Muscles Flashcards
1
Q
trapezius- descending
insertion
A
lateral 1/3 of clavicle
2
Q
trapezius- descending
innervation
A
accessory n. CN XI
C3-C4 of cervical plexus
3
Q
trapezius- descending
action
A
elevates scapula
4
Q
trapezius- transverse
origin
A
aponeurosis at T1-T4 spinous processes
5
Q
trapezius- transverse
insertion
A
acromion
6
Q
trapezius- transverse
innervation
A
accessory n. C XI
C3-C4 pf cervical plexus
7
Q
trapezius- transverse
action
A
retracts scapula
8
Q
trapezius- ascending
origin
A
spinous processes of T5-T12
9
Q
trapezius- ascending
insertion
A
scapular spine
10
Q
trapezius- ascending
innervation
A
accessory n. CN XI
C3-C4 of cervical plexus
11
Q
trapezius- ascending
action
A
depresses scapula
12
Q
rhomboid minor
origin
A
spinous processes of C6, C7
13
Q
rhomboid minor
insertion
A
medial border of scapula above scapular spine
14
Q
rhomboid minor
innervation
A
dorsal scapular nerve
C4-C5
15
Q
rhomboid minor
action
A
steadies scapula
elevates scapula
16
Q
rhomboid major
origin
A
spinous processes of T1-T4 vertebrae
17
Q
rhomboid major
insertion
A
medial border of scapula below scapular spine
18
Q
rhomboid major
innervation
A
dorsal scapular nerve
C4-C5
19
Q
rhomboid major
action
A
steadies scapula
elevates scapula
20
Q
levator scapulae
origin
A
transverse processes of C1-C4 vertebrae
21
Q
levator scapulae
insertion
A
superior angle of scapula
22
Q
levator scapulae
innervation
A
dorsal scapular nerve
C4-C5
23
Q
levator scapulae
action
A
draws scapula medially upward while moving inferior angle medially,
ipsilateral flexion
24
Q
supraspinatus
origin
A
supraspinous fossa
25
supraspinatus
| insertion
superior facet of greater tubercle of humerus
26
supraspinatus
| innervation
suprascapular nerve
| C4-C6
27
supraspinatus
| action
initiates abduction to first 15 degrees
28
infraspinatus
| origin
infraspinous fossa
29
infraspinatus
| insertion
middle facet of greater tubercle of humerus
30
infraspinatus
| innervation
suprascapular nerve
| C4-C6
31
infraspinatus
| action
external rotation
32
teres minor
| origin
lateral border of scapula
33
teres minor
| insertion
inferior facet of greater tubercle of humerus
34
teres minor
| innervation
axillary nerve
| C5, C6
35
teres minor
| action
external rotation
| weak adduction
36
subscapularis
| origin
subscapular fossa
37
subscapularis
| insertion
lesser tubercle of humerus
38
subscapularis
| innervation
subscapular nerve
| C5, C6
39
subscapularis
| action
internal rotation
40
Trapezius- descending
| Origin
Occipital bone
| Spinous process of C1-C7
41
teres major
| origin
inferior angle of scapula
42
teres major
| insertion
crest of lesser tubercle of humerus
43
teres major
| innervation
lower subscapular nerve
| C5-C7
44
teres major
| action
internal rotation
adduction
extension
45
deltoid- anterior/clavicular
| origin
lateral 1/3 of clavicle
46
deltoid- anterior/clavicular
| insertion
deltoid tuberosity of humerus
47
deltoid- anterior/clavicular
| innervation
axillary nerve
| C5, C6
48
deltoid- anterior/clavicular
| action
flexion!!
