Muscles (Exam 1) Flashcards
(119 cards)
1
Q
Trapezius attachments
A
Superior nuchal line, external occipital protuberance, ligamentum
to
clavicle, acromion, crest of spine of scapula
2
Q
Trapezius innervation
A
Motor = CN XI (accessory nerve) Sensory = C3-4
3
Q
Levator scapulae innervation
A
Dorsal scapular nerve
sensory
4
Q
Trapezius action
A
Scapular elevation, depression, retraction, and upward rotation
5
Q
Levator scapulae attachments
A
C1-C4 transverse processes
to
superior angle & border of scapula
6
Q
Levator scapulae actions
A
scapular elevation and downward rotation
7
Q
Rhomboids attachments (Major & Minor)
A
Major: T2-T5 spinal processes, Minor: ligamentum nuchae, C7-T1
TO
medial border of scapula
8
Q
Rhomboids innervation
A
dorsal scapular nerve
9
Q
Rhomboids actions
A
scapular retraction, elevation, downward rotation
10
Q
Serratus anterior attachments
A
Ribs 8-10
to
costal surface of medial border of scapula
11
Q
serratus anterior innervation
A
long thoracic nerve
12
Q
serratus anterior actions
A
scapular protraction and upward rotation
13
Q
Latissimus dorsi attachments
A
Lower thoracic spinal processes, thoracolumbar fascia, iliac crest
to
intertubercular sulcus of humerus
14
Q
Latissimus dorsi innervation
A
thoracodorsal nerve
15
Q
latissimus dorsi actions
A
adduction, extension, and medial rotation of humerus
16
Q
pectoralis major attachments
A
clavicle, costal cartilage, sternum, aponeurosis of external oblique
to
lateral lip of intertuburcular sulcus of humerus
17
Q
pectoralis major innervation
A
medial and lateral pectoral nerves
18
Q
pectoralis major actions
A
adduction, flexion, medial rotation of humerus
19
Q
pectoralis minor attachments
A
ribs 3-5 outer surface
to
coracoid process
20
Q
pectoralis minor innervation
A
medial and lateral pectoral nerves
21
Q
pectoralis minor actions
A
anterior scapula tilt, assists with depression & forced inspiration
22
Q
subclavius attachments
A
1st rib
to
undersurface of clavicle
23
Q
subclavius innervation
A
subclavian nerve
24
Q
subclavius actions
A
depression & stabilizing clavicle
25
deltoid attachments
clavicle, acromion, spine of scapula
to
deltoid tuberosity of humerus
26
deltoid innervation
axillary nerve
27
deltoid actions
anterior portion: flexion and medial rotation
middle: abduction
posterior: extension and lateral rotation, horizontal extension
of humerus
28
Supraspinatus attachments
medial 2/3 of supraspinous fossa
to
superior facet of greater tubercle of humerus and shoulder joint capsule
29
supraspinatus innervation
suprascapular nerve
30
supraspinatus actions
initiates humeral abduction and lateral rotation
| stabilizes glenohumeral joint
31
infraspinatus attachments
medial 2/3 of infraspinous fossa
to
middle facet of greater tubercle of humerus and shoulder joint capsule
32
infraspinatus innervation
suprascapular nerve
33
infraspinatus actions
lateral rotation of humerus
| glenohumeral joint stabilization
34
teres minor attachments
upper 2/3 of dorsal surface of lateral border of scapula
to
inferior facet of the greater tubercle of humerus & joint capsule
35
teres minor innervation
axillary nerve
36
teres minor actions
lateral rotation of humerus
| glenohumeral stabilization
37
subscapularis attachments
subscapular fossa
to
lesser tubercle of humerus
38
subscapularis innervation
upper & lower subscapular nerves
39
subscapularis actions
medial rotation of humerus
| glenohumeral stabilization
40
teres major attachments
dorsal surface of inferior angle of scapula & lower 1/3 of lateral border
to
medial lip of intertubercular sulcus of humerus
41
teres major innervation
lower subscapular nerve
42
teres major actions
humeral adduction, medial rotation, extension
43
Internal (medial) rotators of the humerus
```
Pectoralis major
Deltoid (anterior head)
Teres major
Latissimus dorsi
Subscapularis
```
44
External (lateral) rotators of the humerus
Posterior head of the Deltoid
Infraspinatus
Supraspinatus
Teres minor
45
Upward rotators of the scapula
Trapezius
| Serratus anterior
46
Downward rotators of the scapula
Levator scapulae
| Rhomboids
47
Muscles that cause scapular retraction (adduction)
Rhomboids
| Trapezius
48
Muscles that cause scapular protraction (abduction)
Serratus anterior
Serratus posterior superior
Pectoralis minor
49
Muscles innervated by the dorsal scapular nerve
Rhomboids
| Levator scapulae
50
Muscles innervated by the axillary nerve
Deltoid
| Teres minor
51
Muscles innervated by the suprascapular nerve
Supraspinatus
| Infraspinatus
52
Muscles innervated by the lower subscapular nerve
teres major
| subscapularis
53
Anconeus attachments
lateral epicondyle of humerus
to
lateral surface of the olecranon process
54
Anconeus actions
elbow extension
55
Anconeus innervation
radial nerve
56
Biceps brachii attachments
short head: coracoid process
long head: supraglenoid tubercle
to
radial tuberosity and deep antebrachial fascia
57
Biceps brachii actions
should & elbow flexion
| forearm supination
58
biceps brachii innervation
musculocutaneous nerve
59
brachialis attachments
distal anterior shaft of humerus & lateral and medial intermuscular septa
to
coronoid process & ulnar tuberosity
60
brachialis actions
elbow flexion
61
brachialis innervation
musculocutaneous & small branch of radial n.
