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Tri 3 - Gross Anatomy II > E1A > Flashcards

E1A Flashcards

Axioappendicular Scapulohumeral Muscles

1
Q

posterior axioappendicular muscles

A

trapezius
latissimus dorsi
levator scapulae
rhomboids major/minor

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2
Q

anterior axioappendicular muscles

A

pectoralis major/minor
subclavius
serratus anterior

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3
Q

pectorals major origin

A

clavicular: medial half clavicle
sternocostal: sternum, upper 6 costal cartilages
abdominal: aponeurosis of EO muscle

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4
Q

pectoralis major insertion

A

intertubercular groove (lateral) of humerus (greater tubercle)

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5
Q

pectoralis major innervation

A

medial and lateral pectoral nerves

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6
Q

pectoralis major action

A

flexion, adduction, medial rotation of arm

assists in forced inspiration

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7
Q

pectoralis minor origin

A

ribs 3, 4, 5

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8
Q

pectoralis minor insertion

A

coracoid process

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9
Q

pectoralis minor innervation

A

medial pectoral nerve

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10
Q

pectoralis minor action

A

protraction, inferior rotation of scapula

assists in forced inspiration

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11
Q

subclavius origin

A

1st rib/costal cartilage

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12
Q

subclavius insertion

A

inferior surface of middle third of clavicle

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13
Q

subclavius innervation

A

nerve to subclavius

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14
Q

subclavius action

A

depresses clavicle

braces clavicle against sternum

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15
Q

serratus anterior origin

A

external surface of upper 8-9 ribs

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16
Q

serratus anterior insertion

A

anterior surface of medial border/inferior angle of scapula

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17
Q

serratus anterior innervation

A

long thoracic nerve

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18
Q

serratus anterior action

A

protracts scapula, holds against thoracic wall

rotates scapula superiorly (full abduction of arm)

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19
Q

serratus anterior paralysis

A

winged scapula

medial border and inferior angle protrude posteriorly

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20
Q

scapulohumeral (intrinsic) muscles

A 
deltoid
supraspinatus
infraspinatus
teres major/minor
subscapularis
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21
Q

deltoid origin

A

clavicular: lateral 1/3 of clavicle
acromial: acromion
spinal: spine of scapula

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22
Q

deltoid insertion

A

deltoid tuberosity (lateral surface of shaft)

23
Q

deltoid innervation

A

axillary nerve

24
Q

deltoid action

A 
abduction of arm
medial rotation (anterior fibers)
lateral rotation (posterior fibers)
25
Q

supraspinatus origin

A

supraspinatus fossa of scapula

26
Q

supraspinatus insertion

A

greater tubercle of humerus (upper facet)

27
Q

supraspinatus innervation

A

suprascapular nerve

28
Q

supraspinatus action

A

stabilize shoulder joint

initiates/assists deltoid in abduction

29
Q

infraspinatus origin

A

infraspinatus fossa of scapula

30
Q

infraspinatus insertion

A

greater tubercle of humerus (middle facet)

31
Q

infraspinatus innervation

A

suprascapular nerve

32
Q

infraspinatus action

A

stabilize shoulder joint

lateral rotation of arm

33
Q

teres minor origin

A

middle lateral border scapula

34
Q

teres minor insertion

A

greater tubercle of humerus (lower facet)

35
Q

teres minor innervation

A

axillary nerve

36
Q

teres minor action

A

stabilize shoulder joint

lateral rotation of arm

37
Q

teres major origin

A

lower lateral border, posterior inferior angle of scapula

38
Q

teres major insertion

A

intertubercular groove (medial lip) of humerus (lesser tubercle)

39
Q

teres major innervation

A

lower subscapular nerve

40
Q

teres major action

A

medial rotation, extension, adduction of arm

41
Q

subscapularis origin

A

subscapular fossa

42
Q

subscapularis insertion

A

lesser tubercle of humerus

43
Q

subscapularis action

A

stabilize shoulder joint

medial rotation of arm

44
Q

rotator cuff

A

supraspinatus (superiorly)
infraspinatus (posteriorly)
teres minor (posteriorly)
subscapularis (anteriorly)

45
Q

quadrangular space

A

communicates axilla with posterior aspect of shoulder

46
Q

quadrangular space boundaries

A

superior: teres minor
inferior: teres major
medial: LH biceps
lateral: humerus

47
Q

quadrangular space function

A

transmits axillary nerve and posterior circumflex humeral vessels

48
Q

triangular space

upper triangular

A

smaller space located medial to quadrangular space

49
Q

triangular space boundaries

A

superior: teres minor
inferior: teres major
lateral: LH biceps

50
Q

triangular space function

A

transmits circumflex scapular vessels

51
Q

triangular interval boundaries

lower triangular space

A

superior: teres major
medial: LH triceps
lateral: shaft of humerus

52
Q

triangular interval function

A

transmit radial nerve and profunda brachii vessels to reach posterior compartment of arm

53
Q

axillary nerve

A

originates from posterior cord of brachial plexus in axilla
ventral rami of C56
passes posteriorly through quadrangular space inferior to shoulder joint

54
Q

axillary nerve branches

A

muscular: deltoid, teres minor
articular: shoulder joint
cutaneous: upper lateral cutaneous nerve

Tri 3 - Gross Anatomy II (20 decks)

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