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ANNNNNAAtomy > S, P, R > Flashcards

S, P, R Flashcards

1
Q

Why does the synovial membrane extend inferiorly near the long head of the biceps brachii?

A

lots of movement, needs to be protected/lubricated, maintains maximum range of motion

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2
Q

What does the long head of biceps brachii tendon run on?

A

bicipital groove

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3
Q

What are the muscles of the rotator cuff?

A

Supraspinatus m.
infraspinatus m.
teres minor m.
subscapularis m.

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4
Q

What is the action of the deltoid m.?

A

abducts humerus, flexes, extends and rotates humerus

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5
Q

What is the neurovasculature of deltoid m.?

A

axillary n.

posterior circumflex humeral vessels

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6
Q

What is the action of teres major m.?

A

medially rotates and extends humerus

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7
Q

What is the nuerovasculature of teres major m.?

A

lower (inferior) subscapular n.

subscapular vessels

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8
Q

What is the action of the supraspinatus m.?

A

abducts humerus (1st 15 degrees–initiates abduction), reaches maximum contribution at 110 degrees

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9
Q

What is the neurovasculature of supraspinatus m.?

A

suprascapular n.

suprascapular vessels
dorsal scapular vessels

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10
Q

What is the action of the infraspinatus m.?

A

laterally rotates humerus

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11
Q

What is the neurovasculature of infraspinatus m.?

A

suprascapular n.

subscapular vessels

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12
Q

What is the action of the teres minor m.?

A

lateral rotation of humerus

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13
Q

What is the nuerovasculature of teres minor m.?

A

axillary n.

suprascapular vessels
subscapular vessels

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14
Q

What is the action of the subscapularis m.?

A

medial rotation of humerus

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15
Q

What is the neurovasculatre of subscapularis m.?

A

upper and lower sub scapular n.

subscapular vessels

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16
Q

Should the subacromial bursa be continous with the glenohumeral joint capsule?

A

No

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17
Q

What are the borders of the quadrangular space?

A 
superior = teres minor m.
inferior = teres major m.
medial = long head of triceps brachia m.
lateral = surgical head of humerus
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18
Q

What is contained within the quadrangular space?

A

axillary n.

posterior circumflex humeral vessels

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19
Q

What are the borders of the triangular space?

A 
superior = teres minor m.
inferior = teres major m.
lateral = long head of triceps brachii m.
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20
Q

What does the triangular space contain?

A

circumflex scapular vessels

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21
Q

What are the borders of the triangular interval?

A 
superior = teres major m.
medial = long head of triceps brachii m.
lateral = lateral head of triceps brachii m.
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22
Q

What does the triangular interval contain?

A

radial n.

deep brachial a.

23
Q

What nerves and arteries supply the shoulder region?

A

suprascapular nerve and artery
dorsal scapular nerve and artery
accessory nerve and transverse cervical artery
upper and lower subscapular nerve and sub scapular artery

24
Q

What is the relationship between the suprascapular nerve, artery and the superior transverse scapular ligament?

A

suprascapular artery runs ABOVE ligament

suprascapular nerve runs UNDER ligament

25
Q

What do the suprascapular nerve and artery supply?

A

supraspinatus and infraspinantus mm.

26
Q

What is the origin of the suprascapular n.?

A

ventral rami C5 - C6

27
Q

What is the origin of the suprascapular a.?

A

thryocervical trunk

28
Q

Where do the dorsal scapular n. and deep transverse cervical a. run?

A

parallel to vertebral border of scapula

29
Q

What do the dorsal scapular n. and deep transverse cervical a. supply?

A

levator scapulae m.

rhomboid mm.

30
Q

What is the origin of dorsal scapular n.?

A

ventral ramus C5

31
Q

What is the origin of the accessory n.?

A

CN XI

32
Q

What is the origin of the transverse cervical a.?

A

thyrocervical trunk

33
Q

What do the accessory n. and transverse cervical a. supply?

A

trapezius m.

34
Q

What is the origin of the upper and lower sub scapular nn.?

A

posterior cord of brachial plexus

ventral rami C5-6

35
Q

What is the origin of the sub scapular a.?

A

axillary a.

36
Q

What does the subscapular a. branch into?

A

thoracodorsal a.

circumflex scapular a.

37
Q

What do the upper and lower subscapular nn. and subscapular a. supply?

A

subscapularis mm.

*lower nn. and subscapular a. supply teres major

38
Q

What provides collateral circulation to shoulder region?

A

thryocervical trunk and subscapular a.

39
Q

How is collateral circulation halted?

A

If anywhere distal to subscapular a. is ligated

40
Q

What is the action of the pec major?

A

adducts and medially rotate humerus

41
Q

What is the neurovasculature of pec major?

A

medial and lateral pectoral nn.

thoracoacromial vessels

42
Q

What is the action of pec minor?

A

protract scapula

43
Q

What is the neurovasculature of pec minor?

A

medial pectoral n. (NOT lateral)

thoracoacromial vessels

44
Q

What are the main arteries supplying the pectoral region?

A

lateral thoracic a.
internal thoracic a.
thoracoacromial a.

45
Q

Describe the lateral thoracic a.

A

branch of axillary a. (1st part)

runs with long thoracic n.

supplies lateral thorax, lateral pec, lateral breast

46
Q

Describe the internal thoracic a.

A

branch of subclavian a.

descends lateral to sternum

supplies anterior thorax, med pec region, med breast

47
Q

Describe the thoracoacromial a.

A

branch of axillary a.

sends off 4 branches (pectoral, clavicular, lacrimal, deltoid aa.)

48
Q

What are the four nerves responsible for pectoral region innervation?

A

cutaneous nerves
medial pectoral nerve
lateral pectoral nerve
long thoracic nerve

49
Q

Describe the cutaneous nerves.

A

general sensory (T1-T6)

lateral and anterior cutaneous branches of intercostal nn.

50
Q

Describe the medial pectoral nerve.

A

medial cord of brachial plexus

ventral rami C8-T1

pierces pectoralis minor

supplies pec major and minor

51
Q

What nerve pierces pec minor?

A

medial pectoral nerve

52
Q

Describe the lateral pectoral nerve.

A

lateral cord of brachial plexus

ventral rami C5-7

supplies pec major

53
Q

Describe the long thoracic nerve.

A

ventral rami C5-C7

supplies serratus anterior m.

54
Q

What nerve is often damaged during mastectomy?

A

long thoracic nerve

ANNNNNAAtomy (13 decks)

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