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1019 Regional > Shoulder Region > Flashcards

Shoulder Region Flashcards

1
Q

Classification of Sternoclavicular Joint

A

Synovial Saddle Joint (biaxial diarthrosis)

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2
Q

Movements involved in Sternoclavicular joint

A

Elevation/ Depression & Protraction/ Retraction

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3
Q

Ligaments that reinforce the sternoclavicular joint (Passive stabilisers)

A

Anterior sternoclavicular, Posterior sternoclavicular, interclavicular and costoclavicular ligament

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4
Q

What movement does the Anterior sternoclavicular ligament resist?

A

Retraction

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5
Q

What movement does the Posterior sternoclavicular ligament resist?

A

Protraction

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6
Q

What movement does the interclavicular ligament resist?

A

Depression of clavicle

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7
Q

What movement does the costoclavicular ligament resist?

A

All motions except depression of clavicle (due to the superior direction of the fibers)

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8
Q

What are the active stabilisers of the Sternoclavicular Joint

A

Sternocleidomastoid, Sternothyroid, Sternohyoid and Subclavius

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9
Q

What is the Classification of Acromioclavicular Joint

A

Synovial Plane Joint

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10
Q

Ligaments that reinforce the acromioclavicular joint (Passive stabilisers)

A

Acromioclavicular ligament Coracoclavicular Ligament that consists of Trapezoid ligament and conoid ligament

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11
Q

What movement does Acromioclavicular ligament resist?

A

Gliding of clavicle on acromion

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12
Q

What is the function of the Coracoclavicular ligament?

A

Suspending scapula from clavicle

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13
Q

Active stabilisers of the acromioclavicular joint

A

Deltoid, Upper trapezius

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14
Q

What structures provide stability in the Glenohumeral Joint

A

Rotator cuff muscles, Extracapsular ligaments, tendon of biceps brachii (long head)

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15
Q

What is the function of the glenoid labrum

A

Increase depth of glenoid fossa and increases articular contact area

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16
Q

Which tendon attaches to supraglenoid tubercle and superior aspect of the labrum?

A

Biceps brachii long head

17
Q

What is a possible consequence of the position of the tendon of biceps brachii long head?

A

Position of tendon resists superior migration of humeral head which is important in abduction

18
Q

Extracapsular ligaments in the Glenohumeral Joint

A

Coracohumeral ligament, Superior middle and inferior glenohumeral ligament, transverse humeral ligament

19
Q

What movement does the coracohumeral ligament resist?

A

Superior/Inferior translation during External Rotation of arm

20
Q

What movement does the superior glenohumeral ligament resist?

A

Adduction, Inferior and anterior-posterior translation of the humeral head

21
Q

What movement does the middle glenohumeral ligament resist?

A

Anterior translation of GH joint, external rotation

22
Q

What movement does the inferior glenohumeral ligament resist?

A

External Rotation by Anterior band

Internal rotation by Posterior band

Anterior translation of humeral head

23
Q

What is the function of the loose axillary pouch between the anterior and posterior bands?

A

The axillary pouch acts as a sling and supports the suspended humeral head, providing a cradling effect that resists inferior and anterior-posterior translations

24
Q

What ligaments provide main resistance to inferior translation of humerus in adduction?

A

Coracohumeral ligament and superior glenohumeral ligament

25
Q

What forms the coracoacromial Arch?

A

Coracoacromial ligament and acromion process of scapula

26
Q

What does the subacromial space contain?

A

Supraspinatus muscle, subacromial bursa, long head of biceps brachii, part of superior capsule

27
Q

Boundaries of the Quadrangular Space

A

Humerus, Teres Minor, Teres Major, Biceps brachii (Long head)

28
Q

What nerve may be impinged in the quadrangular space?

A

Axillary Nerve

29
Q

What are the possible causes of impingement?

A

Fracture of surgical neck of humerus and dislocation of glenohumeral joint

30
Q

What happens during arm elevation?

A

Clavicle- Upward rotation

Scapula- Upward rotation, external rotation, Posterior tilt
– Coracoid process moves away from conoid ligament, tightening the ligament, pulling conoid tubercle inferiorly, causing upward rotation of clavicle

Humerus- Abduction

1019 Regional (9 decks)

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