OIA's Upper Limbs Flashcards
1
Q
Pectoralis major mm. O
A
clavicular head: clavicle
sternal head: anterior sternum and upper costal cartilages
abdominal head: rectus sheath
2
Q
Pec. major Ins.
A
lateral lip of intertubercular groove (humerus)
3
Q
Pec. major innerv.
A
lateral pectoral n.
medial pectoral n. (c5, C6, C7, C8, t1)
4
Q
Pec major action
A
all heads: adduct and medially rotate humerus
sternocostal head: extend humerus when arm s flexed (pulls arm down)
clavicular head: flex humerus
5
Q
pectoralis minor mm. O
A
anterior rib #3-#5
6
Q
pec minor Insert.
A
coracoid process (scapula)
7
Q
pec minor innerv.
A
medial pectoral n. (c8-t1)
8
Q
pec minor action
A
1; depresses scapula and rotates head downward
2; stabilize scap and elevate ribs 3-5 for inhalation
9
Q
subclavius mm. O
A
rib #1
10
Q
sublclavius mm. Insert.
A
inferior surface of clavicle
11
Q
subclavius mm. Innerv.
A
C5, c6, subclavius n.
12
Q
subclavius action
A
1; depress clavicle
2; stabilize clavicle and sternoclavicular jnt
13
Q
serratus anterior mm. O
A
external lateral surface of ribs #1-8/9
14
Q
serratus anterior mm. Ins.
A
anterior surface at medial border of scapula
15
Q
serratus anterior mm. Innerv.
A
long thoracic nn. (c5, C6, C7)
16
Q
serratus anterior mm. action
A
1; protracts scapula and rotates head upward
2; stabilize scapula against thoracic wall
17
Q
Trapezius O
A
Descending fibers: occiput, spinous process c1-c7
middle fibers: ligamentum nuchae & spinous process T1-T4
ascending fibers: spinous process T15-T12
18
Q
trapezius insertion
A
desc. fibers: lateral 1/3 of clavicle
middle fibers: acromion of scap
ascending fibers: scapular spine
19
Q
trap innerv.
A
accessory cranial n. (motor CNX1)
somatic sensory from (C3, C4)
20
Q
trap desc. fib action
A
elevate scap
21
Q
trap middle fib action
A
retracts scap
22
Q
asc. fib action
A
depresses scap
23
Q
all fibers of traps… action
A
rotates scap
24
Q
Lat Dorsi O
A
spinous process t7-t12; thoracolumbar fascia; iliac crest, ribs 9-12
25
Lat dorsi I
floor of intertubercular groove of humerus
26
lat. innerv.
thoracodorsal nn. (c6, c7, c8)
27
lat dorsi action
extends, adducts, and internally rotates humerus; raises body towards arm (?)
28
levator scapulae O
transverse process C1-C4
29
levator scap I
supermedial border of scapula
30
levator scap innerv.
dorsal scapular n. (c4, c5)
31
levator scap action
elevates scapula & rotates head downward; extends and laterally flexes cervical vertebrae
32
rhomboid major origin
spinous process of T1-T4
33
rhomboid major insertion
inferomedial border of scapula
34
rhomboid major innerv.
dorsal scapular nerve (c4, c5)
35
rhomboid major action
retracts scapula and rotates head downward; stabilizes scapula to thoracic wall
36
rhomboid minor O
ligamentum nuchae & spinous process of c6-T1
37
rhomboid minor Insertion
medial border of scapula (at base of spine)(
38
rhomboid minor Innerv.
dorsal scapular nn (c4, c5)
39
rhomboid minor action
retracts scapula and rotates head downward; stab. scapula to thoracic wall
40
deltoid origin
lateral 1/3 of clavicle, acromion and spine of scapula
41
deltoid insertion
deltoid tuberosity of humerus
42
deltoid innerv.
axillary nn. (c5, c6)
43
deltoid action
anterior head: flex, adduct, and internally rotate humerus
middle head: abduct humerus
posterior head: extend, adduct, and externally rotate humerus
44
teres major origin
inferior angle of the scapula
45
teres major insertion
intertubercular groove of humerus
46
teres major inn.
lower subscapular nn. (c5, c6)
47
teres major action
adduct, extend, medially rotate humerus (helps stabilize GHJ)
48
S- supraspinatus origin
supraspinous fossa of scapula
49
supraspinatus insertion
greater tubercle of the humerus!
