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OMM 2nd Written Exam - Muscle Groups
Origin, Insertion, Action, Innervation
148
Medical
Professional
11/07/2011

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Term
Origin of Quadratus Lumborum
Definition
Iliac Crest
Term
Insertion of Quadratus Lumborum
Definition
12th rib, transverse process of L1-L4
Term
Action of Quadratus Lumborum
Definition
Side Bending
Term
Innervation of Quadratus Lumborum
Definition
Subcostal Nerve
Term
Origin of Latissimus Dorsi
Definition
spinous processes of T7-T12, thoracolumbar fascia of the spinous processes of all lumbar vertebra and the sacrum, posterior third of the iliac crest, 9th - 12th ribs, inferior angle of the scapula
Term
Insertion of Latissimus Dorsi
Definition
Lesser tuberosity of the humerus
Term
Action of Latissimus Dorsi
Definition
Internal rotation & adduction at the shoulder, respiration (expiration, cough muscle)
Term
Innervation of Latissimus Dorsi
Definition
Thoracodorsal nerve
Term
Origin of Psoas
Definition
Major- lateral surface of T12-L4 vertebral bodies and IVDs
Minor- transverse processes of L1-L5
Term
Insertion of Psoas
Definition
lesser trochanter of the femur
Term
Action of Psoas
Definition
Hip joint- flexion and external rotation
Lumbar- unilateral contraction- bends
trunk laterally to that side, b/l contraction- raise the trunk from the supine position
Term
Innervation of Psoas
Definition
Lumbar Plexus (L1-3)
Term
Origin of Iliacus
Definition
Iliac Fossa
Term
Insertion of Iliacus
Definition
lesser trochanter of the femur
Term
Action of Iliacus
Definition
Hip joint- flexion and external rotation
Lumbar- unilateral contraction- bends
trunk laterally to that side, b/l contraction- raise the trunk from the supine position
Term
Innervation of Iliacus
Definition
Femoral Nerve
Term
Origin of Gluteus maximus
Definition
lateral dorsal surface of the sacrum, posterior gluteal surface of the ilium, thoracolumbar fascia, & sacrotuberous ligament
Term
Insertion of Gluteus maximus
Definition
iliotibial tract & gluteal tuberosity
Term
Action of Gluteus maximus
Definition
Whole muscle - extends and externally rotates the hip
upper fibers- abduction
lower fibers- adduction
Term
Innervation of Gluteus maximus
Definition
Inferior gluteal nerve
Term
Origin of Gluteus medius
Definition
gluteal surface of the ilium
Term
Insertion of Gluteus medius
Definition
lateral surface of the greater trochanter
Term
Action of Gluteus medius
Definition
entire muscle- abducts the hip
anterior part- flexion & internal rotation
posterior part- extension & external rotation
Term
Innervation of Gluteus medius
Definition
Superior gluteal nerve
Term
Origin of Gluteus minimus
Definition
gluteal surface of the ilium
Term
Insertion of Gluteus minimus
Definition
anterolateral surface of the greater trochanter
Term
Action of Gluteus minimus
Definition
entire muscle- abducts the hip
anterior part- flexion & internal rotation
posterior part- extension & external rotation
Term
Innervation of Gluteus minimus
Definition
Superior Gluteal Nerve
Term
Origin of Tensor fasciae latae
Definition
ASIS
Term
Insertion of Tensor fasciae latae
Definition
Iliotibial tract
Term
Action of Tensor fasciae latae
Definition
Tenses the fascia lata
hip joint- abduction, flexion, & internal rotation
Term
Innervation of Tensor fasciae latae
Definition
Superior Gluteal nerve
Term
Origin of Piriformis
Definition
pelvic surface of the sacrum
Term
Insertion of Piriformis
Definition
apex of greater trochanter
Term
Action of Piriformis
Definition
external rotation, abduction, & extension of the hip
Term
Innervation of Piriformis
Definition
sacral plexus (L5-S2)
Term
Origin of Obturator internus
Definition
Inner surface of obturator membrane
Term
Insertion of Obturator internus
Definition
medial surface of greater trochanter
