coracoclavicular ligament comprised of
coronoid and trapezoid ligaments, and AC ligament
Achieved by bringing the GH joint into 90° of abduction - ANSWER AC joint closed
packed position
, This position is debatable - ANSWER Loose packed position of the AC joint
Conditions of the AC joint - ANSWER Osteoarthritis, osteolysis, AC joint dislocation
or shoulder separation
Resorption of the subchondral bone of the distal clavicle, can be due to trauma or
repetitive stress - ANSWER Osteolysis
Common mechanism of injury is direct impact to the lateral aspect of shoulder or a
fall on outstretched hand, graded on damage to ligaments and displacement of
clavicle, six types of grades of separation, grades 4 to 6 are variations of grade 3 -
ANSWER AC joint dislocation or shoulder separation
One of the most mobile joints - ANSWER Glenohumeral
The glenohumeral joint is what type of joint - ANSWER Ball and socket joint
The head of the humerus articulates with what. To form the GH joint - ANSWER
Glenoid fossa
The GH joint at the glenoid fossa is supported by what - ANSWER Glenoid labum,
ligaments, joint capsule, rotator cuff
What ligaments are in the GH joint? - ANSWER The superior, middle, inferior, and
posterior GH ligaments
What are the rotator cuff muscles? (SITS) - ANSWER Supraspinatus, infraspinatus,
teres minor, subscapularis muscles
In the coronal plane line of the scapula with approximately 38-40° of abduction -
ANSWER Loose packed position of the GH joint
Full abduction and full external rotation - ANSWER Closed packed position of the
GH joint
Prevents inferior displacement of the humerus along with the supraspinatus, taught
with adduction and inferior and posterior translation - ANSWER Superior ligament at
the GH joint
Prevents anterior translation of the head of the humerus and external rotation,
becomes taught at 90° abduction and stabilizes internal rotation, acts as a sling for
the humeral head - ANSWER Inferior ligament at the GH joint
Prevents posterior translation of humeral head, important, in posterior capsule
tightness - ANSWER Posterior ligament at the GH joint
Conditions of the GH joint - ANSWER Sprain/strain, impingement syndrome, bursitis,
rotator cuff tear, SLAP tear, adhesive capsulitis, dislocation, fracture
