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Gross Anatomy > Test 2 Muscles of Shoulder and Arm > Flashcards

Test 2 Muscles of Shoulder and Arm Flashcards

0
Q

deltopectoral grove

A
  • between pectoralis major and deltoid

- cephalic vein runs through

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1
Q

anterior axioappendicular muscles
(thoracoappendicular or pectoral)
-move pectoral girdle

A
  • pectoralis major
  • pectoralis minor
  • sublavius
  • serratus anterior
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2
Q 
clavipectoral triangle
(deltopectoral)
A

formed by deltoid and pectoralis major diverging ,superiorly, along with the clavicle

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3
Q

pectoralis major origin

A

clavicular head-anterior surface of medial 1/2 of clavicle

sternocostal head-anterior surface of sternum, superior six costal cartalidges, apeneurosis of external oblique muscle

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4
Q

pectoralis major insertion

A

lateral lip of intertubercular sulcus(grove) of humerus

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5
Q

Pectoralis major innervation

A

Lateral and medial pectoral nerve clavicular head (C5, C6), sternocostal head ( C7, C8,T1)

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6
Q

pectoralis major action

A
  • adducts and medially rotates humerus
  • draws scapula anteriorly and inferiorly

-acting alone clavicular head flexes humerus and sternocostal head extends it from the flexed position

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7
Q

pectoralis minor insertion

A

Medial border and superior surface of coracoid process of scapula

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8
Q

pectoralis minor origin

A

3rd-5th costal ribs near their costal cartilages

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9
Q

pectoralis minor inervation

A

medial pectoral nerve (C8, T1)

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10
Q

pectoralis minor action

A

stabalizes scapula by drawing inferiorly nd anteriorly against thoracic walll

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11
Q

subclavius origin

A

junction of first rib and its costal cartilage

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12
Q

subclavius insertion

A

inferior surface of middle 1/3 of clavicle

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13
Q

subclavius innervation

A

subclavian nerve

C5, C6

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14
Q

subclavius action

A

anchors and depresses clavicle

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15
Q

serratus anterior origin

A

externl surface of lateral parts of 1st - 8th ribs

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16
Q

serratus anterior insertion

A

anterior surface of medial border of scapula

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17
Q

serratus anterior innervation

A

long thoracic nerve

C5, C6, C7

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18
Q

serratus anterior action

A

protracts scapula and holds against thoracic wall; rotates scapula

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19
Q

superficial posterior axioappendicular

extrinsic shoulder

A

trapezius

latissimus dorsi

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20
Q

deep posterior axioappendicular

extrinsic shoulder

A

levator scapula

rhomboids

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21
Q

scapulohumoral (intrinsic shoulder)

A
  • deltoid
  • teres major
  • 4 rotator cuff muscles; supraspinatus, infraspinatus, teres minor, subscapularis
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22
Q