internal rotation
adduction
49
deltoid- middle/acromial
| origin
lateral 1/3 of clavicle
50
deltoid- middle/acromial
| insertion
deltoid tuberosity of humerus
51
deltoid- middle/acromial
| innervation
axillary nerve
| C5, C6
52
deltoid- middle/acromial
| action
abduction
53
deltoid- posterior/scapular
| origin
scapular spine
54
deltoid- posterior/scapular
| insertion
deltoid tuberosity of humerus
55
deltoid- posterior/scapular
| innervation
axillary nerve
| C5, C6
56
deltoid- posterior/scapular
| action
extension!!
external rotaiton
adduction
57
latissimus dorsi
| origin
spinous processes T7-T12, thoracolumbar fascia
inferior angle of scapula
9th - 12th ribs
posterior 1/3 of iliac crest
58
latissimus dorsi
| insertion
floor of intertubercular sulcus of humerus
59
latissimus dorsi
| innervation
thoracodorsal nerve
| C6-C8
60
latissimus dorsi
| action
internal rotation,
adduction,
extension
61
pectoralis major
| origin
medial 1/2 of clavicle
sternum and costal cartilages 1-6
anterior layer of rectus sheath
62
pectoralis major
| insertion
crest of greater tubercle of humerus
63
pectoralis major
| innervation
medial and lateral pectoral nerves
| C5-T1
64
pectoralis major
| action
clavicular and sternocostal: flexion
| entire muscle: adduction, internal rotation
65
pectoralis minor
| origin
3rd to 5th ribs
66
pectoralis minor
| insertion
coracoid process
67
pectoralis minor
| innervation
medial pectoral nerve
| C8, T1
68
pectoralis minor
| action
protraction
anterior tilt
depresses shoulder when elevated
69
serratus anterior
| origin
1st to 9th ribs
70
serratus anterior
| insertion
medial border of scapula
71
serratus anterior
| innervation
long thoracic nerve
| C5-C7
72
serratus anterior
| action
Superior part: lowers the raised arm
Inferior part: rotates scapula laterally
Entire muscle: draws scapula laterally forward
elevates ribs when shoulder is fixed
73
coracobrachialis
| origin
coracoid process of scapula
74
coracobrachialis
| insertion
in line with crest of lesser tubercle of humerus
75
coracobrachialis
| innervation
musculocutaneous nerve
| C5-C7
76
coracobrachialis
| action
flexion
adduction
internal rotation
77
subclavius
| origin
1st rib
78
subclavius
| insertion
inferior surface of clavicle
79
subclavius
| innervation
Nerve to subclavius
| C5, C6
80
subclavius
| action
steadies the clavicle in sternoclavicular joint
81
anterior scalene
| origin
C3-C6 anterior tubercle of transverse processes
82
anterior scalene
| insertion
1st rib scalene tubercle
83
anterior scalene
| innervation
direct branches from cervical and brachial plexuses
| C3-C8
84
anterior scalene
| action
Mobile ribs: elevates upper ribs during forced inspiration
Fixed ribs:
Unilateral- bends cervical spine to same side
Bilateral- flexes neck
85
middle scalene
| origin
C3-C7 posterior tubercles of transverse processes
86
middle scalene
| insertion
1st rib posterior to groover for subclavian artery
87
middle scalene
| innervation
direct branches from cervical and brachial plexuses
| C3-C8
88
middle scalene
| action
Mobile ribs: elevates upper ribs during forced inspiration
Fixed ribs:
Unilateral- bends cervical spine to same side
Bilateral- flexes neck
89
posterior scalene
| origin
C5-C7 posterior tubercles of transverse processes
90
posterior scalene
| insertion
2nd rib outer surface
91
posterior scalene
| innervation
direct branches from cervical and brachial plexuses
| C3-C8
92
posterior scalene
| action
Mobile ribs: elevates upper ribs during forced inspiration
Fixed ribs:
Unilateral- bends cervical spine to same side
Bilateral- flexes neck
93
inferior belly of omohyoid
| origin
superior border of scapula
94
inferior belly of omohyoid
| insertion
body of hyoid bone
95
inferior belly of omohyoid
| innervation
ansa cervicalis of cervical plexus C1-C3
96
inferior belly of omohyoid
| action
depresses hyoid
| draws larynx and hyoid down for phonation and terminal phases during swallowing
97
biceps brachii- long head
| origin
supraglenoid tubercle of scapula
98
biceps brachii- long head
