Muscles Flashcards
"pertinent" innervations, origins, insertions, and actions (244 cards)
1
Q
Trapezius Origin and Insertion
A
Origin: Superior nuchal line of occipital bone and spinous processes of C7-T12
Insertion: Lateral 1/3 of clavicle, acromion, spine of scapula
2
Q
Trapezius Innervation
A
Accessory Nerve (CN XI)
3
Q
Trapezius Actions
A
Elevates, retracts, and rotates scapula; lower fibers depress scapula
4
Q
Latissimus Dorsi Origin and Insertion
A
Origin: spinous processes of T7-L5, thoracolumbar fascia, iliac crest, and last 3 ribs
Insertion: Humerus (intertubercular sulcus)
5
Q
Latissimus Dorsi Innervation
A
Thoracodorsal nerve (C6-C8)
6
Q
Latissimus Dorsi Actions
A
Extends, adducts, and medially rotates humerus at shoulder
7
Q
Levator Scapulae Origins and Insertions
A
Origin: posterior tubercles of transverse processes of C1-C4
Insertion: medial border of scapula from superior angle to spine
8
Q
Levator Scapulae Innervation
A
Dorsal scapular nerve and ventral rami of C3-C4
9
Q
Levator Scapulae Actions
A
elevates scapula medially
10
Q
Rhomboid Minor Origin and Insertion
A
Origin: nuchal ligament, spines of C7+T1 vertebrae
Insertion: medial border of scapula, spine of scapula
11
Q
Rhomboid Minor Innervation
A
Dorsal scapular nerve (C4-C5)
12
Q
Rhomboid Minor Actions
A
retract, elevate, and rotate scapula
13
Q
Rhomboid Major Origin and Insertion
A
Origin: Spinous processes of T2-T5 vertebrae
Insertion: medial border of scapula; below base of spine of scapula
14
Q
Rhomboid Major Innervation
A
Dorsal Scapular Nerve (C4-C5)
15
Q
Rhomboid Major Action
A
retract, elevate, and rotate scapula
16
Q
Splenius Capitis Origin and Insertion
A
Origin: nuchal ligament, spinous processes of C7-T3
Insertion: mastoid process of temporal bone and lateral third of superior nuchal line
17
Q
Splenius Capitis Actions (bilateral and unilateral!)
A
Bilateral: extend head
Unilateral: ipsilateral side bend and rotation
18
Q
Splenius Cervicis Origin and Insertion
A
Origin: spinous processes of T3-T6
Insertion: transverse processes of C1-C3
19
Q
Splenius Cervicis Innervation
A
Dorsal rami of lower cervical nerves
20
Q
Splenius Cervicis Action (bilateral and unilateral!)
A
Bilateral: extend neck
Unilateral: ipsilateral sidebend and rotation
21
Q
Erector Spinae Origin and Insertion
Note: insertions for iliocostalis, longissimus, and spinalis
A
Origin: posterior sacrum, iliac crest, spinous processes of lower lumbar and sacral vertebrae
Insertion:
Iliocostalis: angles of lower ribs and cervical transverse processes
Longissimus: between tubercles and angles of ribs, transverse processes of thoracic and cervical vertebrae, and mastoid process
Spinalis: spinous processes of upper thoracic and midcervical vertebrae
22
Q
Erector Spinae Innervation
A
Dorsal rami of each region
23
Q
Erector Spinae Actions
A
Extends and laterally bends vertebral column and head
24
Q
Semispinalis Origin and Insertion
A
Origin: transverse processes of C4-T12
Insertion: spinous processes of cervical and thoracic regions
25
Semispinalis Action
Extend head, neck, thorax, and rotate them to opposite side
26
Multifidi Origin and Insertion
Origin: sacrum, ilium, transverse processes of T1-T12, and articular processes of C4-C7
Insertion: spinous processes of vertebrae above, spanning 2-4 segments
27
Multifidi Action
Stabilizes the spine
28
Rotatores Origin and Insertion
Origin: transverse processes of C, T, and L regions
Insertion: lamina and transverse processes of C/T/L spines, spanning 1 or 2 segments
29
Rotatores Action
Stabilizes, extends, and rotates spine
30
Deltoid Origin and Insertion
Origin: lateral 1/3 of anterior clavicle, lateral acromion, and inferior edge of spine of scapula
Insertion: deltoid tuberosity of humerus
31
Deltoid Innervation
Anterior and posterior branches of axillary nerve (C5, C6)
