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Anatomy Thigh and Leg Muscles
Origins, Insertions, Actions and Innervations
129
Anatomy
Undergraduate 3
11/05/2013

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Term
Psoas Major Origin
Definition
Bodies and Transverse processes of lumbar vertebrae
Term
Psoas Major Insertion
Definition
Lesser trochanter of femur
Term
Psoas Major ACtion
Definition
Flexes THigh
Term
Psoas Major Innervation
Definition
Lumbar Ventral Rami
Term
Iliacus Origin
Definition
Iliac Fossa
Term
Iliacus Insertion
Definition
Lesser trochanter of femur
Term
Iliacus Action
Definition
Flexes thigh
Term
Iliacus Innervation
Definition
Femoral nerve
Term
Iliopsoas Muscle
Definition
inferior to inguinal ligament; the two muscles merge and share a common insertion
Term
Gluteus Maximus Origin
Definition
Posterior ilium, sacrum, sacrotuberous ligament, and coccyx
Term
Gluteus Maximus Insertion
Definition
iliotibial tract and gluteal tuberosity of femur
Term
Gluteus Maximus Action
Definition
extends thigh and assist in lateral rotation of thigh
Term
Gluteus Maximus Innervation
Definition
Inferior Gluteal Nerve
Term
Tensor Fasciae Latae Origin
Definition
Iliac crest and anterior superior iliac spine
Term
Tensor Fasciae Latae Insertion
Definition
Iliotibial tract
Term
Tensor Fasciae Latae Action
Definition
abduct and flex thigh
Term
Tensor Fasciae Latae Innervation
Definition
Superior gluteal nerve
Term
Gluteus Medius Origin
Definition
lateral surface of ilium
Term
Gluteus Medius Insertion
Definition
Lateral surface of greater trochanter
Term
Gluteus Medius Action
Definition
Abducts thigh
Term
Gluteus Medius Innervation
Definition
Superior gluteal nerve
Term
Gluteus Minimus Origin
Definition
Lateral surface of ilium inferior to medius origin
Term
Gluteus Minimus Insertion
Definition
Anterior surface of greater trochanter
Term
Gluteus Minimus ACtion
Definition
abducts and medially rotates thigh
Term
Gluteus Minimus innervation
Definition
Superior gluteal nerve
Term
Rectus femoris origin
Definition
anterior superior iliac spine
Term
Rectus femoris insertion
Definition
tibial tuberosity via patellar tendon
Term
Rectus femoris action
Definition
extend leg and flex thigh
Term
Rectus femoris innervation
Definition
femoral nerve
Term
vastus lateralis origin
Definition
lateral margin of linea aspera and greater trochanter
Term
vastus lateralis insertion
Definition
tibial tuberosity via patellar tendon
Term
vastus lateralis action
Definition
extend leg
Term
vastus lateralis innervation
Definition
Femoral nerve
Term
Vastus Intermedius Origin
Definition
Anterior and Lateral surfaces of femur
Term
Vastus Intermedius Insertion
Definition
tibial tuberosity via patellar tendon
Term
Vastus Intermedius Action
Definition
extend leg
Term
Vastus Intermedius Innervation
Definition
Femoral nerve
Term
Vastus Medialis Origin
Definition
medial margin of linea aspera
Term
Vastus Medialis Insertion
Definition
tibial tuberosity via patella tendon
Term
Vastus Medialis Action
Definition
extend leg
Term
Vastus Medialis Innervation
Definition
Femoral nerve
Term
Sartorius Origin
Definition
Anterior Superior Iliac spine
Term
Sartorius Insertion
Definition
Medial surface of proximal tibia
Term
Sartorius ACtion
Definition
flex leg and flex and laterally rotate thigh
Term
Sartorius Innervation
Definition
Femoral nerve
Term
Piriformis Origin
Definition
anterior surface of sacrum
Term
Piriformis Insertion
Definition
greater trochanter
Term
Piriformis Action
Definition
laterally rotates thigh
Term
Piriformis Innervation
Definition
Nerve to the Piriformis
Term
Semitendinosus Origin
Definition
Ischial tuberosity
Term
Semitendinosus Insertion
Definition
Medial surface of proximal tibia
Term
Semitendinosus Action
Definition
extend thigh and flexes leg
Term
Semitendinosus Innervation
Definition
Tibial nerve
Term
Semimembranosus Origin
Definition
Ischial tuberosity
Term
Semimembranosus Insertion
Definition
Posterior surface of medial condyle of tibia
Term
Semimembranosus ACtion
Definition
extend thigh and flex leg
Term
Semimembranosus Innervation
Definition
tibial nerve
Term
Biceps Femoris Origin
Definition
Long Head: Ischial tuberosity
Short Head: Linea aspera
Term
Biceps Femoris Insertion
Definition
Head of fibula
