Unit 2 Flashcards
(260 cards)
1
Q
Brachioradialis Origin
A
Proximal 2/3 of lateral supra-epicondylar ridge of humerus
2
Q
Brachioradialis Insertion
A
Lateral surface of distal end of radius proximal to styloid process
3
Q
Brachioradialis Innervation
A
Radial Nerve (C5, C6, C7)
4
Q
Brachioradialis Action
A
Relatively weak flexion of elbow joint, maximal when forearm is in midpronated position
5
Q
Extensor carpi radialis longus Origin
A
Lateral supra-epicondylar ridge of humerus
6
Q
Extensor carpi radialis longus Insertion
A
Dorsal aspect of base of 2nd metacarpal
7
Q
Extensor carpi radialis longus Innervation
A
Radial Nerve (C6, C7)
8
Q
Extensor carpi radialis longus Action
A
Extend and abduct wrist joint
9
Q
Extensor carpi radialis brevis Origin
A
Lateral epicondyle of humerus
10
Q
Extensor carpi radialis brevis Insertion
A
Dorsal aspect of base of 3rd metacarpel
11
Q
Extensor carpi radialis brevis Innervation
A
Deep branch of radial nerve (C7, C8)
12
Q
Extensor carpi radialis brevis Action
A
Extend and abduct wrist joint; active during fist clenching
13
Q
Extensor Digitorum Origin
A
Lateral epicondyle of humerus
14
Q
Extensor Digitorum Insertion
A
Extensor expansions of medial four fingers
15
Q
Extensor Digitorum Innervation
A
Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve
16
Q
Extensor Digitorum Action
A
Extend wrist joint; extend medial four fingres primarily at metacarpopholangeal joints, secondarily at interphalangeal joints
17
Q
Extensor digiti minimi Origin
A
Lateral epicondyle of humerus
18
Q
Extensor digiti minimi Insertion
A
Extensor expansion of 5th finger
19
Q
Extensor digiti minimi Innervation
A
Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve
20
Q
Extensor digiti minimi Action
A
Extends wrist joint; extends 5th finger primarily at metacarpophalangeal joints, secondarily at interphalangeal joint
21
Q
Extensor carpi ulnaris Origin
A
Lateral epicondyle of humerus; posterior border of ulna via a shared aponeurosis
22
Q
Extensor carpi ulnaris Insertion
A
Dorsal aspect of base of 5th metacarpal
23
Q
Extensor carpi ulnaris Innervation
A
Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve
24
Q
Extensor carpi ulnaris Action
A
Extends and adducts wrist joint (also active during fist clenching)
25
Supinator Origin
Lateral epicondyle of humerus, radial collateral and anular ligaments, supinator fossa, crest of ulna
26
Supinator Insertion
Lateral, posterior, and anterior surfaces of proximal third of radius
27
Supinator Innervation
Deep branch of radial nerve (C7, C8)
28
Supinator Action
Supinates forearm; rotates radius to turn palm anteriorly or superiorly (if elbow is flexed)
29
Abductor pollicis longus Origin
Posterior surface of proximal halves of ulna, radius, and interosseous membrane
30
Abductor pollicis longus Insertion
Base of 1st metacarpal
31
Abductor pollicis longus Innervation
Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve
32
Abductor pollicis longus Action
Extends wrist joint; abducts thumb and extends it at carpometacarpal joint
33
Extensor pollicis longus Origin
Posterior surface of middle third of ulna and interosseous membrane
34
Extensor pollicis longus Insertion
Dorsal aspect of base of distal phalanx of thumb
35
Extensor pollicis longus Innervation
Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve
36
Extensor pollicis longus Action
Extends wrist joint; extends distal phalanx of thumb at interphalangeal joint; extends metacarpophalangeal and carpometacarpal joints
37
Extensor pollicis brevis Origin
Posterior surface of distal third of radius and interosseous membrane
38
Extensor pollicis brevis Insertion
Dorsal aspect of base of proximal phalanx of thumb
39
Extensor pollicis brevis Innervation
Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve
40
Extensor pollicis brevis Action
Extends wrist joint; extends proximal phalanx of thumb at metacarpophalangeal joint; extends carpometacarpal joint
41
Extensor indicis Origin
Posterior surface of distal third of ulna and interosseous membrane
42