32
Deltoid Actions
Note: clavicular part, acromial part, and spinal part
Clavicular Part: flexion + IR
Acromial Part: abduction beyond initial 15 degrees
Spinal Part: extension + ER
33
Supraspinatus Origin and Insertion
Origin: supraspinous fossa of scapula
Insertion: superior facet of greater tubercle of humerus
34
Supraspinatus Innervation
Suprascapular nerve (C5, C6)
35
Supraspinatus Action
initiates arm ABD, acts w/ RTC muscles
36
Infraspinatus Origin and Insertion
Origin: infraspinous fossa of scapula and deep fascia
Insertion: middle facet of greater tuberosity of humerus
37
Infraspinatus Innervation
Suprascapular Nerve (C5, C6)
38
Infraspinatus Action
ER (with teres minor)
39
Teres Minor Origin and Insertion
Origin: Upper 2 thirds of posterior surface of lateral border of scapula
Insertion: inferior facet of greater tuberosity of humerus
40
Teres Minor Innervation
Inferior subscapular nerve (C5, C6)
41
Teres Minor Action
ER
42
Teres Major Origin and Insertion
Origin: posterior surface of inferior angle of scapula
Insertion: medial lip of intertubercular groove of humerus
43
Teres Major Innervation
Inferior subscapular nerve (C5, C6)
44
Teres Major Action
ADD and IR
45
Subscapularis Origin and Insertion
Origin: subscapular fossa
Insertion: lesser tubercle of humerus
46
Subscapularis Innervation
Superior and inferior subscapular nerves (C5-C6)
47
Subscapularis Action
ADD, IR, and helps hold humerus head in glenoid fossa
48
Biceps brachii Origin and Insertion
Note: origin for long and short head
Origin:
Long Head: supraglenoid tubercle of scapula
Short Head: tip of coracoid process of scapula
Insertion: radial tuberosity
49
Biceps brachii Innervation
Musculocutaneous Nerve (C5, C6)
50
Biceps brachii Action
Flexes and supinates forearm and elbow
51
Coracobrachialis Origin and Insertion
Origin: tip of coracoid process of scapula
Insertion: middle 1/3 of medial surface of humerus
52
Coracobrachialis Innervation
Musculocutaneous nerve (C5, C6, C7)
53
Coracobrachialis Action
Flexes and adducts arm at shoulder
54
Brachialis Origin and Insertion
Origin: Distal half of anterior surface of humerus
Insertion: coronoid process and tuberosity of ulna
55
Brachialis Innervation
Musculocutaneous Nerve and Radial Nerve (C7)
56
Brachialis Action
Flexes forearm at elbow
57
Triceps brachii Origin and Insertion
Origin:
Long head: infraglenoid tubercle of scapula
Lateral head: upper half of posterior humerus
Medial head: distal 2/3 of medial and posterior humerus
Insertion: posterior surface of olecranon process of ulna
58
Triceps brachii Innervation
Radial Nerve (C6, C7, C8)
59
Triceps brachii Action
extends arm at elbow; long head stabilizes head of abducted humerus and extends/adducts arm at shoulder
60
Pronator Teres Origin and Insertion
Origin:
Two heads: medial epicondyle of humerus and coronoid process of ulna
Insertion: Midway along lateral surface of radius
61
Pronator Teres Innervation
Median Nerve (C6-C7)
62
Pronator Teres Actions
Pronates forearm and assists with elbow flexion
63
Flexor Carpi Radialis Origin and Insertion
Origin: Medial epicondyle of humerus
Insertion: Base of 2nd Metacarpal
64
Flexor Carpi Radialis Innervation
Median Nerve (C6, C7)
65
Flexor Carpi Radialis Actions
Flexes and abducts hand at wrist
66
Palmaris Longus Origin and Insertion
Origin: medial epicondyle of humerus
Insertion: distal half of flexor retinaculum and palmar aponeurosis
67
Palmaris Longus Innervation
Median Nerve (C7, C8)
68
Palmaris Longus Actions
Flexes hand and tenses palmar aponeurosis
69
Flexor Carpi Ulnaris Origin and Insertion
Origin:
Humeral Hair: medial epicondyle of humerus
Ulnar head: olecranon and posterior border of ulna
Insertion: pisiform bone, hook of hamate bone, and base of 5th metacarpal
70
Flexor Carpi Ulnaris Innervation