Term
Action of Obturator internus
Definition
external rotation, adduction, & extension of hip
Term
Innervation of Obturator internus
Definition
sacral plexus (L5, S1)
Term
Origin of Gemelli
Definition
gemellus superior- ischial spine
gemellus inferior- ischial tuberosity
Term
Insertion of Gemelli
Definition
jointly with obturator internus tendon to medial surface of greater trochanter
Term
Action of Gemelli
Definition
external rotation, adduction, & extension of hip
Term
Innervation of Gemelli
Definition
sacral plexus (L5, S1)
Term
Origin of Quadratus femoris
Definition
lateral border of ischial tuberosity
Term
Insertion of Quadratus femoris
Definition
intertrochanteric crest of the femur
Term
Action of Quadratus femoris
Definition
External rotation and adduction of the hip
Term
Innervation of Quadratus femoris
Definition
sacral plexus (L5, S1)
Term
Origin of Obturator Externus
Definition
Outer surface of obturator membrane
Term
Insertion of Obturator Externus
Definition
Trochanteric fossa of the femur
Term
Action of Obturator Externus
Definition
adduction & external rotation of the hip
Term
Innervation of Obturator Externus
Definition
Obturator nerve
Term
Origin of Pectineus
Definition
Pecten pubis
Term
Insertion of Pectineus
Definition
pectineal line & proximal linea aspera of femur
Term
Action of Pectineus
Definition
Adduction, external rotation, and slight flexion of the hip
Term
Innervation of Pectineus
Definition
Obturator nerve, Femoral Nerve
Term
Origin of Adductor Longus
Definition
superior pubic ramus and anterior side of the symphysis
Term
Insertion of Adductor Longus
Definition
linea aspera
Term
Action of Adductor Longus
Definition
Adduction & flexion (extension of hip past 80 degrees of flexion)
Term
Innervation of Adductor Longus
Definition
Obturator nerve
Term
Origin of Adductor Brevis
Definition
Inferior pubic ramus
Term
Insertion of Adductor Brevis
Definition
Linea aspera
Term
Action of Adductor Brevis
Definition
Adduction & flexion (extension of hip past 80 degrees of flexion)
Term
Innervation of Adductor Brevis
Definition
Obturator nerve
Term
Origin of Adductor Magnus
Definition
inferior pubic ramus, ischial ramus, and ischial tuberosity
Term
Insertion of Adductor Magnus
Definition
deep part- medial tip of linea aspera
superficial part- medial epicondyle of the femur
Term
Action of Adductor Magnus
Definition
adduction, external rotation, extension of the hip
Term
Innervation of Adductor Magnus
Definition
Obturator nerve, Tibial Nerve
Term
Origin of Adductor Minimus
Definition
inferior pubic ramus
Term
Insertion of Adductor Minimus
Definition
linea aspera
Term
Action of Adductor Minimus
Definition
Adduction, external rotation, and slight flexion of the hip joint
Term
Innervation of Adductor Minimus
Definition
Obturator nerve
Term
Origin of Gracilis
Definition
Inferior pubic ramus below symphysis
Term
Insertion of Gracilis
Definition
Medial border of tibial tuberosity
Term
Action of Gracilis
Definition
Hip: Adduction and Flexion
Knee: Flexion and internal rotation
Term
Innervation of Gracilis
Definition
Obturator nerve
Term
Origin of Sartorius
Definition
ASIS
Term
Insertion of Sartorius
Definition
Medial to tibial tuberosity
Term
Action of Sartorius
Definition
hip- flexion, abduction, and external rotation
Knee - Flexion and internal rotation
Term
Innervation of Sartorius
Definition
Femoral Nerve
Term
Origin of Quadriceps Femoris
Definition
Rectus femoris- AIIS
Vastus medialis- linea aspera, distal part of intertrochanteric
line
Vastus lateralis- linea aspera, lateral surface of the greater trochanter
Vastus intermedialis- anterior femoral shaft, articularis genus- anterior femoral shaft
Term
Insertion of Quadriceps Femoris
Definition
tibial tuebrosity via the patellar ligament
Term
Action of Quadriceps Femoris
Definition