| insertion
radial tuberosity
99
biceps brachii- long head
| innervation
musculocutaneous nerve
| C5-C6
100
biceps brachii- long head
| action
Elbow joint: flexion, supination
| Shoulder joint: flexion, abduction and internal rotation of humerus, stabilizes humeral head during deltoid contraction
101
biceps brachii- short head
| origin
coracoid process of scapula
102
biceps brachii- short head
| insertion
radial tuberosity
103
biceps brachii- short head
| innervation
musculocutaneous nerve
| C5-C6
104
biceps brachii- short head
| action
Elbow joint: flexion, supination
| Shoulder joint: flexion, abduction and internal rotation of humerus, stabilizes humeral head during deltoid contraction
105
brachialis
| origin
distal 1/2 of anterior surface of humerus
106
brachialis
| insertion
ulnar tuberosity
107
brachialis
| innervation
musculocutaneous nerve
C5-C6
radial nerve
C7
108
brachialis
| action
flexion at elbow joint
109
triceps brachii- long head
| origin
infraglenoid tubercle of scapula
110
triceps brachii- long head
| insertion
olecranon of ulna
111
triceps brachii- long head
| innervation
radial nerve C6-C8
112
triceps brachii- long head
| action
shoulder joint: extension, adduction
| elbow joint: extension
113
triceps brachii- medial head
| origin
posterior humerus, inferior to radial groove
| medial intermuscular septum
114
triceps brachii- medial head
| insertion
olecranon of ulna
115
triceps brachii- medial head
| innervation
radial nerve
| C6-C8
116
triceps brachii- medial head
| action
extension at elbow joint
117
triceps brachii- lateral head
| origin
posterior humerus, proximal to radial groove
| lateral intermuscular septum
118
triceps brachii- lateral head
| insertion
olecranon of ulna
119
triceps brachii- lateral head
| innervation
radial nerve
| C6-C8
120
triceps brachii- lateral head
| action
extension at elbow joint
121
pronator teres
| origin
medial epicondyle of humerus
| coronoid process of ulna
122
pronator teres
| insertion
lateral radius- distal to supinator insertion
123
pronator teres
| innervation
median nerve
| C6, C7
124
pronator teres
| action
Elbow: weak flexor
| Forearm pronation
125
flexor carpi radialis
| origin
medial epicondyle of humerus
126
flexor carpi radialis
| insertion
base of 2nd mc
127
flexor carpi radialis
| innervation
median nerve
| C6, C7
128
flexor carpi radialis
| action
Wrist: flexion, abduction (radial deviation) of hand
129
palmaris longus
| origin
medial epicondyle of humerus
130
palmaris longus
| insertion
palmar aponeurosis
131
palmaris longus
| innervation
median nerve
| C7, C8
132
palmaris longus
| action
Elbow: weak flexion
Wrist: flexion tightens palmar aponeurosis
133
flexor carpi ulnaris
| origin
medial epicondyle of humerus
| olecranon of ulna
134
flexor carpi ulnaris
| insertion
pisiform
hook of hamate
base of 5th metacarpal
135
flexor carpi ulnaris
| innervation
ulnar nerve
| C7-T1
136
flexor carpi ulnaris
| action
Wrist: flexion and adduction (ulnar deviation of hand)
137
flexor digitorum superficialis
| origin
medial epicondyle
| upper 1/2 of anterior border of radius
138
flexor digitorum superficialis
| insertion
sides of middle phalanges of 2nd to 5th digits
139
flexor digitorum superficialis
| innervation
median nerve
| C8, T1
140
flexor digitorum superficialis
| action
Elbow: weak flexor
| Wrist, MCP, and PIP joints of 2nd to 5th digits: flexion
141
flexor digitorum profundus
| origin
Proximal 2/3 of flexor surface of ulna
| Interosseous membrane
142
flexor digitorum profundus
| insertion
distal phalanges of 2nd to 5th digits
143
flexor digitorum profundus
| innervation
Anterior interosseous branch of Median nerve
C8,T1
Ulnar nerve
C8, T1
144
flexor digitorum profundus
| action
Wrist, MCP, and PIP, DIP joints of 2nd to 5th digits: flexion
145
flexor pollicis longus
| origin
Midanterior surface of radius
| Adjacent interosseous membrane
146
flexor pollicis longus
| insertion
Distal phalanx of thumb- palmar surface
147
flexor pollicis longus
| innervation
Anterior interosseous branch of Median n.
