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MSK Final > Scapular and Deltoid Regions > Flashcards

Scapular and Deltoid Regions Flashcards

1
Q

trapezius muscle innervation

A

CN XI

Spinal accessory nerve

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2
Q

trapezius muscle blood supply

A

transverse cervical a (branch of thryocervical trunk)

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3
Q

Trapezius muscle action

A

Retracts the scapula
Superior fibers: rotate glenoid cavity (abduction of arm)
middle fibers: upward rotation and prevent sagging

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4
Q

latissimus dorsi innervation

A

thoracodorsal nerve (C6-C8)

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5
Q

latissimus dorsi vascularization

A

thoracodorsal artery (branch of subscapular a. from axillary a)

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6
Q

Latissimus dorsi action

A

adduction
medial rotation
extension
of arm

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7
Q

levator scapulae innervation

A

dorsal scapular n

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8
Q

levator scapulae blood supply

A

transverse cervical a (branch of thyrocervical trunk)

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9
Q

levator scapulae actions

A

elevates medial angle of scapula

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10
Q

rhomboideus major and minor innervation

A

dorsal scapular n

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11
Q

rhomboideus major and minor vascularization

A

transverse cervical a (branch of thyrocervical trunk)

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12
Q

rhomboideus major and minor actions

A

Elevates medial border and retracts scapula

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13
Q

Serratus anterior innervation

A

long thoracic n .

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14
Q

serratus anterior blood supply

A

lateral thoracic a

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15
Q

serratus anterior actions

A

protracts scapula
holds medial border firmly against thoracic wall
upward rotation (with the trapezius)

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16
Q

Deltoid innervation

A

axillary n (C5-C6)

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17
Q

deltoid vascularization

A

deltoid branch of thoracoacromial trunk

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18
Q

deltoid muscle actions

A

anterior (flex and medially rotate arm)
Middle fibers (abduct arm)
Posterior (extend and laterally rotate arm)

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19
Q

supraspinatus innervation

A

suprascapular n (C5-C6)

20
Q

supraspinatus vascularization

A

suprascapular artery (branch of thyrocervical trunk

21
Q

supraspinatus actions

A

abduction of arm

22
Q

infraspinatus vascularization

A 
suprascapular artery (branch . of thyrocervical trunk) 
circumflex scapular a
23
Q

infraspinatus innervation

A

suprascapular n

24
Q

infraspinatus actions

A

lateral rotation of arm

25
Q

teres major innervation

A

lower subscapular n

26
Q

teres major blood supply

A

thoracodorsal a (a branch of subscapular a)

27
Q

teres major actions

A

adduction
medial rotation
extension of arm

28
Q

teres minor innervation

A

axillary n

29
Q

teres minor blood supply

A

thoracodorsal a

30
Q

teres minor action

A

lateral rotation of arm (weak adductor)

31
Q

subscapularis innervation

A

upper and lower subscapular n

32
Q

subscapularis blood supply

A

thoracodorsal a (a branch of subscapular a)

33
Q

subscapularis actions

A

medial rotation of arm

34
Q

anterior fibers of the deltoid perform what action

A

flex and medially rotate arm

35
Q

middle fibers of the deltoid perform what action

A

abduct arm

36
Q

posterior fibers of the deltoid perform what action

A

extend and laterally rotate arm

37
Q

what are the boundaries of the quandrangular space

A

superior: lateral border of scapula and capsule of shoulder joint
Lateral: surgical neck of the humerus
Inferior: teres minor
Medial: long head of triceps brachii

38
Q

what are the contents of the quadrangular space

A

axillary n

posterior humeral circumflex artery and vein

39
Q

damage to the spinal accessory nerve would affect what muscle

A

trapezius affecting scapular rotation, abduction of arm

40
Q

damage to the thoracodorsal nerve would affect what muscle

A

latissimus dorsi affecting adduction, medial rotation, extension of arm

41
Q

damage to the long thoracic nerve would affect what muscle

A

serratus anterior affecting scapular protraction, upward rotation

42
Q

damage to the suprascapular nerve would affect what muscle

A

supraspinatus, infraspinatus, teres major, subscapularis
rotator cuff would be messed up
lateral/medial rotation of the arm would be affected

43
Q

damage to the axillary n would affect what muscle

A

teres minor affecting lateral rotation of the arm (and some adduction)

44
Q

rotator cuff muscles

A

Supraspinatus
infraspinatus
Teres minor
Subscapularis

45
Q

the supraspinatus tendon lies between

A

acromion process
__________
subacromial space 10-12mm

MSK Final (21 decks)

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