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MGA > Scapular Region and Shoulder Joint > Flashcards

Scapular Region and Shoulder Joint Flashcards

1
Q

Origin of deltoid

A

spine and acromion of scapula, lateral third of clavicle

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2
Q

what are the true rotator cuff muscles?

A

supraspinatus, infraspinatus, subscapularis, teres minor

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3
Q

insertion of deltoid

A

deltoid tuberosity of humerus

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4
Q

action of anterior, middle and posterior deltoid

A

anterior: flexion, medial rotation middle: abduction from 15-90 degrees posterior: extension and lateral rotation

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5
Q

innervation of deltoid

A

axillary nerve (C5-6)

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6
Q

origin of teres major

A

inferior angle of scapula

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7
Q

insertion of teres major

A

medial lip of the intertubercular sulcus of humerus

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8
Q

action of teres major

A

adduction, medial rotation of humerus

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9
Q

innervation of teres major

A

lower subscapular nerve (c5-C6)

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10
Q

origin of subscapularis

A

subscapular fossa

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11
Q

insertion of subscapularis

A

lesser tubercle of humerus **is the only muscle attached to this)

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12
Q

action of subscapularis

A

medial rotation of humerus

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13
Q

innervation of subscapularis

A

upper and lower subscapularis nerves (c5, C6, c7)

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14
Q

what is another name for the middle subscapular nerve?

A

thoracodorsal nerve

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15
Q

origin of teres minor?

A

lateral border of scapula

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16
Q

insertion of teres minor

A

inferior facet of greater tubercle

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17
Q

action of teres minor

A

lateral rotation, adduction, extension of humerus

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18
Q

innervation of teres minor

A

axillary nerve (C5, c6)

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19
Q

origin of infraspinatus

A

infraspinous fossa of scapula

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20
Q

insertion of infraspinatus

A

middle facet of greater tubercle

21
Q

action of infraspinatus

A

lateral rotation of humerus

22
Q

innervation of infraspinatus

A

suprascapular nerve (C5, c6)

23
Q

origin of supraspinatus

A

supraspinous fossa of scapula

24
Q

insertion of supraspinatus

A

upper facet of greater tubercle

25
Q

action of supraspinatus

A

abduction of humerus from 0-15degrees

26
Q

innervation of supraspinatus

A

suprascapular nerve (c4, C5, c6)

27
Q

what are the positions of the suprascapular artery and nerve relative to the superior transverse scapular ligament?

A

suprascapular artery goes above the ligament, suprascapular nerve goes below the ligament

28
Q

type of joints between sternoclavicular, acromioclavicular and glenohumeral joints?

A

synovial

29
Q

what kind of joint is the scapulothoracic joint?

A

physiologic joint (non synovial joint)

30
Q
A
31
Q
A
32
Q

what ligaments are associated with the acromioclavicular joint?

A

acromioclavicular liagment, coracoacromial ligament, coracoclavicular ligament consisting of the trapezoid ligament and the conoid ligament

33
Q

what joint is commonly associated with a “shoulder separation”?

A

acromioclavicular joint

34
Q

what is the joint that usually is fractured if there is a “clavicular fracture”

A

the sternoclavicular, because there is no where else for the stress to go

35
Q

what comprises the glenohumeral joint?

A

the head of the humerus and the glenoid cavity of the scapula

36
Q
A
37
Q
A
38
Q
A
39
Q
A
40
Q
A
41
Q
A
42
Q

what is the most common bursitis in the shoulder?

A

subacromial bursa gets impinged between acromion and supraspinatus tendon

dx: US or MRI
tx: corticosteroid injections

43
Q

what damage can the dislocation of the glenohumeral joint cause?

A

damage to the glenoid labrum, ligaments supporting the GH joint, nerves crossing the GH joint (axillary, radial), tendons crossing the GH joint (supraspinatus)

*most likely will damage the supraspinatus*

44
Q
A
45
Q

what is the difference between a shoulder dislocation and shoulder separation?

A

a dislocation is the disarticulation of the glenohumeral joint

a separation is when the acromioclavicular joint is disarticulated

46
Q

what muscle abducts the arm from 0-15degrees?

A

supraspinatus

47
Q

what muscle abducts the arm from 15-90 degrees?

A

deltoid

48
Q

what muscle abducts the arm more than 90 degrees?

A

serratus anterior, via superior rotation of the glenous fossa

MGA (27 decks)

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