Ulnar Nerve (C7, C8, T1)
71
Flexor Carpi Ulnaris Actions
Flexes and adducts hand at wrist
72
Flexor Digitorum Superficialis Origin and Insertion
Origin:
Humeroulnar head: medial epicondyle of humerus and coronoid process of ulna
Radial head: superior half of anterior radius
Insertion: bodies of middle phalangeal bones of medial four digits
73
Flexor Digitorum Superficialis Innervation
Median nerve (C8-T1)
74
Flexor Digitorum Superficialis Actions
Flexes middle and proximal phalangeal bones of medial four digits; also flexes hand at wrist
75
Flexor Digitorum Profundus Origin and Insertion
Origin: medial and anterior surface of proximal three quarters of ulna, and interosseous membrane
Insertion: palmar base f distal phalangeal bones of medial four digits
76
Flexor Digitorum Profundus Innervation (lateral and medial part)
Medial part: ulnar nerve (C8-T1)
Lateral part: medial nerve (C8-T1)
77
Flexor Digitorum Profundus Actions
Flexes distal phalangeal bones of medial four digits; assists in flexion of hand at wrist
78
Flexor Pollicis Longus Origin and Insertion
Origin: Anterior surface of radius and interosseous membrane
Insertion: palmar base of distal phalanx of thumb
79
Flexor Pollicis Longus Innervation
Median nerve (anterior interosseous) (C7-C8)
80
Flexor Pollicis Longus Actions
flexes phalangeal bones of thumb
81
Pronator Quadratus Origin and Insertion
Origin: distal 1/4 of anterior ulna
Insertion: distal 1/4 of anterior radius
82
Pronator Quadratus Innervation
Median Nerve (anterior interosseous) (C7-C8)
83
Pronator Quadratus Actions
Pronates forearm
84
Brachioradialis Origin and Insertion
Origin: proximal 2/3 of lateral supracondylar ridge of humerus
Insertion: lateral side of distal end of radius
85
Brachioradialis Innervation
Radial Nerve (C5-C6)
86
Brachioradialis Actions
Weak flexion of forearm when forearm is midpronated
87
Extensor Carpi Radialis Longus Origin and Insertion
Origin: distal 1/3 of lateral supracondylar ridge of humerus
Insertion: dorsal base of 2nd metacarpal and slip to 3rd metacarpal
88
Extensor Carpi Radialis Longus Innervation
Radial nerve (C6-C7)
89
Extensor Carpi Radialis Longus Action
extends and abducts hand at wrist
90
Extensor Carpi Radialis Brevis Origin and Insertion
Origin: lateral epicondyle o humerus (common extensor tendon)
Insertion: dorsal base of 3rd metacarpal
91
Extensor Carpi Radialis Brevis Innervation
Radial Nerve (deep branch) (C7-C8)
92
Extensor Carpi Radialis Brevis Action
Extends and abducts hand at wrist
93
Extensor Digitorum Origin and Insertion
Origin: lateral epicondyle of humerus
Insertion: extensor expansions of medial four digits
94
Extensor Digitorum Innervation
Posterior interosseous nerve (C7-C8)
95
Extensor Digitorum Actions
extends medial four digits; assists in wrist extension
96
Extensor Digiti Minimi Origin and Insertion
Origin: lateral epicondyle of humerus (common extensor tendon)
Insertion: extensor expansion of 5th digit
97
Extensor Digiti Minimi Innervation
Radial nerve (posterior interosseous) (C7-C8)
98
Extensor Digiti Minimi Action
extends 5th digit
99
Extensor Carpi Ulnaris Origin and Insertion
Origin: lateral epicondyle of humerus (common extensor tendon) and posterior border of ulna
Insertion: dorsal base of 5th metacarpal
100
Extensor Carpi Ulnaris Innervation
Radial nerve (posterior interosseous) (C7-C8)
101
Extensor Carpi Ulnaris Actions
Extends and abducts hand at wrist
102
Anconeus Origin and Insertion
Origin: posterior surface of lateral epicondyle of humerus
Insertion: lateral surface of olecranon and posterior proximal ulna
103
Anconeus Innervation
Radial Nerve (C5-C7)
104
Anconeus Actions
assists triceps in extending elbow; abducts ulna during pronation
105
Supinator Origin and Insertion
Origin: lateral epicondyle of humerus, supinator crest of ulna
