Shoulder Flashcards
(99 cards)
1
Q
what is the part of the scapula that articulates with the humerus?
A
glenoid cavity
2
Q
what does the glenoid cavity articulate with?
A
the head of the humerus
3
Q
the anterior part of the pectoral girdle
A
clavicle
4
Q
branch of the brachiocephalic trunk, which arises from the aortic arch
A
right subclavian artery
5
Q
artery that arises directly from the aortic arch
A
left subclavian artery
6
Q
origin of supraspinatus
A
supraspinous fossa of the scapula
7
Q
insertion of supraspinatus
A
superior facet of the greater tubercle of the humerus
8
Q
innervation of supraspinatus
A
suprascapular n. (C4-C6)
9
Q
action of supraspinatus
A
initiation of abduction
10
Q
origin of infraspinatus
A
infraspinous process of scapula
11
Q
insertion of infraspinatus
A
middle facet of the greater tubercle of humerus
12
Q
innervation of infraspinatus
A
suprascapular n. (C4-C6)
13
Q
origin of the teres minor
A
lateral border of the scapula
14
Q
insertion of teres minor
A
inferior facet of the greater tubercle of the humerus
15
Q
innervation of teres minor
A
axilllary n. (C5,C6)
16
Q
action of teres minor
A
lateral (external) rotation, weak adduction
17
Q
origin of subscapularis
A
subscapular fossa of the scapula
18
Q
insertion of subscapularis
A
lesser tubercle of the humerus
19
Q
innervation of subscapularis
A
superior subscapular n. (C5,C6)
20
Q
action of subscapularis
A
medial (internal) rotation
21
Q
origin of clavicular part of deltoid
A
lateral 1/3 of clavicle
22
Q
origin of acromial part of deltoid
A
acromion
23
Q
origin of the spinal part of deltoid
A
spine of the scapula
24
Q
insertion of deltoid
A
deltoid tuberosity of the humerus
25
innervation of deltoid
axillary n. (C5,C6)
26
action of deltoid
clavicular: flexion, internal rotation, adduction
acromial: abduction
spinal: extension, external rotation, adduction
27
origin of teres major
inferior angle of the scapula
28
insertion of teres major
crest of lesser tubercle of the humerus (anterior angle)
29
innervation of teres major
lower subscapular n. (C5-C7)
30
action of teres major
internal rotation, adduction, extension
31
origin of clavicular part of pectoralis major
medial half of clavicle
32
origin of sternocostal part of pectoralis major
sternum and costal cartilages 1-6
33
origin of abdominal part of pectoralis major
rectus sheath (anterior layer)
34
insertion of pectoralis major
crest of greater tubercle of the humerus
35
innervation of pectoralis major
medial and lateral pectoral nn. (C5-T1)
36
action of pectoralis major
entire muscle: adduction, internal rotation
clavicular and sternocostal parts: flexion, assist in respiration when shoulder is fixed
37
borders of the quadrangular space
teres minor, teres major, long head of triceps brachii, humerus
38
what nerve passes through quadrangular space? what does it innervate?
axillary n.; teres minor and deltoid
39
what artery comes out of quadrangular space?
posterior circumflex humeral a.
40
borders of triangular space
teres minor and teres major
41
what comes out of triangular space?
circumflex scapular a.
42
borders of triceps hiatus
long head of triceps, humerus, teres major
43
what comes out of triceps hiatus?
deep brachial a. and radial n.
44
What is the origin of levator scapulae?
