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Anatomy > Pectoral Girdle > Flashcards

Pectoral Girdle Flashcards

1
Q

A of deltoid m.

A

abducts humerus, flexes, extends, and rotates humerus

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2
Q

N of deltoid m.

A

axillary n. (C5,C6) and posterior circumflex humeral vessels

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3
Q

A of teres major m.

A

medially rotates and extends humerus

can also contribute to adduction of humerus

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4
Q

N of teres major

A

lower (inferior) subscapular n. (C5-C7) and subscapular vessels

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5
Q

A of supraspinatus m.

A

abducts the humerus (1st 15 degrees)

assists deltoid up to 110 degrees

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6
Q

N of supraspinatus m.

A

suprascapular n. (C5, C6) and vessels; and dorsal scapular vessels

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7
Q

A of infraspinatus

A

laterally rotates the humerus

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8
Q

N of infraspinatus

A

suprascapular n. (C5, C6) and vessels; and subscapular vessels

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9
Q

A of teres minor m.

A

lateral rotation of humerus

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10
Q

N of teres minor

A

axillary n. (C5, C6) and suprascapular and subscapular vessels

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11
Q

A of subscapularis m.

A

medial rotation of humerus

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12
Q

N of subscapularis

A

upper and lower subscapular nn. and subscapular vessels

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13
Q

membranous sac containing lubricating synovial fluid

A

subacromial (subdeltoid) bursa

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14
Q

subacromial bursa inferior to ____ and ____, but superior to _____

A

acromion; deltoid; supraspinatus m.

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15
Q

subacromial (subdeltoid) bursa can become continuous with joint capsule due to attrition of _____

A

supraspinatus tendon

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16
Q

spaces of the shoulder region

A

quadrangular space
triangular space
triangular interval

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17
Q

quadrangular space holds:

A

axillary n. and posterior circumflex humeral vessels

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18
Q

triangular space holds:

A

circumflex scapular vessels

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19
Q

triangular interval holds:

A

radial n. and profunda brachii a. (deep brachial a.)

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20
Q

borders of quadrangular space

A 
superior = teres minor m.
inferior = teres major m. 
medial = long head of triceps brachii m. 
lateral = surgical neck of the humerus
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21
Q

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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22
Q

borders of 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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23
Q

the radial n. and deep brachial a. run in the ____ or ____ groove of the humerus

A

radial; spinal

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24
Q

neurovascular supply of the shoulder region

A
  • suprascapular n. and a.
  • dorsal scapular n. and deep transverse cervical a.
  • accessory n. and superficial transverse cervical a.
  • upper and lower subscapular nn. and subscapular a.
25
Q

suprascapular n. originates in ____; runs under ____ through _____

A

ventral rami of C5-C6; superior transverse scapular ligament; suprascapular notch

26
Q

suprascapular a. originates in ____ and runs ____ superior transverse scapular ligament above suprascapular notch

A

thyrocervical trunk; over

27
Q

suprascapular n. and a. pass through ____ to infraspinatus fossa and supply ____ and _____ mm.

A

spinoglenoid notch; supraspinatus; infraspinatus

28
Q

dorsal scapular n. originates in ____

A

ventral ramus of C5

29
Q

dorsal scapular n. and deep transverse cervical a. run parallel to ____ of the scapula and supply ____ and ____ mm.

A

vertebral border; levator scapulae; rhomboid

30
Q

accessory n. originates in the ____, descends through neck and joins artery

A

brainstem (XI)

31
Q

superficial transverse cervical a. is a branch of the ____ and runs deep to the ____

A

thyrocervical trunk; trapezius m.

32
Q

accessory n. and superficial transverse cervical a. supply ____ m.

A

trapezius

33
Q

upper and lower subscapular nn. are branches off the posterior cord of the brachial plexus, ventral rami of ____

A

C5-C6

34
Q

subscapular a. is a branch off the ____; subscapular a. splits to ____ and _____

A

axillary a. ; thoracodorsal a. ; circumflex scapular a.

35
Q

upper and lower subscapular nn. and subscapular a. supply ____

A

subscapularis m.

36
Q

lower subscapular n. and subscapular a. supply ____

A

teres major m.

37
Q

ligated axillary a. should be between ____ and _____

A

thyrocervical trunk; subscapular a. (anywhere in axillary section 1 or 2)

38
Q

ligate anywhere distal to ____ and blood cannot flow to UL

A

subscapular a.

39
Q

A of pectoralis major

A

adducts and medially rotates humerus

40
Q

N of pectoralis major

A

medial and lateral pectoral nn. and thoracoacromial vessels

41
Q

A of pectoralis minor

A

protracts scapula

42
Q

N of pectoralis minor

A

medial pectoral n. and thoracoacromial vessels

43
Q

pectoral region arterial supply

A
  • lateral thoracic (mammary) a.
  • internal thoracic (mammary) a.
  • thoracoacromial a.
44
Q

lateral thoracic (mammary) a. is a branch off the 1st part of the ____ a. and runs posterior or deep to ____ m. and superficial to ____ m.

A

axillary; pectoralis minor; serratus anterior

45
Q

lateral thoracic (mammary) a. runs with ____ to supply lateral thorax, lateral pec region, and lateral breast

A

long thoracic n.

46
Q

internal thoracic (mammary) a. is a branch off the ____ inside the thorax

A

subclavian a.

47
Q

internal thoracic (mammary) a. descends across intercostal spaces lateral to the ____ to supply anterior thorax, medial pec region and medial breast

A

sternum

48
Q

thoracoacromial a. is a branch of the ____ under ____ m.

A

axillary a. ; pectoralis minor m.

49
Q

4 branches of thoracoacromial a.

A
  1. pectoral a.- supplies upper pec region
  2. clavicular a. - supplies clavicle region
  3. acromial a. - supplies upper shoulder region
  4. deltoid a. - supplies lower shoulder region
50
Q

pectoral region innervation

A

cutaneous nerves
medial pectoral nerve
lateral pectoral nerve
long thoracic nerve

51
Q

pec region cutaneous nerves are from ____ and are lateral and anterior cutaneous branches of ____ nn.

A

T1-T6 ; intercostal

52
Q

medial pectoral nerve is from the medial cord of the brachial plexus and derived from ventral rami ____

A

C8-T1

53
Q

medial pectoral n. pierces ____ to enter ____; it supplies ____ and part of ____

A

pectoralis minor m. ; pectoralis major m. ; pec minor; pec major

54
Q

_____ supplies the remainder of pectoralis major m.

A

lateral pectoral n.

55
Q

lateral pectoral n. derived from _____

A

ventral rami C5-C7

56
Q

lateral pectoral n. runs above ____ to enter ____

A

pectoralis minor; pectoralis major

57
Q

long thoracic n. derived from ____

A

ventral rami C5-C7

58
Q

long thoracic n. supplies _____ superficially (lies on the superficial surface)

A

serratus anterior

59
Q

damage to long thoracic n. can occur during ____ and results in ____ because the long thoracic nerve holds UL to thoracic wall

A

mastectomy; “winged scapula”

Anatomy (34 decks)

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