Extensor indicis Insertion
Extensor expansion of 2nd finger
43
Extensor indicis Innervation
Posterior interosseous nerve (C7, C8), continuation of deep branch of radial nerve
44
Extensor indicis Action
Extends wrist joint; extends 2nd finger (enabling its independent extension); helps extend hand at wrist
45
Pronator Teres Origin
Ulnar head: coronoid process of ulna
| Humeral head: medial epicondyle of humerus
46
Pronator Teres Insertion
Middle of convexity of lateral surface of radius
47
Pronator Teres Innervation
Median nerve (C6, C7)
48
Pronator Teres Action
Pronates and flexes forearm
49
Flexor carpi radialis Origin
Medial epicondyle of humerus
50
Flexor carpi radialis Insertion
Base of 2nd (3rd) metacarpal
51
Flexor carpi radialis Innervation
Median nerve (C6, C7)
52
Flexor carpi radialis Action
Flexes and abducts hand at wrist
53
Palmaris longus Origin
Medial epicondyle of humerus
54
Palmaris longus Insertion
Distal half of flexor retinaculum, palmar aponeurosis
55
Palmaris longus Innervation
Median nerve (C7, C8)
56
Palmaris longus Action
Flexes hand (at wrist) and tenses palmar aponeurosis
57
Flexor carpi ulnaris Origin
Ulnar head: olecranon and posterior border of ulna (via aponeurosis)
Humeral head: medial epicondyle of humerus
58
Flexor carpi ulnaris Insertion
Pisiform, hook of hamate, 5th metacarpal
59
Flexor carpi ulnaris Innervation
Ulnar nerve (C7, C8)
60
Flexor carpi ulnaris Action
Flexes and adducts hand at wrist
61
Flexor digitorum superficialis Origin
Humero-ulnar head: medial epicondyle of humerus and coronoid process of ulna
Radial head: oblique line of radius
62
Flexor digitorum superficialis Insertion
Shafts of middle phalanges of medial four digits
63
Flexor digitorum superficialis Innervation
Median nerve (C7, C8, T1)
64
Flexor digitorum superficialis Action
Flexes wrist joint; flexes proximal interphalangeal joints of middle four digits; acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints
65
Flexor digitorum profundus Origin
Proximal three quarters of medial and anterior surfaces of ulna and interosseous membrane
66
Flexor digitorum profundus Insertion
Bases of distal phalanges of 2nd, 3rd, 4th, and 5th digits
67
Flexor digitorum profundus Innervation
```
Lateral part (to digits 2 and 3): median nerve (C8, T1) (anterior interosseous branch)
Medial part (to digits 4 and 5): ulnar nerve (C8, T1)
```
68
Flexor digitorum profundus Action
Flexes wrist joint; flexes distal interphalangeal joints of digits 2, 3, 4, and 5; assists in wrist flexion
69
Flexor pollicis longus Origin
Anterior surface of radius and adjacent interosseous membrane
70
Flexor pollicis longus Insertion
Base of distal phalanx of thumb
71
Flexor pollicis longus Innervation
Anterior interosseous nerve, from median nerve (C8, T1)
72
Flexor pollicis longus Action
Flexes wrist; flexes metacarpophalangeal and interphalangeal joints of thumb
73
Pronator quadratus Origin
Distal quarter of anterior surface of ulna
74
Pronator quadratus Insertion
Distal quarter of anterior surface of radius
75
Pronator quadratus Innervation
Anterior interosseous nerve, from median nerve (C8, T1)
76
Pronator quadratus Action
Pronates forearm; deep fibers bind radius and ulna together
77
Opponens pollicis Origin
Flexor retinaculum and tubercles of scaphoid and trapezium
78
Opponens pollicis Insertion
Lateral side of 1st metacarpal
79
Opponens pollicis Innervation
Recurrent branch of median nerve (C8, T1)
80
Opponens pollicis Action
To oppose thumb, it draws 1st metacarpal medially to cetner of palm and rotates it medially
81
Abductor pollicis brevis Origin
Flexor retinaculum and tubercles of scaphoid and trapzium
82
Abductor pollicis brevis Insertion
Lateral side of base of proximal phalanx of thumb
83
Abductor pollicis brevis Innervation
Recurrent branch of median nerve (C8, T1)
84
Abductor pollicis brevis Action
Abducts thumb; helps oppose it
85
Flexor pollicis brevis Origin
Flexor retinaculum and tubercles of scaphoid and trapezium
86
Flexor pollicis brevis Insertion