hip flexion

knee extension

Term
Innervation of Quadriceps Femoris
Definition
Femoral Nerve
Term
Origin of Biceps Femoris
Definition
long head- ischial tuberosity, sacrotuberous ligament
short head- linea aspera
Term
Insertion of Biceps Femoris
Definition
Head of fibula
Term
Action of Biceps Femoris
Definition

Extension of the hip

Flexion and external rotation of knee

Term
Innervation of Biceps Femoris
Definition
Common fibular nerve
Term
Origin of Semimembranosus
Definition
Ischial tuberosity
Term
Insertion of Semimembranosus
Definition
Medial tibial condyle, oblique popliteal ligament, popliteus fascia
Term
Action of Semimembranosus
Definition

Extension of the hip

Flexion and internal rotation of knee

Term
Innervation of Semimembranosus
Definition
Tibial nerve
Term
Origin of Semitendinosus
Definition
Ishcial tuberosity and sacrotuberus ligament
Term
Insertion of Semitendinosus
Definition
medial to tibial tuberosity in the pes anserine
Term
Action of Semitendinosus
Definition

Extension of the hip

Flexion and internal rotation of knee

Term
Innervation of Semitendinosus
Definition
Tibial nerve
Term
Origin of Tibialis Anterior
Definition
Upper lateral surface of tibia and interosseous membrane
Term
Insertion of Tibialis Anterior
Definition

Medial and plantar surface of cuneiform

Medial base of first metatarsal

Term
Action of Tibialis Anterior
Definition
Dorsiflexion and inversion
Term
Innervation of Tibialis Anterior
Definition
Deep fibular nerve
Term
Origin of Extensor digitorum longus
Definition
Lateral tibia condyle, fibular head, anterior fibula, interrosseaous membrane
Term
Insertion of Extensor digitorum longus
Definition
Dorsal aponeuroses and distal phalanges of 2nd-5th toes
Term
Action of Extensor digitorum longus
Definition
dorsiflex, eversion
Term
Innervation of Extensor digitorum longus
Definition
deep fibular nerve
Term
Origin of Extensor hallucis longus
Definition
Medial fibula, interosseous membrane
Term
Insertion of Extensor hallucis longus
Definition
Dorsal aponeurosis and distal phalanx of big toe
Term
Action of Extensor hallucis longus
Definition
Dorsiflex, eversion, inversion, extend big toe
Term
Innervation of Extensor hallucis longus
Definition
deep fibular nerve
Term
Origin of Fibularis longus
Definition
head of fibula
Term
Insertion of Fibularis longus
Definition
plantar side of cuneiform, base of 1st metatarsal
Term
Action of Fibularis longus
Definition
Plantar flexion, eversion, support arch of foot
Term
Innervation of Fibularis longus
Definition
Superficial fibular nerve
Term
Origin of Fibularis brevis
Definition
Distal fibula
Term
Insertion of Fibularis brevis
Definition
Tuberosity of 5th metatarsal
Term
Action of Fibularis brevis
Definition
Plantar flexion, eversion
Term
Innervation of Fibularis brevis
Definition
Superficial fibular nerve
Term
Origin of Fibularis tertius
Definition
Distal fibula
Term
Insertion of Fibularis tertius
Definition
Base of 5th metatarsal
Term
Action of Fibularis tertius
Definition
Dorsiflexion, Eversion
Term
Innervation of Fibularis tertius
Definition
Deep fibular nerve
Term
Origin of Gastrocnemius
Definition
Medial and Lateral epicodyle of femur
Term
Insertion of Gastrocnemius
Definition
Achilles tendon
Term
Action of Gastrocnemius
Definition
Plantar flexion, Inversion, Knee flexion
Term
Innervation of Gastrocnemius
Definition
Tibial Nerve
Term
Origin of Soleus
Definition

Posterior head and neck of fibula

Soleal line on posterior tibia

Term
Insertion of Soleus
Definition
Achilles tendon
Term
Action of Soleus
Definition
Plantar flexion, Inversion, Knee flexion
Term
Innervation of Soleus
Definition
Tibial Nerve
Term
Origin of Plantaris
Definition
Proximal lateral head of gastroc.
Term
Insertion of Plantaris
Definition
Achilles tendon
Term
Action of Plantaris
Definition
Prevent compression of posterior leg muscles during knee flexion
Term
Innervation of Plantaris
Definition
Tibial nerve
Term
Origin of Popliteus
Definition
Lateral femoral condyle
Term
Insertion of Popliteus
Definition
Posterior tibial surface
Term
Action of Popliteus
Definition

Flexion and internal rotation of knee

Stabilize knee

Term
Innervation of Popliteus
Definition
Tibial nerve
Term
Origin of Tibialis posterior
Definition
Posterior part of interosseous membrane
Term
Insertion of Tibialis posterior
Definition
Navicular, cuneiforms, 2nd-4th metatarsal bases
Term
Action of Tibialis posterior
Definition
Plantar flexion, inversion, support arch of foot
Term
Innervation of Tibialis posterior
Definition
Tibial nerve
Term
Origin of Flexor digitorum longus
Definition
Posterior Middle Tibia
Term
Insertion of Flexor digitorum longus
Definition
Bases of 2nd-5th distal phalanges
Term
Action of Flexor digitorum longus
Definition
Plantar flexion, inversion, support arch of foot
Term
Innervation of Flexor digitorum longus
Definition
Tibial nerve
Term
Origin of Flexor hallucis longus
Definition
Posterior distal fibula
Term
Insertion of Flexor hallucis longus
Definition
Distal phalanx of big toe
Term
Action of Flexor hallucis longus
Definition
Plantar flexion, inversion, support arch of foot
Term
Innervation of Flexor hallucis longus
Definition
Tibial nerve
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