62
coracobrachialis attachments
coracoid process
to
proximal medial shaft of humerus
63
coracobrachialis actions
shoulder flexion and adduction
64
coracobrachialis innervation
musculocutaneous nerve
65
triceps brachii attachments
infraglenoid tubercle of the scapula (long head), proximal posterolateral shaft of humerus (lateral head), and distal posteromedial shaft of humerus (medial head)
to
olecranon process of ulna
66
triceps brachii actions
```
shoulder extension (long head)
elbow extension (long, medial, lateral heads)
```
67
triceps brachii innervation
radial nerve
68
brachioradialis attachments
lateral supracondylar ridge of humerus
to
distal radius lateral to styloid process
69
brachioradialis actions
elbow flexion
70
brachioradialis innervation
radial nerve
71
Elbow flexors
Biceps brachii, brachialis, brachioradialis
72
elbow extensors
anconeus, triceps brachii
73
Muscles innervated by the radial nerve
triceps brachii, anconeus (small branch to brachialis)
74
Muscles innervated by the musculocutaneous nerve
biceps brachii, coracobrachialis, brachialis
75
Abductor pollicis longus attachments
Proximal posterior radius, ulna, & interosseous membrane
To
Base of 1st metacarpal & trapezium
76
Abductor pollicis longus actions
Abducts & extends thumb (carpometacarpal joint)
| Abducts hand at wrist (RADIAL DEVIATION)
77
Brachioradialis attachments
Lateral supracondylar ridge of humerus
To
Distal radius later to styloid process
78
Brachioradialis action
Elbow flexion
79
Extensor carpi radialis brevis
Lateral epicondyle of humerus
To
Base of 3rd metacarpal
80
Extensor carpi radialis brevis actions
Extension & radial deviation
81
Extensor carpi ulnaris attachments
Lateral epicondyle of humerus
To
Base of 5th metacarpal
82
Extensor carpi ulnaris action
Extension and ulnar deviation
83
Extensor digitorum attachments
Lateral epicondyle of the humerus
To
Extensor expansions of digits 2-5
84
Extensor digitorum action
Phalangeal extension & wrist extension
85
Extensor digiti minimi attachments
Lateral epicondyle of humerus
To
Digital expansion of 5th digit
86
Extensor digiti minimi action
Extension of 5th digit
87
Extensor indicis attachments
Posterior surface of ulna & interosseous membrane
To
Digital expansion of 2nd digit
88
Extensor indicis action
Extension of 2nd digit
89
Extensor pollicis brevis attachments
Posterior radial surface & interosseous membrane
To
Base of 1st proximal phalanx
90
Extensor pollicis brevis actions
Thumb extension
| Extension & abduction of CMC joint
91
Extensor pollicis longus attachments
Middle 1/3 of posterior surface of ulna & interosseous membrane
To
Membrane of base of 1st distal phalanx
92
Extensor pollicis longus actions
Thumb extension
93
Flexor carpi radialis attachments
Medial epicondyle
To
Palmar aspect of base of 2nd metacarpal
94
Flexor carpi radialis
Radial deviation
| Wrist flexion
95
Flexor carpi ulnaris attachments
Medial epicondyle of humerus & proximal ulnar shaft
To
pisiform
96
Flexor carpi ulnaris actions
Ulnar deviation, wrist flexion
97
Flexor digitorum profundus attachments
Anterior proximal 2/3 of ulna
To
Base of distal phalanges of digits 2-5
98
Flexor digitorum profundus actions
Digits 2-5 flexion, wrist flexion
99
Flexor digitorum superficialis attachments
Medial epicondyle
To
Side of middle phalanges of digits 2-5
100
Flexor digitorum superficialis actions
Flexion of digits and wrist
101
Flexor pollicis longus attachments
Anterior surface of radius
To
Base of distal phalanx of thumb
102
Flexor pollicis longus action
Thumb flexion
103
Palmaris longus attachments
Medial epicondyle of humerus
To
Palmar aponeurosis
104
Palmaris longus actions
Wrist flexion, tenses palmar fascia
105
Pronation quadratus attachments
Anterior surface of distal ulna
To
Anterior surface of distal radius
106
Pronoator quadratus action
Forearm pronation
107
Pronation Teres attachments
Medial epicondyle & ulnar coronoid process
To
Lateral aspect of radius
108
Pronator Teres actions
Forearm flexion and pronation
109
Supinator attachments
Lateral epicondyle of humerus, radial collateral ligament, & supinator crest of ulna
To
Lateral surface of proximal radius
110
Supinator action
Supinate forearm
111
Dorsal Interosseous actions
Abduct digits
Flexion at metacarpalphalangeal joints
Extension at interphalangeal joints via extensor expansions
112
Dorsal interossei innervation
Deep branch of ulnar nerve
113
Palmar interossei muscles are located where
Digits 2, 4, 5
114
Palmar interossei actions
Digit Adduction
Flexion at metacarpophalanageal joints
Extension of index, ring and pinky finger at IPJ
115
Palmar interossei innervation
Deep branch of ulnar nerve
116
Lumbrical actions
Refinement muscles
Flex at MCP
Extend at IPJ
117
Lumbrical innervation
1 & 2 = median nerve
| 3-4 = ulnar nerve
118
Innervation of abductor pollicis brevis
Median nerve
119
Innervation of flexor pollicis brevis
Recurrent branch of median nerve