Lateral side of base of proximal phalanx of thumb
87
Flexor pollicis brevis Innervation
Superficial head: Recurrent branch of median nerve (C8, T1)
| Deep head: Deep branch of ulnbar nerve (C8, T1)
88
Flexor pollicis brevis Action
Flexes thumb
89
Adductor pollicis Origin
Oblique head: bases of 2nd and 3rd metacarpals, capitate, adjacent carpals
Transverse head: surface of shaft of 3rd metacarpal
90
Adductor pollicis Insertion
Medial side of base of proximal phalanx of thumb
91
Adductor pollicis Innervation
Deep branch of ulnar nerve (C8, T1)
92
Adductor pollicis Action
Adducts thumb toward lateral border of palm
93
Abductor digiti minimi Origin
Pisiform
94
Abductor digiti minimi Insertion
Medial side of base of proximal phalanx of 5th finger
95
Abductor digiti minimi Innervation
Deep branch of ulnar nerve (C8, T1)
96
Abductor digiti minimi Action
Abducts 5th finger; assists in flexion of its proximal phalanx
97
Flexor digiti minimi brevis Origin
Hook of hamate and flexor retinaculum
98
Flexor digiti minimi brevis Insertion
Medial side of base of proximal phalanx of 5th finger
99
Flexor digiti minimi brevis Innervation
Deep branch of ulnar nerve (C8, T1)
100
Flexor digiti minimi brevis Action
Flexes proximal phalanx of 5th finger
101
Opponens digiti mini Origin
Hook of hamate and flexor retinaculum
102
Opponens digiti mini Insertion
Medial border of 5th metacarpal
103
Opponens digiti mini Innervation
Deep branch of ulnar nerve (C8, T1)
104
Opponens digiti mini Action
Draws 5th metacarpal anterior and rotates it, bringing 5th finger into opposition with thumb
105
Lumbricals Origin
1 and 2: lateral two tendons of flexor digitorum profundus (as unipennate muscles)
3 and 4: medial three tendons of flexor digitorum profundus (as bipenate muscles)
106
Lumbricals Insertion
Lateral sides of extensor expansions of 2nd--5th fingers
107
Lumbricals Innervation
1 and 2: Median nerve (C8, T1)
| 3 and 4: Deep branch of ulnar nerve (C8, T1)
108
Lumbricals Action
Flex metacarpophalangeal joints; extend interphalangeal joints of 2nd-5th fingers
109
Dorsal interossei, 1-4 Origin
Adjacent sides of 2 metacarpals (as bipennate muscles)
110
Dorsal interossei, 1-4 Insertion
Bases of proximal phalanges; extensor expansions of 2nd-4th fingers
111
Dorsal interossei, 1-4 Innervation
Deep branch of ulnar nerve (C8, T1)
112
Dorsal interossei, 1-4 Action
Abduct 2nd-4th fingers from axial line; act with lumbricals in flexing metacarpophalangeal joints and extending interphalangeal joints
113
Palmar inerossei, 1-3 Origin
Palmar surfaces of 2nd, 4th, and 5th metacarpals (as unipennate muscles)
114
Palmar inerossei, 1-3 Insertion
Bases of proximal phalanges; extensor expansions of 2nd, 4th, and 5th fingers
115
Palmar inerossei, 1-3 Innervation
Deep branch of ulnar nerve (C8, T1)
116
Palmar inerossei, 1-3 Action
Adduct 2nd, 4th, and 5th fingers toward axial line; assist lumbricals in flexing metacarpophalangeal joints and extend interphalangeal joints
117
External Intercostal Origin
Inferior border of ribs
118
External Intercostal Insertion
Superior border of ribs
119
External Intercostal Innervation
Intercostal nerve
120
External Intercostal Action
During forced insipiration: elevates ribs
121
Internal Intercostal Origin
Superior border of ribs
122
Internal Intercostal Insertion
Inferior border of ribs
123
Internal Intercostal Innervation
Intercostal nerve
124
Internal Intercostal Action
During forced respiration: interosseus part depresses ribs: interchondral part elevates ribs
125
Innermost Intercostal Origin
Inferior border of ribs
126
Innermost Intercostal Insertion
Superior border of ribs
127
Innermost Intercostal Innervation
Intercostal nerve
128
Innermost Intercostal Action
During forced respiration: interosseus part depresses ribs: interchondral part elevates ribs
129
Transversus Thoracis Origin
Posterior surface of lower sternum
130
Transversus Thoracis Insertion
Internal surface of costal cartilages 2-6
131
Transversus Thoracis Innervation
Intercostal nerve
132
Transversus Thoracis Action