50
supraspinatus innerv.
suprascapular n. (c4, c5, c6)
51
supraspinatus action
initiates abduction of humerus
| * rotator cuff- prevent inferior glide of humerus!
52
infraspinatus origin
infraspinous fossa of the scapula
53
infraspinatus insertion
greater tubercle of the humerus
54
infraspinatus innerv.
suprascapular nn.
55
suprascapular nn. innervates what 2 mm?? (because its super!)
supraspinatus and infraspinatus
56
infraspinatus action
externally rotate humerus
| *rotator cuff- prevent superior glide of humerus (when flexed)
57
teres minor origin
mid-lateral border of the scapula
58
teres minor insertion
greater tubercle of humerus
59
teres minor innerv.
axillary n. (c5, c6)
60
teres minor action
externally rotate and weak adduction of humerus
| *rotator cuff- stabilizes GHJ
61
subscapularis origin
subscapular fossa of scapula
62
subscapularis insertion
lesser tubercle of humerus
63
subscapularis innerv.
upper and lower subscapular nerves (c5, c6, c7)
64
subscapularis action
adduct and IR humerus!
| *rotator cuff- prevent superior glide of humerus (when flexed)
65
coracobrachialis origin
coracoid process of scapula
66
coracobrachialis insertion
middle 1/3 of medial humerus
67
coracobrachialis innerv.
musculocutanous nn. (c5, c6, c7)
68
coracobrachialis action
flex and adduct humerus
69
biceps brachii (long head) origin
supraglenoid tubercle of scapula
70
biceps brachii (long head) insertion
radial tuberosity and bicipital aponeurosis
71
biceps brachii (long head) innerv.
musculocutaneous nn. (c5, c6, c7)
72
biceps brachii (long head) action
stabilizes GHJ and supinates and flexes forearm/elbow
73
biceps brachii (short head) O
coracoid process of scapula
74
biceps brachii (short head) Insert.
radial tuberosity and bicipital aponeurosis
75
biceps brachii (short head) innerv.
musculocut n. (c5, 6, 7)
76
biceps brachii (short head) action
supinates and flexes forearm/ elbow
77
brachialis O
distal 1/2 of anterior humerus
78
brachialis Insert.
coronoid process of ulna
79
brachialis innerv.
musculocutaneous n. (c5, c6) and radial nn. (c6, c7)
80
brachialis action
flexes forearm
81
triceps brachii (long head) O
infraglenoid tubercle of scapula
82
triceps brachii (long head) Insert.
olecranon process of the ulna
83
triceps brachii (long head) Innerv.
radial nn. (c6, c7, c8)
84
triceps brachii (long head) action
extends and adducts arm/shoulder
85
triceps brachii (medial head) O
posterior surface of humerus (below RADIAL GROOVE)
86
triceps brachii (medial head) I
olecranon process
87
triceps brachii (medial head) innerv.
radial nn. (c6,c7,c8)
88
triceps brachii (medial head) action
extends forearm/elbow
89
triceps brachii (lateral head) O
posterior surface of humerus (above radial groove)
90
triceps brachii (lateral head) Insert.
olecranon process of ulna
91
triceps brachii (lateral head) innerv/
radial nn. (c6, c7, 8)
92
triceps brachii (lateral head) action
extends forearm/elbow
93
anconeus origin
lateral epicondyle
94
anconeus insertion
lateral suface of olecranon
95
anconeus innerv.
radial nn. (c7, 8 , T1)
96
anconeus action
weakly extends forearm/elbow and stabilizes elbow
97
pronator teres is part of which compartment
flexor/ anterior/ pronator
98
pronator teres origin
medial epicondyle of humerus and coronoid process of ulna
99
pronator teres insertion
lateral surface of proximal 1/3 of radius!