Insertion: lateral, posterior, and anterior surfaces of proximal 1/3 of radius
106
Supinator Innervation
Radial nerve (deep branch) (C6-C7)
107
Supinator Action
supinates forearm
108
Abductor Pollicis Longus Origin and Insertion
Origin: posterior surface of ulna, radius, and interosseous membrane
Insertion: base of 1st metacarpal
109
Abductor Pollicis Longus Innervation
Radial nerve (posterior interosseous) (C7-C8)
110
Abductor Pollicis Longus Actions
abducts and extends thumb at carpometacarpal joint
111
Extensor Pollicis Brevis Origin and Insertion
Origin: posterior surface of radius and interosseous membrane
Insertion: dorsal base of proximal phalanx of thumb
112
Extensor Pollicis Brevis Innervation
Radial nerve (posterior interosseous) (C7-C8)
113
Extensor Pollicis Brevis Actions
extends proximal phalanx of thumb a carpometacarpal joint
114
Extensor Pollicis Longus Origin and Insertion
Origin: posterior surface of middle 1/3 of ulna, interosseous membrane
Insertion: dorsal base of distal phalanx of thumb
115
Extensor Pollicis Longus Innervation
Radial nerve (posterior interosseous) (C7-C8)
116
Extensor Pollicis Longus Actions
Extends distal phalanx of thumb at interphalangeal and metacarpophalangeal joints
117
Extensor Indicis Origin and Insertion
Origin: posterior surface of ulna, interosseous membrane
Insertion: extensor expansion of 2nd digit
118
Extensor Indicis Innervation
Radial nerve (posterior interosseous) (C7-C8)
119
Extensor Indicis Actions
Extends 2nd digit and help extend hand at wrist
120
Abductor Pollicis Brevis Origin and Insertion
Origin: flexor retinaculum and tubercles of scaphoid + trapezium bones
Insertion: lateral side of base of proximal phalanx of thumb
121
Abductor Pollicis Brevis Innervation
Median nerve (recurrent branch) (C8-T1)
122
Abductor Pollicis Brevis Actions
Abducts and assists in opposition of thumb
123
Flexor Pollicis Brevis Origin and Insertion
Origin: flexor retinaculum and tubercle of trapezium bone
Insertion: lateral side of base of proximal phalanx of thumb
124
Flexor Pollicis Brevis Innervation
Median nerve (recurrent branch) (C8-T1)
125
Flexor Pollicis Brevis Action
flexes proximal phalanx of thumb
126
Opponens Pollicis Origin and Insertion
Origin: flexor retinaculum and tubercle of trapezium bone
Insertion: lateral side of 1st metacarpal
127
Opponens Pollicis Innervation
Median nerve (recurrent branch) (C8-T1)
128
Opponens Pollicis Actions
draws 1st metacarpal forward and rotates it medially
129
Adductor Pollicis Origin and Insertion
Origin:
Oblique head: bases of 2nd and 3rd metacarpal bones, capitate, and adjacent bones
Transverse head: anterior surface of 3rd metacarpal
Insertion: anterior surface of 3rd metacarpal
130
Adductor Pollicis Innervation
Ulnar nerve (deep branch) (C8-T1)
131
Adductor Pollicis Action
adducts thumb
132
Palmaris Brevis Origin and Insertion
Origin: palmar aponeurosis and flexor retinaculum
Insertion: skin of medial border of palm
133
Palmaris Brevis Innervation
Superficial palmar branch of ulnar nerve (C8)
134
Palmaris Brevis Actions
deepens hollow of hand, assists grip
135
Lumbricals 1 and 2 Origin and Insertion
Origin: lateral two tendons of flexor digitorum profundus
Insertion: lateral sides of extensor expansion of digits 2 and 3
136
Lumbricals 1 and 2 Innervation
Median Nerve (C8-T1)
137
Lumbricals 1 and 2 Actions
Extends digits at interphalangeal joints and flexes metacarpophalangeal joints
138
Lumbricals 3 and 4 Origin and Insertion
Origin: medial 3 tendons of flexor digitorum profundus
Insertion: lateral sides of extensor expansion of digits 4 and 5
139
Lumbricals 3 and 4 Innervation
Ulnar nerve (deep branch) (C8-T1)
140
Lumbricals 3 and 4 Action
extends digits at interphalangeal joints and flexes metacarpophalangeal joints
141
