Muscles Part 9

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created 4 years ago by Rae_Harrison
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Muscles of Lower Limb (Including Pelvis)
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1
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Give the origin, insertion, and action of the gluteus maximus

O: Iliac crest, lateral surface of the ilium; sacrum, coccyx

I: Iliotibial tract and gluteal tuberosity of femur

A: Extension and lateral rotation at hip

2
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Give the origin, insertion, and action of the gluteus medius and minimus

O: Anterior iliac crest of ilium/lateral surface of ilium

I: Greater trochanter of femur

A: Abduction and medial rotation at hip

3
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Give the origin, insertion, and action of the tensor fascia latae

O: Iliac crest and lateral surface of anterior superior iliac spine

I: Iliotibial tract

A: Flexion and medial rotation at hip; laterally supports the knee (fascia lata)

4
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Give the origin, insertion, and action of the Iliacus (iliopsoas group)

O: Iliac fossa of ilium

I: Femur distal to lesser trochanter

A: Flexion at hip

5
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Give the origin, insertion, and action of the psoas major (iliopsoas group)

O: Anterior surfaces and transverse processes of vertebrae (T12-L5)

I: Lesser trochanter in company with iliacus

A: Flexion at hip or lumbar intervertebral joints

6
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Give the origin, insertion, and action of the sartorius

O: Anterior superior iliac spine

I: Medial surface of tibia near tibial tuberosity

A: Flexion at knee; flexion and lateral rotation at hip

7
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Give the origin, insertion, and action of the adductors

O: Inferior ramus of pubis

I: Linea aspera of femur

A: Adduction at hip

8
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Give the origin, insertion, and action of the rectus femoris

O: Anterior inferior iliac spine and superior acetabular rim of ilium

I: Tibial tuberosity via patellar ligament

A: Extension at knee; flexion at hip

9
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Give the origin, insertion, and action of the vastus medialis

O: Entire length of linea aspera of femur

I: Tibial tuberosity via patellar ligament

A: Extension at knee

10
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Give the origin, insertion, and action of the vastus intermedius

O: Anterolateral surface of femur and line aspera

I: Tibial tuberosity via patellar ligaments

A: Extension at knee

11
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Give the origin, insertion, and action of the vastus lateralis

O: Anterior and inferior to greater trochanter of femur and along linea aspera (proximal half)

I: Tibial tuberosity via patellar ligament

A: Extension at knee

12
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Give the origin, insertion, and action of the gracilis

O: Inferior ramus of pubis

I: Medial surface of tibia inferior to medial condyle

A: Flexion at knee; adduction and medial rotation at hip

13
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Give the origin, insertion, and action of the biceps femoris

O: Ischial tuberosity and linea aspera of femur

I: Head of fibula, lateral condyle of tibia

A: Flexion at knee; extension and lateral rotation at hip

14
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Give the origin, insertion, and action of the semimembranosus

O: Ischial tuberosity

I: Posterior surface of medial condyle of tibia

A: Flexion at knee; extension and medial rotation at hip

15
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Give the origin, insertion, and action of the semitendinosis

O: Ischial tuberosity

I: Proximal, medial surface of tibia near insertion of gracilis

A: Flexion at knee; extension and medial rotation at hip

16
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Give the origin, insertion, and action of the gastrocnemius

O: Femoral condyles

I: Calcaneous via calcaneal tendon

A: Extension (plantar flexion) at ankle; inversion of foot; flexion at knee

17
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Give the origin, insertion, and action of the soleus

O: Head and proximal shaft of fibula and adjacent posteromedial shaft of tibia

I: Calcaneous via calcaneal tendon (with gastrocnemius)

A: Extension (plantar flexion) at ankle

18
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Give the origin, insertion, and action of the fibularis brevis

O: Midlateral margin of fibula

I: Base of fifth metatarsal bone

A: Eversion of foot and extension (plantar flexion) at ankle; supports longitudinal arch

19
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Give the origin, insertion, and action of the fibularis longus

O: Lateral condyle of tibia, head and proximal shaft of fibula

I: Base of fifth metatarsal bone and medial uniform bone

A: Eversion of foot and extension (plantar flexion) at ankle; supports longitudinal arch

20
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Give the origin, insertion, and action of the popliteus

O: Lateral condyle of femur

I: Posterior surface of proximal tibial shaft

A: Medial rotation of tibia (or lateral rotation of femur); flexion at knee

21
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Give the origin, insertion, and action of the tibialis anterior

O: Lateral condyle and proximal shaft of tibia

I: Base of first metatarsal bone and medial uniform bone

A: Flexion at ankle; inversion of foot

22
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Give the origin, insertion, and action of the tibialis posterior

O: Interosseous membrane and adjacent shafts of tibia and fibula

I: Tarsal and metatarsal bones

A: Adduction and inversion of foot; extension (plantar flexion) at ankle

23
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Give the origin, insertion, and action of the extensor digitorus

O: Anterior surface of fibula

I: Superior surface, distal phalanx of great toe

A: Extension at joints of great toe