100
pronator teres innerv.
median nn. (c6, c7)
101
pronator teres action
pronates and flexes forearm/elbow
102
flexor carpi radialis origin
medial epicondyle of humerus
103
flexor carpi radialis insertion
base of 2nd metacarpal
104
flexor carpi radialis innerv.
meidan n. (c6, c7)
105
flexor carpi radialis action
flexes and abducts hand at wrist
106
palmaris longus O
medial epicondyle
107
palmaris longus Insert.
palmar aponeurosis
108
palmaris longus innerv.
median n (c7, c8)
109
palmaris longus action
weak elbow flexor; flexes hand at wrist and tenses palmar fascia
110
flexor carpi ulnaris origin
medial epicondyle
111
flexor carpi ulnaris insertion
pisiform, hamate, base of metacarpal 5
112
flexor carpi ulnaris innerv.
ulnar n. (c7, 8)
113
flexor carpi ulnaris action
flexes and adducts hand at wrist
114
flexor digitorum superficialis O
medial epicondyle of humerus and coronoid process of ulna; proximal 1/2 of ant. border of radius
115
flexor digit. superficialis Ins.
palmar shaft of middle phalanges 2-5
116
flexor digit. superficialis innerv.
median n. (c7, c8, T1)
117
flexor digit. superficialis action
weak elbow flexor; flexes digits at proximal IP joint and MCP joint for digits 2-5
118
flexor digitorum profundus origin
proximal 2/3 of anteromedial surface of ulna and interosseous membrane
119
flexor digit. profundus insertion
palmar base of distal phalanges (2-5)
120
flexor digit. profundus innerv.
ulnar n. (c8, T1)
| and median n. (c8, T1)
121
FDP action
flexes digits at proximal IP, distal IP, and mcp joints of digits 2-5
122
flexor pollicis longus origin
anterior surface of proximal radius and interosseous membrane
123
FPL insertion
base of distal phalanx of pollex
124
FPL innerv.
median n (c8, T1) (anterior interosseous?)
125
FPL action
flexes pollex at distal IP joint
126
pronator quadratus origin
distal 1/4 of anterior surface of ulna
127
pronator quadratus insertion
distal 1/4 of anterior surface of radius
128
pronator quad. innerv.
anterior interosseous median n. (c8-t1)
129
pronator quad. action
pronates forearm
130
brachioradialis origin
lateral supraepicondylar ridge
131
brachioradialis insertion
styloid process of the radius
132
brachioradialis innerv.
radial n. (c5, c6)
133
brachioradialis action
flexes forearm
134
extensor carpi radialis longus Origin
lateral supraepicondylar ridge
135
extensor carpi radialis longus insertion
Posterior surface of base of 2nd met.
136
extensor carpi radialis longus innerv.
radial n. (c6, c7)
137
ECRL action
weak forearm flexion; extends and abducts wrist and hand
138
ECRB origin
lateral epicondyle of humerus
139
ECRB insertion
posterior base of 3rd met!
140
ECRB innerv.
radial n. (deep branch) c7, c8
141
ECRB action
weak forearm flexion; extends and abducts wrist and hand (same as ECRL)
142
extensor digitorum origin
lateral epicondyle of humerus
143
extensor digitorum insertion
extensory expansions of digits 2-5
144
extensor digitorum innerv.
radial n. (deep branch) c6, c8
145
extensor digiti minimi origin
lateral epicondyle of humerus
146
extensor digiti minimi insertion
extensor expansion of digit 5
147
extensor carpi ulnaris origin
lateral epicondyle & POSTERIOR ASPECT OF MID SHAFT OF ULNA
148
ECU insertion
Dorsal surface of base of met 5
149
ECU innerv.
radial n. (deep branch c7, c8)
150
ECU action
extends and adducts hand at wrist
151
extensor digiti minimi innerv.
radial n. (deep barnch c7, c8)
152
extensor digiti minimi action
extends digit 5 at mcp and IP joints
153
supinator mm. (extensor) origin
lateral epicondyle and lateral collateral and annular ligaments at elbow
154
supinator insertion
posterior, lateral, and anterior surface of proximal radius
155
supinator innerv.
radial n. (c6, c7)
156
supinator action
supinates forearm/ elbow
157
extensor indicis origin
interosseous membrane and post. surface of distal ulna
158
extensor indicis insertion
extensor expansion of 2nd digit
159
extensor indicis innerv.
radial n. (c7, c8)
160
extensor indicis action
extends 2nd digits, helps extend hand at wrist
161
abductor pollicis longus origin
interosseous membrane and posterior surface of proximal ulna and radius
162
abductor pollicis longus insertion
base of first met. (pollex)
163
abductor pollicis longus innerv.
radial n. (c7, c8)
164
abductor pollicis longus action
abduct hand at wrist; abduct thumb at cmc joint
165
extensor pollicis brevis origin
interosseous membrane and post. surface of distal radius
166
extensor pollicis brevis insertion
base of proximal phalanx of pollex
167
extensor pollicis brevis innerv.