Weakly depresses ribs
133
External Oblique Origin
External surfaces of 5th-12th ribs
134
External Oblique Insertion
Linea alba, pubic tubercle, and anterior half of illiac crest
135
External Oblique Innervation
Thoraco-abdominal nerves (anterior rami of T7-T11) and subcostal nerve
136
External Oblique Action
Compress and support abdominal viscera; flex and rotate trunk
137
Internal Oblique Origin
Thoracolumbar fascia, anterior two thirds of illiac crest, and connective tissue deep to inguinal ligament
138
Internal Oblique Insertion
Inferior borders of 10th-12th ribs, linea alba, and pubis via conjoint tendon
139
Internal Oblique Innervation
Thoraco-abdominal nerves (anterior rami of T7-T11), subcostal and first lumbar nerve
140
Internal Oblique Action
Compress and support abdominal viscera; flex and rotate trunk
141
Transversus Abdominis Origin
Internal surfaces of 7th-12th rcostal cartilages, thoracolumbar fascia, illiac crest, and connective tissue deep to inguinal ligament
142
Transversus Abdominis Insertion
Linea alba with aponeurosis of internal oblique, pubic crest, and pubis via conjoint tendon
143
Transversus Abdominis Innervation
Thoraco-abdominal nerves (anterior rami of T7-T11), subcostal and first lumbar nerve
144
Transversus Abdominis Action
Compresses and supports abdominal viscera
145
Rectus Abdominis Origin
Pubic symphysis and pubic crest
146
Rectus Abdominis Insertion
Xiphoid process of 5th-7th costal cartilages
147
Rectus Abdominis Innervation
Thoraco-abdominal and subcostal nerves (anterior rami of T7-T12 spinal nerves)
148
Rectus Abdominis Action
Flexes trunk (lumbar vertebrae) and compresses abdominal viscera, stabilizes and controls tilt of pelvis (antilordosis)
149
Psoas Major Origin
Transverse processes of lumbar vertebrae; sides of bodies of T12-S1 vertebrae and intervening IV discs
150
Psoas Major Insertion
By a strong tendon to lesser trochanter of femur
151
Psoas Major Innervation
Lumbar plexus via anterior branches of nerves L2-L4
152
Psoas Major Action
Acting inferiorly with iliacus, flexes thigh; acting superiorly, flexes vertebral column laterally to balance the trunk; when sitting, acts inferiorly with iliacus to flex trunk
153
Iliacus Origin
Superior two thirds of iliac fossa, ala of sacrum, and anterior sacro-illiac ligaments
154
Iliacus Insertion
Lesser trochanter of femur and shaft inferior to it and to psoas major tendon
155
Iliacus Innveration
Femoral Nerve (L2-L4)
156
Iliacus Action
Flexes thigh and stabilizes hip joint; acts with psoas major
157
Quadratus Lumborum Origin
Medial half of inferior border of 12th rib and tips of lumbar transverse processes
158
Quadratus Lumborum Insertion
Illiolumbar ligament and internal lip of illiac crest
159
Quadratus Lumborum Innervation
Anterior branches of T12 and L1-L4 nerves
160
Quadratus Lumborum Action
Extends and laterally flexes vertebral column; fixes 12th rib during inspiration
161
Psoas Minor Origin
T12-L1 vertbrae and IV discs
162
Psoas Minor Insertion
Pectineal line and illiopoectineal eminence
163
Psoas Minor Innervation
Lumbar plexus via anterior branches of nerves L2-L4
164
Psoas Minor Action
Acting inferiorly with iliacus, flexes thigh; acting superiorly, flexes vertebral column laterally to balance the trunk; when sitting, acts inferiorly with iliacus to flex trunk
165
Obturator Internus Origin
Pelvic surface of illium and ischium; obturator membrane
166
Obturator Internus Insertion
Greater trochanter of femur
167
Obturator Internus Innervation
Nerve to obturator internus (L5, S1, S2)
168
Obturator Internus Action
Laterally rotates hip joint; assists in holding head of femur in acetabulum
169
Piriformis Origin
Pelvic surface of 2nd-4th sacral segments; superior margin of greater sciatic notch and sacrotuberous ligament
170
Piriformis Insertion
Greater trochanter of femur
171
Piriformis Action
Laterally rotates hip joint; abducts hip joint; assists in holding head of femur in acetabulum
172
Piriformis Innervation
Anterior rami of S1 and S2
173