deltoid proximal attachment ,origin

A
  • lateral 1/3 of clavicle

- acromion and spine of scapula

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23
Q

deltoid distal attachment, insertion

A

deltoid tuberosity of humerus

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24
deltoid innervation
axillary neve | C5,C6
25
deltoid action
- clavicular (anterior) flexes and medialy rotates - acromial (middle) abducts arm - spinal (posterior) part extends and laterally rotates arm
26
supraspinatus proximal attachment , origin
supraspinous fossa of scapula
27
supraspinatous distal attachment , insertion
superior facet of greater tubercle of humerus
28
supraspinatus innervation
suprascapular nerve | C4, C5, C6
29
supraspinatus action
- initiates and assists deltoid in abduction of arm | - acts with rotator cuff muscles
30
infraspinatus proximal attachment, origin
infraspinous fossa of scapula
31
infraspinatus distal attatchment, insertion
middle facet of greater tubercle of humerus
32
infraspinatus innervation
suprascapular nerve | C5, C6
33
infraspinatus action
- laterally rotate arm | - help hold humoral head in glenoid cavity of scapula
34
teres minor proximal attachment, origin
Middle part of lateral border of scapula
35
Teres minor Distal attachment, insertion
Inferior facet of greater tubercle of humerus
36
Teres minor innervation
axillary nerve | C5,C6
37
teres minor action
- laterally rotate arm | - help hold humoral head in glenoid cavity of scapula
38
teres major proximal attachment , origin
Posterior surface of interior angle of scapula
39
Teres major distal attachment insertion
Medial lip intertubercular groove of humerus
40
teres major innervation
lower subscapular nerve | C5, C6
41
subscapularis proximal attachment , origin
subscapular fossa (most of anterior surface of scapula)
42
subscapularis distal attachment, insertion
Lesser tubercle of humerus
43
subscapularis innervation
Upper and lower subscapular nerves | C5 C6 C7
44
subscapularis action
- medially rotates and adducts arm | - helps hold humeral head in glenoid cavity
45
biceps brachii proximal attatchment, origin
short head:tip of corocoid process of scapula long head: supraglenoid tubercle of scapula
46
biceps brachii distal attachment, insertion
- tuberosity of radius | - fascia of forearm via bicipital aponeurous
47
biceps brachii innervation
musculocutaneous nerve | C5 C6
48
biceps brachii action
- Supinates forearm and, when it is supinated, flexes forearm - flexes arm - short head helps resist dislocation of shoulder
49
brachialis proximal attachment ,origin
distal half of anterior surface of humerus
50
brachialis distal attachment , insertion
coronoid process and tuberosity of ulna
51
brachialis innervation
musculocutaneous nerve | C5 C6
52
brachialis action
flexes forearm in all positions
53
coracobrachialis proximal attachment, origin
tip of coracoid process of scapula
54
coracobrachialis distal attachment , insertion
middle 1/3 of medial surface of humerus
55
coracobrachialis innervation
musculocutaneous nerve | C6 C7 C8
56
coracobrachialis action
- helps flex and adduct arm | - resists dislocation of shoulder
57
triceps brachii proximal attachment origin
long head: infraglenoid tubercle of scapula lateral head:posterior surface of humerus, superior to radial groove medial head:posterior of surface of humerus, inferior to radial groove
58
triceps brachi distal attachment , insertion
proximal end of olecranon of ulna and fascia of forearm
59
triceps brachii innervation
radial nerve | C6 C7 C8
60
anconeus proximal attachment origin
lateral epicondyle of humerus
61
anconeus distal attachment insertion
lateral surface of olecrnon and superior part of posterior surface of ulna
62
anconeus innervation
radial nerve | C7 C8 T1
63
anconeus action
- Assist triceps in extending forearm - stabilizes elbow joint - abducts ulna during pronation
64
Posterior axioappendicular muscles
- Trapezius and Latissimus Dorsi(superifical) | - Levator scapula and rhomboid major and minor (Deep)
65
Trapezius origin
Middle superior nuchal line, EOP, nuchal ligament, C7-T12 spinous processes
66
Trapezius insertion
Lateral 1/3 of clavicle, acromion, spine of scapula
67
Trapezius Innervation
Spinal Accessory Nerve CN 11(C3, C4)
68
Trapezius Action
Descending fibers: elevate scapula Ascending fibers:depress scapula Middle fibers: retract scapula Ascending and descending fibers: rotate glenoid cavity superiorly
69
Latissimus Dorsi Origin
Illiac crest, thoracolumbar fascia, inferior 3-4 ribs, inferior 6 spinous processes of verterbrae
70
Latissimus Dorsi Insertion
Floor of intertubercular sulcus of humerus
71
Latissimus Dorsi Innervation
Thoracodorsal Nerve | C 6,7,8 keeps the lats great!
72
Latissimus Dorsi Action
medially rotate, adduct and extend humerus | also helps bring body close to arms in upward climbing
73
Levator Scapula Origin
Posterior tubercles of transverse process of C1-C4
74
Levator Scapula Insertion
medial border of scapula superior to the spine of scapula
75
Levator Scapula Innervation
Dorsalscapular nerve | C3, C4, C5
76
Levator Scapula Action
Inferiorly tilt glenoid cavity by rotating scapula | elevates scapula
77
Rhomboid Minor Origin
Nuchal ligament | Spinous process of C7-T1
78
Rhomboid minor insertion
Triangular area of medial end of scapular spine
79
Rhomboid minor Innervation
Dorsalscapular nerve | C4, C5
80
Rhomboid Minor Action
Retract scapula Fix scapula to thoracic wall Rotate scapula to depress glenoid cavity
81
Rhomboid Major Origin
Spinous process of T2-T5
82
Rhomboid Major Insertion
medial border of scapula from level of spine to inferior angle
83
Rhomboid major innervation
Dorsalscapular nerve | C4, C5
84
Rhomboid major action
Retract scapula Fix scapula to thoracic wall Rotate scapula to depress the glenoid cavity
85
Muscles of the rotator cuff
SITS | Supraspinatus, Infrspinatus, Teres Minor, Subscapularis

Gross Anatomy (20 decks)

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