Transverse process of C1-C4
45
innervation of levator scapulae
dorsal scapular nerve (C4-C5)
46
action of levator scapulae
elevates the scapula medially while moving inferior angle medially, inclines neck ipsilaterally
47
What is the insertion of levator scapulae?
superior part of the medial border of the scapula
48
origin of trapezius (descending)
external occipital protuberance, spinous processes of C1-C7
49
origin of trapezius (transverse)
aponeurosis at T1-T4 spinous processes
50
origin of trapezius (ascending)
spinous process T5-T12
51
insertion of trapezius (descending)
clavicle (lateral 1/3)
52
insertion of trapezius (transverse)
acromion
53
insertion of trapezius (ascending)
scapular spine
54
innervation of trapezius
Accessory n., C3-C4 of cervical plexus
55
action of trapezius
descending - draws scap up, rotates glenoid cavity superiorly, tilts head same side, rotates it opposite side
transverse - draws scap medially
ascending - draws scap medially downward
56
origin of rhomboid minor
spinous process of C7-T1
57
origin of rhomboid major
spinous process T2-T5
58
insertion of rhomboids
medial border of the scapula above (minor) and below (major) the scapular spine
59
innervation of rhomboids
dorsal scapular n. (C4-C5)
60
actions of rhomboids
minor - draws scap medially upward while moving inferior angle medially
major - steadies scapula; draws scap medially upward
61
origin of latissimus dorsi (vertebral)
spinous process of T7-T12; thoracolumbar fascia
62
origin of latissimus dorsi (scapular)
scapula (inferior angle)
63
origin of latissimus dorsi (costal)
9th to 12th ribs
64
origin of latissimus dorsi (iliac)
iliac crest (posterior 1/3)
65
insertion of latissimus dorsi
floor of the intertubercular sulcus of the humerus
66
innervation of latissimus dorsi
thoracodorsal n. (C6-C8) "6 to 8, lats are great"
67
action of latissimus dorsi
handcuff: internal rotation, adduction, extension, respiration (cough muscle)
68
contents of triangular space
circumflex scapular a.
69
contents of quadrangular space
axillary n. and posterior circumflex humeral a.
70
contents of triceps hiatus
deep a. of the arm and radial n.
71
origin of pectoralis minor
3rd to 5th ribs
72
insertion of pectoralis minor
coracoid process of the scapula
73
innervation of pectoralis minor
medial pectoral n. (C8,T1)
74
action of pectoralis minor
anterior tilt of scapula, rotates glenoid cavity inferiorly, assist in respiration
75
origin of serratus anterior
1st to 9th ribs
76
insertion of serratus anterior
medial border of the scapula
77
innervation of serratus anterior
long thoracic n. (C5-C7)
78
action of serratus anterior (whole muscle)
draws scapula laterally forward (protraction), elevates ribs when shoulder is fixed
79
origin of subclavius
1st rib
80
insertion of subclavius
inferior surface of the clavicle
81
innervation of subclavius
n. to subclavius (C5,C6)
82
action of subclavius
steadies the clavicle in the sternoclavicular joint
83
origin of sternocleidomastoid (sternal head)
manubrium of the sternum
84
origin of sternocleidomastoid (clavicular head)
medial 1/3 of the clavicle
85
insertion of sternocleidomastoid
mastoid process and superior nuchal line
86
innervation of sternocleidomastoid
Accessory N. (CN XI)
87
action of sternocleidomastoid
uni: tilts head to the same side and rotates head to the opposite side
bi: extends the head and aid in breathing when the head is fixed
88
origin of anterior scalene
C3-C6 transverse process
89
origin of middle scalene
C1-C2 transverse process, C3-C7 posterior tubercle of the transverse processes
90
origin of posterior scalene
C5-C7 posterior tubercles of transverse processes
91
insertion of anterior scalene
scalene tubercle of the 1st rib
92
insertion of middle scalene
1st rib, behind the groove for the subclavian artery
93
insertion of posterior scalene
outer surface of 2nd rib
94
innervation of scalene
Direct branches from cervical and brachial plexuses (C3 to C8)
95
action of scalene
With the ribs mobile,
elevates the upper ribs during forced respiration.
With the ribs fixed,
uni: bend the cervical spine ipsilaterally
bi: flex the neck.
96
branches of axillary a.
superior thoracic, thoracoacromial, lateral thoracic, subscapular, anterior and posterior circumflex humeral
"HoTeL SPA"
97
what kind of joint is glenohumeral?
ball and socket synovial
98
what kind of joint is acromioclavicular?
plane synovial joint
99
what kind of joint is the sternoclavicular?
saddle synovial