Piriformis Action
Laterally rotates hip joint; abducts hip joint; assists in holding head of femur in acetabulum
174
Levator Ani (pubococcygeous and illiococcygeus) Origin
Body of pubis, tendinous arch of levator ani, ischial spine
175
Levator Ani (pubococcygeous and illiococcygeus) Insertion
Perineal body, cocyx, anococcygeal ligament, walls of prostate or vagina, rectum, anal canal
176
Levator Ani (pubococcygeous and illiococcygeus) Innervation
Nerve to levator ani (branches of S4), inferior anal (rectal) nerve, cocygeal plexus
177
Levator Ani (pubococcygeous and illiococcygeus) Action
Helps support pelvic visceral; resists increases in intra-abdominal pressure
178
Coccygeus (ischiococcygeus) Origin
Ischial spine
179
Coccygeus (ischiococcygeus) Insertion
Inferior end of sacrum and coccyx
180
Coccygeus (ischiococcygeus) Innervation
Branches of S4 and S5 nerves
181
Coccygeus (ischiococcygeus) ACtion
Forms small part of pelvic diaphragm that supports pelvic viscera; flexes coccyx
182
Gluteus Maximus Origin
Illium posterior to posterior gluteal line dorsal surface of sacrum and coccyx; scarotberous ligament
183
Gluteus Maximus Insertion
Most fibers end in illiotibial tract, which inserts into lateral condyle of tibia; some fibers insert on gluteal tuberosity of femur
184
Gluteus Maximus Innervation
Inferior gluteal nerve (L5, S1, S2)
185
Gluteus Maximus Action
Extends hip joint between flexed and standing positions and assists in its lateral rotation; steadies thigh and assists in rising from sitting position
186
Gluteus Medius Origin
External surface of ilium between anterior and posterior gluteal lines
187
Gluteus Medius Insertion
Lateral surface of greater trochanter of femur
188
Gluteus Medius Innervation
Superior gluteal nerve (L4, L5, S1)
189
Gluteus Medius Action
Abduct and anterior portions medially rotate hip joint; keep pelvis level when opposite limb is elevated
190
Gluteus Minimus Origin
External surface of illium between anterior and inferior gluteal lines
191
Gluteus Minimus Insertion
Anterior surface of greater trochanter of femur
192
Gluteus Minimus Innervation
Superior gluteal nerve (L4, L5, S1)
193
Gluteus Minimus Action
Abduct and anterior portions medially rotate hip joint; keep pelvis level when opposite limb is elevated
194
Tensor Fasciae Latae Origin
Anterior superior iliac spine; anterior part of iliac crest
195
Tensor Fasciae Latae Insertion
Illiotibial tract, which attaches to lateral condyle of tibia (Gerdy's tubercle)
196
Tensor Fasciae Latae Innervation
Superior gluteal nerve (L4, L5, S1)
197
Tesnor Fasciae Latae Action
Flexes hip joint; acts with gluteus maximus to stabilize extended knee joint
198
Gemelli superior and inferior Origin
Superior: Ischial spine
Inferior: Ischial tuberosity
199
Gemelli superior and inferior Insertion
Medial surface of greater trochanter of femur
200
Gemelli superior and inferior Innervation
Superior: nerve to obturator internus (L5, S1)
Inferior: nerve to quadratus femoris (L5, S1)
201
Gemelli superior and inferior Action
Laterally rotate exteneded hip joint; abduct flexed hip joint; steady femoral head in acetabulum (stabilizes hip joint)
202
Quadratus Femoris Origin
Lateral border of ischial tuberosity
203
Quadratus Femoris Insertion
Quadrate tubercle on intertrochanteric crest of femur and area inferior to it
204
Quadratus Femoris Innervation
Nerve to quadratus femoris (L5, S1)
205
Quadratus Femoris Action
Laterally rotates hip joint; also pulls femoral head into acetabulum to stabilize hip joint/pelvis
206
Semitendinosus Origin
Ischial tuberosity
207
Semitendinosus Insertion
Medial surface of superior part of tibia
208
Semitendinosus Innervation
Tibial division of sciatic nerve (L5, S1, S2)
209
Semitendinosus Action
Extend hip joint; flex knee joint and rotate the leg medially when knee is flexed; when hip and knee are flexed, can extend trunk
210
Semimembranosus Origin
Ischial Tuberosity
211
Semimembranosus Insertion
Posterior part of medial condyle of tibia; reflected attachment forms oblique popliteal ligament