radial nn. (c7, 8)
168
EPB action
abduct hand at wrist; extend thumb and cmc and mcp joint
169
extensor pollicis longus origin
interosseous membrane and posterior surface of middle 1/3 of ulna
170
extensor pollicis longus insertion
base of distal phalanx of pollex
171
extensor pollicis longus innerv.
radial nn. (c7, c8)
172
extensor pollicis longus action
abduct and extends hand at wrist; extends distal phalanx of thumb at 1st IP joint and cmc and mcp joint
173
opponens pollicis origin
flexor retinaculum and scaphoid and trapezium
174
opponens pollicis insertion
lateral side of 1st metacarpal
175
opponens pollicis innerv.
median nn. (recurrent branch) (c8, t1)
176
opponens pollicis action
opposition of thumb at 1st metacarpal
177
abductor pollicis brevis origin
flexor retinaculum and scaphoid and trapezium
178
abductor pollicis brevis insertion
lateral side of base of proximal phalanx of pollex (higher up than opponens pollicis)
179
abductor pollicis brevis innerv.
median n. (c8, t1)
180
abductor pollicis brevis action
abdcuts thumb at cmc joint
181
flexor pollicis brevis origin
flexor retinaculum and scaphoid and trapezium
182
flexor pollicis brevis insertion
lateral side of base of proximal phalanx of pollex
183
flexor pollicis brevis innerv.
ulnar and median nn. (c8, t1)
184
flexor pollicis brevis action
flexes thumb at cmc joint
185
adductor pollicis brevis- oblique head Origin
base of 2nd and 3rd metacarpal and capitate
186
adductor pollicis brevis- oblique head insertion
medial side of base of proximal phalanx of pollex
187
adductor pollicis brevis- oblique head innerv.
ulnar nn. (c8, t1)
188
adductor pollicis brevis- oblique head action
adducts thumb at cmc joint; flexes thumb at mcp joint
189
adductor pollicis brevis- transverse head origin
palmar surface of 3rd met
190
adductor pollicis brevis- transverse head insertion
medial side of base of proximal phalanx of pollex
191
adductor pollicis brevis- transverse head innerv.
ulnar n. (c8, t1)
192
adductor pollicis brevis- transverse head action
adducts thumb at cmc joint; flexes thumb at mcp joint
193
abductor digiti minimi origin
pisiform
194
abductor digiti minimi insertion
medial side of base of proximal phalanx of 5th digit
195
abductor digiti minimi innerv.
ulnar n. (c8, t1)
196
abductor digiti minimi action
abducts 5th digit, assists in flexion of 5th proximal phalanx
197
flexor digiti minimi (brevis) origin
hook of hamate and flexor retinaculum
198
flexor digiti minimi (brevis) insertion
medial side of base of proximal phalanx of 5th digit
199
flexor digiti minimi (brevis) innerv.
ulnar n.
200
flexor digiti minimi (brevis) action
flexes proximal phalanx at mcp joint of 5th digit
201
opponens digiti (minimi) origin
hook of hamate and flexor retinaculum
202
opponens digiti (minimi) insertion
medial border of 5th metacarpal
203
opponens digiti (minimi) innerv.
ulnar n. (c8, t1)
204
opponens digiti (minimi) action
draws 5th metacarpal anterior and rotates it for opposition with the thumb
205
lumbricals origin
tendons of flexor digitorum profundus
206
lumbricals insertion
extensor expansions of proximal phalanges of 2nd-5th digits
207
lumbricals innerv.
median and ulnar n. (c8, t1)
208
lumbricals action
flex mcp joints; extend IP joints of 2nd-5th digits
209
dorsal interossei 1-4 origin
adjacent sides of 2 adjacent metacarpals
210
dorsal interossei 1-4 insertion
base of proximal phalanges; extensor expansions of 2-4 digits
211
dorsal interossei 1-4 innerv.
ulnar nn. (c8, t1)
212
dorsal interossei1-4 action
abducts 2-4 digits; flex of cmc; mcp and extend IP joints
213
palmar interossei 1-3 origin
palmar surface of 2, 4, 5 metacarpals
214
palmar interossei 1-3 insertion
base of proximal phalanges; extensor expansions of 2, 4, 5 digits
215
palmar interossei 1-3 innerv.
ulnar nn. (c8, t1)
216
palmar interossei 1-3 action
adduct 2, 4, 5; flex mcp and extend IP joint
