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MSK Anatomy > Posterior Shoulder > Flashcards

Posterior Shoulder Flashcards

1
Q

What are the bones in the pectoral girdle?

A

Clavicle
Manubrium of sternum
Scapula

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2
Q

What joint in the posterior shoulder is commonly dislocated?

A

Acromioclavicular joint

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3
Q

Via which three bilateral joints does the upper limp articulate to the appendicular skeleton?

A

Glenohumeral
Acromioclavicular
Sternoclavicular

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4
Q

What 4 things is the glenohumeral joint susceptible to?

A

OA
RA
Dislocation
Adhesive capsulitis

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5
Q

What is the glenoid labrum?

A

A ring of fibrocartilage around the glenoid cavity

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6
Q

What is the function of the glenoid labrum?

A

It increases the size of the humeral head to increase stability of the glenohumeral joint

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7
Q

What can cause a labral tear?

A

Trauma

Repetitive overuse e.g. swimming

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8
Q

What is a SLAP tear?

A

Superior labral tear from anterior to posterior

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9
Q

What are the extrinsic shoulder muscles? (5)

A

Trapezius
Latissimus dorsi
Levator scapulae
Rhomboid - major and minor

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10
Q

What is the origin and insertion of trapezius?

A

Origin: Skull and spinous processes of C7- T12
Insertion: Occiput and spine of scapula

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11
Q

What is the innervation of trapezius?

A

Accessory Nerve CNXI

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12
Q

What is the action of trapezius?

A

Depress
Retract
Elevate
scapula

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13
Q

What is the origin and insertion of latissimus dorsi?

A

Broad origin: T6- T12, illiac crest, inferior 3 ribs

Instertion: Humerus

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14
Q

What is the innervation of latissimus dorsi?

A

Thoracodorsal nerve - C6, C7, C8

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15
Q

What is the action of latissimus dorsi?

A

Extends, adducts and medially rotates the upper limb

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16
Q

What is the origin and insertion of levator scapulae?

A

Origin: C1- C4
Insertion: scapula

17
Q

What is the innervation of levator scapulae?

A

Dorsal scapular nerve C5

18
Q

What is the action of levator scapulae?

A

Elevates scapula

19
Q

Which of the rhomboids sits more superiorly?

A

Rhomboid minor

20
Q

What is the origin and insertion of rhomboid minor?

A

Origin: C7 - T1
Insertion: Scapula

21
Q

What is the origin and insertion of rhomboid major?

A

Origin: T2 - T5
Insertion: Scapula

22
Q

What is the innervation of rhomboid major?

A

Dorsal scapular nerve C5

23
Q

What is the action of the rhomboid major?

A

Retracts and rotates scapula

24
Q

What is the innervation of rhomboid minor?

A

Dorsal scapular nerve C5

25
Q

What is the action of the rhomboid minor?

A

Retracts and rotates scapula

MSK Anatomy (21 decks)

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