Gluteus Maximus Origin and Insertion
Origin: ilium posterior to posterior gluteal line, dorsal surface of sacrum and coccyx, sacrotuberous ligament
Insertion: most fibers end in iliotibial tract that inserts into lateral condyle of tibia; some fibers insert into gluteal tuberosity of femur
142
Gluteus Maximus Innervation
Inferior gluteal nerve (L5-S2)
143
Gluteus Maximus Actions
extends flexed thigh, assists in ER, and abducts thigh
144
Gluteus Medius Origin and Insertion
Origin: lateral surface of ilium between anterior and posterior gluteal lines
Insertion: lateral surface of greater trochanter of femur
145
Gluteus Medius Innervation
Superior gluteal nerve (L4-S1)
146
Gluteal Medius Actions
abducts and internally rotates thigh at hip, steadies pelvis on leg when opposite leg is raised
147
Gluteus Minimus Origin and Insertion
Origin: lateral surface of ilium between anterior and inferior gluteal lines
Insertion: anterior surface of greater trochanter of femur
148
Gluteus Minimus Innervation
superior gluteal nerve (L4-S1)
149
Gluteus Minimus Actions
abducts and medially rotates thigh at hips; steadies pelvis on leg when opposite leg is raised
150
Piriformis Origin and Insertion
Origin: anterior surface of sacral segments 2-4, sacrotuberous ligament
Insertion: superior border of greater trochanter of femur
151
Piriformis Innervation
Anterior rami of upper L5, S1, S2
152
Piriformis Actions
laterally rotates extended thigh, abducts flexed thigh at hip
153
Obturator Internus Origin and Insertion
Origin: pelvic surface of obturator membrane and surrounding bone
Insertion: medial surface of greater trochanter of femur
154
Obturator Internus Innervation
Nerve to obturator internus muscle (L5-S2)
155
Obturator Internus Actions
laterally rotates extended thigh, abducts flexed thigh at hip
156
Quadratus Femoris Origin and Insertion
Origin: lateral margin of ischial tuberosity
Insertion: quadrate tubercle on intertrochanteric crest of femur
157
Quadratus Femoris Innervation
Nerve to quadratus femoris muscle (L4-S1)
158
Quadratus Femoris Action
laterally rotates thigh at hip
159
Iliopsoas/Psoas Major Origin and Insertion
Origin: sides of vertebrae T12-L5 and transverse processes of L1-L5
Insertion: lesser trochanter of femur
160
Iliopsoas/Psoas Major Innervation
Anterior rami of lumbar spinal nerves 1-3
161
Iliopsoas/Psoas Major Actions
flexes thigh at hip and stabilizes at hip
162
Iliacus Origin and Insertion
Origin: superior 2/3 of iliac fossa, ala of sacrum, and anterior sacroiliac ligaments
Insertion: lesser trochanter of femur and body inferior to it, to psoas major tendon
163
Iliacus Innervation
Femoral nerve (L2-L3)
164
Iliacus Actions
flexes thigh at hip and stabilizes hip joint; acts with psoas major
165
Tensor Fasciae Latae Origin and Insertion
Origin: anterior superior iliac spine and anterior part of iliac crest
Insertion: iliotibial tract that attaches to lateral condyle of tibia
166
Tensor Fasciae Latae Innervation
Superior gluteal nerve (L4-L5)
167
Tensor Fasciae Latae Actions
abducts, medially rotates, and flexes thigh at hip; helps to keep knee extended
168
Sartorius Origin and Insertion
Origin: anterior superior iliac spine and superior part of notch below it
Insertion: superior part of medial surface of tibia
169
Sartorius Innervation
Femoral nerve (L2-L3)
170
Sartorius Actions
abducts, laterally rotates, and flexes thigh; flexes knee joint
171
Quadratus Femoris Origin and Insertion
Origin: lateral margin of ischial tuberosity
Insertion: quadrate tubercle on intertrochanteric crest of femur
172
Quadratus Femoris Innervation
Nerve to quadratus femoris muscle (L4-S1)
173
Quadratus Femoris Action
Laterally rotates thigh at hip
174
Rectus Femoris Origin and Insertion
Origin: lateral margin of ischial tuberosity