| C8,T1
148
flexor pollicis longus
| action
Wrist: flexion and abduction (radial deviation) of hand
| CMC, MCP and IP of thumb: flexion
149
pronator quadratus
| origin
Distal quarter of ulna- anterior surface
150
pronator quadratus
| insertion
Distal quarter of radius- anterior surface
151
pronator quadratus
| innervation
Anterior interosseous branch of Median n.
| C8,T1
152
pronator quadratus
| action
Hand: pronation
| Distal radioulnar joint: stabilization
153
brachioradialis
| origin
Distal surface of distal humerus
| lateral intermuscular septum
154
brachioradialis
| insertion
styloid process of ulna
155
brachioradialis
| innervation
radial n.
| C5, C6
156
brachioradialis
| action
Elbow flexion,
| Forearm semipronation
157
2] extensor carpi radialis longus
| origin
Lateral supracondylar ridge of distal humerus,
| Lateral intermuscular septum
158
2] extensor carpi radialis longus
| insertion
2nd mc base
159
2] extensor carpi radialis longus
| innervation
radial n.
| C6, C7
160
2] extensor carpi radialis longus
| action
Elbow: weak flexion,
| Wrist extension and abduction
161
2] extensor carpi radialis brevis
| origin
lateral epicondyle of humerus
162
2] extensor carpi radialis brevis
| insertion
3rd mc base
163
2] extensor carpi radialis brevis
| innervation
radial n.
| C7, C8
164
2] extensor carpi radialis brevis
| action
Elbow: weak flexion,
| Wrist extension and abduction
165
4] extensor digitorum
| origin
lateral epicondyle of humerus
166
4] extensor digitorum
| insertion
dde of 2nd to 5th digits
167
4] extensor digitorum
| innervation
Posterior interosseous nerve (of radial n.)
| C7, C8
168
4] extensor digitorum
| action
Wrist: extension
| MCP, PIP, and DIP of 2nd to 5th digits: extension, abduction of fingers
169
5] extensor digiti minimi
| origin
lateral epicondyle of humerus
170
5] extensor digiti minimi
| insertion
dde of 5th digit
171
5] extensor digiti minimi
| innervation
Posterior interosseous nerve (of radial n.)
| C7, C8
172
5] extensor digiti minimi
| action
Wrist: extension, ulnar abduction of hand
| MCP, PIP, and DIP of 5th digit: extension and abduction of 5th digit
173
6] extensor carpi ulnaris
| origin
lateral epicondyle of humerus
| dorsal surface of ulnar head
174
6] extensor carpi ulnaris
| insertion
base of 5th mc
175
6] extensor carpi ulnaris
| innervation
Posterior interosseous nerve (of radial n.)
| C7, C8
176
6] extensor carpi ulnaris
| action
Wrist: extension, adduction (ulnar deviation) of hand
177
supinator
| origin
Olecranon,
Lateral epicondyle of humerus,
Radial collateral lig.,
Annular lig. of radius
178
supinator
| insertion
Radius- b/w radial tuberosity and insertion of pronator teres
179
supinator
| innervation
posterior interosseous n. of radial n.