212
Semimembranosus Innervation
Tibial division of sciatic nerve (L5, S1, S2)
213
Semimembranosus Action
Extend hip joint; flex knee joint and rotate the leg medially when knee is flexed; when hip and knee are flexed, can extend trunk
214
Biceps femoris Origin
Long head: Ischial tuberosity
| Short head: Linea aspera and lateral supracondylar line of femur
215
Biceps femoris Insertion
Lateral side of head of fibula; tendon is split at this site by fibular collateral ligament of knee
216
Biceps femoris Innervation
Long head: tibial division of sciatic nerve (L5, S1, S2)
| Short head: common fibular division of sciatic nerve (L5, S1, S2)
217
Biceps femoris Action
Flexes knee joint and rotates it laterally when knee is flexed; extends hip joint
218
Pectineus Origin
Superior ramus of pubis
219
Pectineus Insertion
Pectineal line of femur, just inferior to lesser trochanter
220
Pectineus Innervation
Femoral Nerve (L2, L3); may receive branch from obturator nerve
221
Pectineus Action
Adducts and flexes hip joint; assists with medial rotation of hip joint
222
Sartorius Origin
Anterior superior illiac spiceand superior part of notch inferior to it
223
Sartorius Insertion
Superior part of medial surface of tibia
224
Sartorius Innervation
Femoral Nerve (L2, L3)
225
Sartorius Action
Flexes, abducts, and laterally rotates hip joint; flexes knee joint
226
Rectus Femoris Origin
Anterior inferior illiac spine and ilium superior to acetabulum
227
Rectus Femoris Insertion
Quadriceps tendon
228
Rectus Femoris Innervation
Femoral Nerve (L2, L3, L4)
229
Rectus Femoris Action
Extends knee joint; stabilizes hip joint and helps iliopsoas flex hip joint
230
Vastus Lateralis Origin
Greater trochanter and lateral lip of linea aspera
231
Vastus Lateralis Insertion
Quadriceps tendon, tibia and patella via aponeuroses
232
Vastus Lateralis Innervation
Femoral Nerve (L2, L3, L4)
233
Vastus Lateralis Action
Extends knee joint
234
Vastus Medialis Origin
Intertrochanteric line and medial lip of linea aspera
235
Vastus Medialis Insertion
Quadriceps tendon, tibia and patella via aponeuroses
236
Vastus Medialis Innervation
Femoral Nerve (L2, L3, L4)
237
Vastus Intermedius Origin
Anterior and lateral surfaces of shaft of femur
238
Vastus Intermedius Insertion
Quadriceps tendon
239
Vastus Intermedius Innervation
Femoral Nerve (L2, L3, L4)
240
Vastus Intermedius Action
Extends knee joint
241
Adductor Longus Origin
Body of pubis inferior to pubic crest
242
Adductor Longus Insertion
Middle third of linea aspera of femur
243
Adductor Longus Innervation
Obturator Nerve (L2, L3, L4)
244
Adductor Longus Action
Adducts hip joint
245
Adductor Brevis Origin
Body and inferior ramus of pubis
246
Adductor Brevis Insertion
Pectineal line and proximal part of linea aspera of femur
247
Adductor Brevis Innervation
Obturator Nerve (L2, L3, L4)
248
Adductor Brevis Action
Adductss hip joint and to some extend flexes it
249
Adductor Magnus Origin
Adductor part: inferior ramus of pubis, ramus of ischium
| Hamstring part: ischial tuberosity
250
Adductor Magnus Insertion
Adductor part: gluteal tuberosity, linea apsera, medial supracondylar line
Hamstring part: adductor tubercle of femur
251
Adductor Magnus Innervation
Adductor part: obturator nerve (L2, L3, L4)
| Hamstring part: tibial part of sciatic nerve (L4)
252
Adductor Magnus Action
Adducts hip joint; its adductor part also flexes hip joint, and its hamstring part extends it
253
Gracilis Origin
Body and inferior ramus of pubis
254
Gracilis Insertion
Superior part of medial surface of tibia
255
Gracilis Innervation
Obturator nerve (L2, L3)
256
Gracilis Action
Adducts hip joint; flexes knee joint and helps rotate it medially
257
Obturator Externus Origin
Margins of obturator foramen and obturator membrane
258
Obturator Externus Insertion
Trochanteric fossa of femur
259
Obturator Externus Innervation
Obturator Nerve (L3, L4)
260
Obturator Externus Action
Laterally rotates hip joint; pulls head of femur into acetabulum holding pelvis steady