Insertion: quadrate tubercle on intertrochanteric crest of femur
175
Rectus Femoris Innervation
Femoral nerve (L2-L4)
176
Rectus Femoris Actions
Extends leg at knee joint and flexes thigh at hip joint
177
Vastus Lateralis Origin and Insertion
Origin: greater trochanter, lateral lip of linea aspera of femur
Insertion: base of patella and to tibial tuberosity via patellar tendon/ligament
178
Vastus Lateralis Innervation
Femoral nerve (L2-L4)
179
Vastus Lateralis Action
Extends leg at knee joint
180
Vastus Medialis Origin and Insertion
Origin: intertrochanteric line, medial lip of linea aspera of femur
Insertion: base of patella and to tibial tuberosity via patellar tendon/ligament
181
Vastus Medialis Innervation
Femoral Nerve (L2-L4)
182
Vastus Medialis Action
Extends leg at knee joint
183
Vastus Intermedius Origin and Insertion
Origin: anterior and lateral surfaces of body of femur
Insertion: base of patella and to tibial tuberosity via patellar tendon/ligament
184
Pectineus Origin and Insertion
Origin: superior ramus of pubis
Insertion: pectineal line of femur
185
Pectineus Innervation
Femoral nerve (L2-L3) and sometimes Obturator nerve
186
Pectineus Action
adducts and flexes thigh at hip
187
Adductor Longus Origin and Insertion
Origin: body of pubis, inferior pubic crest
Insertion: middle 1/ of linea aspera of femur
188
Adductor Longus Innervation
Obturator nerve (anterior division) (L2-L4)
189
Adductor Longus Action
Adducts thigh at hip
190
Adductor Brevis Origin and Insertion
Origin: body and inferior pubic ramus
Insertion: pectineal line and proximal part of linea aspera of femur
191
Adductor Brevis Innervation
Obturator nerve (L2-L4)
192
Adductor Brevis Actions
adducts thigh at hip, weak hip flexor
193
Adductor Magnus Origin and Insertion (adductor part and hamstring part)
Origin:
ADD: inferior pubic ramus, ramus of ischium
HS: sciatic nerve (tibial division)
Insertion:
ADD: gluteal tuberosity, linea aspera, supracondylar line
HS: adductor tubercle of femur
194
Adductor Magnus Innervation (adductor part and hamstring part)
ADD: Obturator nerve (L2-L4)
HS: tibial nerve (L4)
195
Adductor Magnus Actions (adductor part and hamstring part)
ADD: adducts and flexes thigh
HS: extends thigh
196
Gracilis Origin and Insertion
Origin: body and inferior ramus of pubis
Insertion: superior part of medial surface of tibia
197
Gracilis Innervation
Obturator nerve (L2-L3)
198
Gracilis Actions
adducts thigh, flexes and medially rotates leg
199
Obturator Externus Origin and Insertion
Origin: margins of obturator foramen, obturator membrane
Insertion: trochanteric fossa of femur
200
Obturator Externus Innervation
Obturator Nerve (L2-L3)
201
Obturator Externus Actions
laterally rotates thigh, stabilizes head of femur in acetabulum
202
Semitendinosus Origin and Insertion
Origin: upper medial ischial tuberosity
Insertion: superior part of medial surface of tibia
203
Semitendinosus Innervation
Tibial division of sciatic nerve (L5-S2)
204
Semitendinosus Actions
flexes leg, extends thigh
205
Semimembranosus Origin and Insertion
Origin: upper and lateral ischial tuberosity
Insertion: posterior part of medial condyle of tibia
206
Semimembranosus Innervation
Tibial division of sciatic nerve (L5-S2)
207
Semimembranosus Actions
flexes leg, extends thigh
208
Biceps Femoris Origin (long and short head) and Insertion
Origin:
Long Head: ischial tuberosity
Short Head: linea aspera and lateral supracondylar line of femur
Insertion: lateral side of head of fibula
209
Biceps Femoris Innervation (long and short head)
Long Head: sciatic nerve (tibial division) (L5-S2)
Short Head: sciatic nerve (common fibular division)
210
Biceps Femoris Actions
flexes and laterally rotates leg, extends thigh at hip
211
Tibialis Anterior Origin and Insertion
Origin: lateral condyle and proximal half of lateral tibia, interosseous membrane