| C6, C7
180
supinator
| action
radioulnar joints: supination
181
1] abductor pollicis longus
| origin
Radius and ulna- dorsal surfaces, interosseous membrane
182
1] abductor pollicis longus
| insertion
base of 1st mc
183
1] abductor pollicis longus
| innervation
posterior interosseous n. of radial n.
| C7, C8
184
1] abductor pollicis longus
| action
Radiocarpal joint: abduction of the hand
| CMC and MCP of thumb: extension
185
1] extensor pollicis brevis
| origin
Posterior surface of radius,
| Interosseous mebrane
186
1] extensor pollicis brevis
| insertion
base of pp of thumb
187
1] extensor pollicis brevis
| innervation
Posterior interosseous n. of radial n.
| C7,C8
188
1] extensor pollicis brevis
| action
Radiocarpal joint: abduction (radial deviation) of hand
| CMC joint and MCP of thumb: extension
189
3] extensor pollicis longus
| origin
Posterior surface of ulna,
| Interosseous membrane
190
3] extensor pollicis longus
| insertion
Base of distal phalanx of thumb
191
3] extensor pollicis longus
| innervation
posterior interosseous n. of radial n.
| C7,C8
192
3] extensor pollicis longus
| action
Wrist: extension and abduction (radial deviation) of hand
CMC of thumb: adduction
MCP and IP of thumb: extension
193
4] extensor indicis
| origin
Posterior surface of ulna,
| Interosseous membrane
194
4] extensor indicis
| insertion
Posterior digital extension of 2nd digit
195
4] extensor indicis
| innervation
posterior interosseous n. of radial n.
| C7, C8
196
4] extensor indicis
| action
Wrist: extension
| MCP, PIP, and DIP of 2nd digit: extension
197
adductor pollicis
| origin
Transverse head: 3rd mc (palmar surface)
| Oblique head: capitate bone, 2nd and 3rd mc bases
198
adductor pollicis
| insertion
base of pp on thumb via the ulnar sesamoid
199
adductor pollicis
| innervation
ulnar n.
200
adductor pollicis
| action
CMC joint of thumb: adduction
| MCP joint of thumb: flexion
201
abductor pollicis brevis
| origin
Scaphoid
trapezium
Flexor retinaculum
202
abductor pollicis brevis
| insertion
base of pp of thumb- via radial sesamoid
203
abductor pollicis brevis
| innervation
recurrent branch of median n.
204
abductor pollicis brevis
| action
CMC joint of thumb: abduction
205
flexor pollicis brevis
| origin
Superficial head: flexor retinaculum
| Deep head: capitate bone, trapezium
206
flexor pollicis brevis
| insertion
Base of proximal phalanx of thumb- via the radial sesamoid
207
flexor pollicis brevis
| innervation
Superficial head: recurrent branch of median n.
Deep head: ulnar n.
208
flexor pollicis brevis
| action
CMC joint of thumb: flexion
209
opponens pollicis
| origin
trapezium
210
opponens pollicis
| insertion
radial border of 1st mc
211
opponens pollicis
| innervation
recurrent branch of median n.
212
opponens pollicis
| action
CMC joint of thumb: opposition
213
opponens digiti minimi
| origin
hook of hamate
| flexor retinaculum
214
opponens digiti minimi
| insertion
ulnar border of 5th mc
215
opponens digiti minimi
| innervation
ulnar n.
| C8, T1
216
opponens digiti minimi
| action
Draws mc in palmar direction
| opposition
217
flexor digiti minimi brevis
| origin
hook of hamate
| flexor retinaculum
218
flexor digiti minimi brevis
| insertion
base of 5th pp
219
flexor digiti minimi
| innervation
ulnar n.
| C8, T1
220
flexor digiti minimi brevis
| action
MCP joint of little finger: flexion
221
abductor digiti minimi
| origin
pisiform
222
abductor digiti minimi
| insertion
Ulnar base of 5th pp
| dde of 5th digit
223
abductor digiti minimi
| innervation
ulnar n.