Insertion: medial plantar surfaces of medial cuneiform bone and base of 1st metatarsal bone
212
Tibialis Anterior Innervation
Deep Fibular Nerve (L4-L5)
213
Tibialis Anterior Actions
dorsiflexes foot at ankle and inverts foot
214
Extensor Hallicus Longus Origin and Insertion
Origin: middle part of anterior surface of fibula and interosseous membrane
Insertion: dorsal aspect of base of distal phalanx of great toe
215
Extensor Hallicis Longus Innervation
Deep Fibular Nerve (L5-S1)
216
Extensor Hallicis Longus Actions
extends great toe, dorsiflexes foot at ankle
217
Extensor Digitorum Longus Origin and Insertion
Origin: lateral condyle of tibia, proximal 3/4s of anterior surface of interosseous membrane and fibula
Insertion: middle and distal phalangeal bones of lateral four digits
218
Extensor Digitorum Longus Innervation
Deep fibular nerve (L5-S1)
219
Extensor Digitorum Longus Actions
extends lateral 4 digits and dorsiflexes foot at ankle
220
Peroneus Longus Origin and Insertion
Origin: head and proximal 2/3s of lateral fibula
Insertion: plantar base of 1st metatarsal bone and medial cuneiform
221
Peroneus Longus Innervation
Superficial fibular nerve (L5-S2)
222
Peroneus Longus Actions
everts foot, weakly plantarflexes foot at ankle
223
Peroneus Brevis Origin and Insertion
Origin: distal 2/3s of lateral surface of fibula
Insertion: dorsal surface of tuberosity on base of 5th metatarsal bone
224
Peroneus Brevis Innervation
Superficial fibular nerve (L5-S2)
225
Peroneus Brevis Actions
everts foot and weakly plantarflexes foot at ankle
226
Gastrocnemius Origin and Insertion
Origin:
Lateral Head: lateral aspect of lateral condyle of femur
Medial Head: popliteal surface above medial condyle of femur
Insertion: posterior aspect of calcaneus via achilles tendon
227
Gastrocnemius Innervation
Tibial nerve (S1-S2)
228
Gastrocnemius Actions
plantarflexes foot at ankle joint, assists in flexion of knee joint
229
Soleus Origin and Insertion
Origin: posterior aspect of head of fibula, proximal 1/4 of posterior surface of fibula, soleal line of tibia
Insertion: posterior aspect of calcaneus via achilles tendon
230
Soleus Innervation
Tibial nerve (S1-S2)
231
Soleus Actions
plantarflexes foot at ankle, stabilizes leg over foot
232
Plantaris Origin and Insertion
Origin: inferior end of lateral supracondylar line of femur and oblique popliteal ligament
Insertion: posterior aspect of calcaneus via achilles tendon
233
Plantaris Innervation
Tibial nerve (L5-S1)
234
Plantaris Actions
weakly assists gastrocnemius
235
Popliteus Origin and Insertion
Origin: lateral aspect of condyle of femur, lateral meniscus
Insertion: posterior tibia superior to soleal line
236
Flexor Hallucis Longus Origin and Insertion
Origin: distal 2/3s of posterior fibula, inferior part of interosseous membrane
Insertion: base of distal phalanx of great toe
237
Flexor Hallucis Longus Innervation
Tibial nerve (L5-S2)
238
Flexor Hallucis Longus Actions
flexes all joints of great toe, weakly plantarflexes foot at ankle
239
Flexor Digitorum Longus Origin and Insertion
Origin: medial part of posterior tibia inferior to soleal line
Insertion: plantar bases of distal phalangeal bones of lateral 4 digits
240
Flexor Digitorum Longus Innervation
Tibial nerve (L5-S1)
241
Flexor Digitorum Longus Actions
flexes lateral 4 digits and plantarflexes foot at ankle; supports longitudinal arches of foot
242
Tibialis Posterior Origin and Insertion
Origin: posterior tibia below soleal line, interosseous membrane, proximal 1/2 of posterior fibula
Insertion: tuberosity of navicular bone, all cuneiforms, cuboid bone, and bases of 2-4 metatarsal bones
243
Tibialis Posterior Innervation
Tibial nerve (L4-L5)
244
Tibialis Posterior Actions
plantarflexes foot at ankle and inverts foot