| C8, T1
224
abductor digiti minimi
| action
MCP joint of little finger: flexion and abduction
| PIP and DIP joints of little finger: extension
225
1st lumbricals
| origin
Tendons of flexor digitorum profundus (radial sides)
226
1st lumbricals
| insertion
2nd digit dde
227
1st lumbricals
| innervation
median n.
| C8, T1
228
1st lumbricals
| action
2nd to 5th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension
229
2nd lumbricals
| origin
tendons of flexor digitorum profundus (radial sides)
230
2nd lumbricals
| insertion
3rd digit dde
231
2nd lumbricals
| innervation
median n.
| C8, T1
232
2nd lumbricals
| innervation
2nd to 5th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension
233
3rd lumbricals
| origin
Tendons of flexor digitorum profundus (bipennate from medial and lateral sides)
234
3rd lumbricals
| insertion
4th digit dde
235
3rd lumbricals
| innervation
deep ulnar n.
| C8, T1
236
3rd lumbricals
| action
2nd to 5th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension
237
4th lumbricals
| origin
Tendons of flexor digitorum profundus (bipennate from medial and lateral sides)
238
4th lumbricals
| insertion
5th digit dde
239
4th lumbricals
| innervation
deep ulnar n.
| C8, T1
240
4th lumbricals
| action
2nd to 5th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension
241
1st dorsal interossei
| origin
1st and 2nd mc
242
1st dorsal interossei
| insertion
2nd digit dde
| 2nd digit pp radial side
243
1st dorsal interossei
| innervation
deep ulnar n.
| C8, T1
244
1st dorsal interossei
| action
2nd to 4th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension and abduction from 3rd digit
245
2nd dorsal interossei
| origin
2nd and 3rd mc
246
2nd dorsal interossei
| insertion
3rd digit dde
| 3rd digit pp radial side
247
2nd dorsal interossei
| innervation
deep ulnar n.
| C8, T1
248
2nd dorsal interossei
| action
2nd to 4th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension and abduction from 3rd digit
249
3rd dorsal interossei
| origin
3rd and 4th mc
250
3rd dorsal interossei
| insertion
3rd digit dde
| 3rd digit pp ulnar side
251
3rd dorsal interossei
| innervation
deep ulnar n.
| C8, T1
252
3rd dorsal interossei
| action
2nd to 4th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension and abduction from 3rd digit
253
4th dorsal interossei
| origin
4th and 5th mc
254
4th dorsal interossei
| insertion
4th digit dde
| 4th pp ulnar side
255
4th dorsal interossei
| innervation
deep ulnar n.
| C8, T1
256
4th dorsal interossei
| action
2nd to 4th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension and abduction from 3rd digit
257
1st palmar interossei
| origin
ulnar side of 2nd mc
258
1st palmar interossei
| insertion
2nd digit dde
| 2nd pp base
259
1st palmar interossei
| innervation
deep ulnar n.
| C8, T1
260
1st palmar interossei
| action
2nd, 4th, and 5th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension and adduction toward 3rd digit
261
2nd palmar interossei
| origin
radial side of 4th mc
262
2nd palmar interossei
| insertion
4th digit dde
| 4th pp base
263
2nd palmar interossei
| innervation
deep ulnar n.
| C8, T1
264
2nd palmar interossei
| action
2nd, 4th, and 5th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension and adduction toward 3rd digit
265
3rd palmar interossei
| origin
radial side of 5th mc
266
3rd palmar interossei
| insertion
5th digit dde
| 5th pp base
267
3rd palmar interossei
| innervation
deep ulnar n.
| C8, T1
268
3rd palmar interossei
| action
2nd, 4th, and 5th digits:
- MCP joints: flexion
- proximal and distal IP joints: extension and adduction toward 3rd digit