Term
Biceps Femoris Action
Definition
extend thigh and flex leg
Term
Biceps Femoris Innervation
Definition
Long Head: TIbial Nerve
Short Head: Common Fibular Nerve
Term
Pectineus Origin
Definition
Superior pubic ramus
Term
Pectineus Insertion
Definition
Posterior femur just distal to lesser trochanter
Term
Pectineus Action
Definition
adduct and flex thigh
Term
Pectineus Innervation
Definition
Obturator and Femoral nerves
Term
Adductor Longus Origin
Definition
Anterior pubis, near pubic symphysis
Term
Adductor Longus Insertion
Definition
Linea aspera
Term
Adductor Longus Action
Definition
Adducts thigh
Term
Adductor Longus Innervation
Definition
Obturator Nerve
Term
Adductor Brevis Origin
Definition
Anterior pubis and inferior pubis ramus
Term
Adductor Brevis Insertion
Definition
Linea aspera
Term
Adductor Brevis Action
Definition
adduct thigh
Term
Adductor Brevis Innervation
Definition
Obturator Nerve
Term
Gracilis Origin
Definition
Inferior Pubic ramus near symphysis
Term
Gracilis Insertion
Definition
Medial surface of proximal tibia
Term
Gracilis ACtion
Definition
adducts thigh and flexes leg
Term
Gracilis Innervation
Definition
Obturator Nerve
Term
Adductor Magnus Origin
Definition
Inferior pubic ramus, ischial ramus and ischial tuberosity
Term
Adductor Magnus Insertion
Definition
Linea aspera and adductor tubercle
Term
Adductor Magnus Action
Definition
adducts and extends thigh
Term
Adductor Magnus Innervation
Definition
Obturator and Tibial Nerves
Term
Gastrocnemius Origin
Definition
Posterior surface of lateral and medial epicondyles of femur
Term
Gastrocnemius Insertion
Definition
Posterior calcaneus via achilles tendon
Term
Gastrocnemius Action
Definition
plantar flexes foot and flexes leg
Term
Gastrocnemius Innervation
Definition
Tibial nerve
Term
Plantaris Origin
Definition
Posterior surface of femur proximal to lateral epicondyle
Term
Plantaris Insertion
Definition
Posterior calcaneus via achilles tendon
Term
Plantaris ACtion
Definition
plantar flexes foot and flexes leg
Term
Plantaris Innervation
Definition
Tibial Nerve
Term
Soleus Origin
Definition
Posterior surface of proximal tibia and fibula
Term
Plantaris Insertion
Definition
Posterior calcaneus via achilles tendon
Term
Plantaris ACtion
Definition
Plantar flexes foot
Term
Tibial Nerve Innervation
Definition
Tibial nerve
Term
Flexor Hallucis Longus Origin
Definition
Posterior surface of distal fibula
Term
Flexor Hallucis Longus Insertion
Definition
Distal phalanx of big toe
Term
Flexor Hallucis Longus ACtion
Definition
Flexes big toe and plantar flexes foot
Term
Flexor Hallucis Longus Innervation
Definition
Tibial Nerve
Term
Flexor digitorum longus Origin
Definition
Posterior surface of middle tibia
Term
Flexor digitorum longus Insertion
Definition
Distal phalanges of toes 2-5
Term
Flexor digitorum longus Action
Definition
Flex toes 2-5 and plantar flex foot
Term
Flexor digitorum longus Innervation
Definition
Tibial nerve
Term
Tibialis Posterior Origin
Definition
Posterior surface of tibia, fibula and interosseus membrane
Term
Tibialis Posterior Insertion
Definition
Navicular, cuneiforms and metatarsals 2-4
Term
Tibialis Posterior ACtion
Definition
Plantar flexes foot and inverts foot
Term
Tibialis Posterior Innervation
Definition
Tibial Nerve
Term
Fibularis Longus Origin
Definition
Lateral surface of proximal fibula
Term
Fibularis Longus Insertion
Definition
Metatarsal 1 and medial cuneiform
Term
Fibularis Longus Action
Definition
Everts and plantar flexes foot
Term
Fibularis Longus Innervation
Definition
Common Fibular nerve
Term
Fibularis Brevis Origin
Definition
Lateral surface of distal fibula
Term
Fibularis Brevis Insertion
Definition
Dorsal surface of metatarsal 5
Term
Fibularis Brevis Action
Definition
everts and plantar flexes foot
Term
Fibularis Brevis Innervation
Definition
Common Fibular Nerve
Term
Tibialis Anterior Origin
Definition
Lateral surface of proximal tibia
Term
Tibialis Anterior Insertion
Definition
Metatarsal 1 and medial cuneiform
Term
Tibialis Anterior ACtion
Definition
dorsiflexes and inverts foot
Term
Tibialis Anterior Innervation
Definition
Common Fibular nerve
Term
Extensor Hallucis Longus Origin
Definition
Anterior surface of middle fibula and interosseus membrane
Term
Extensor Hallucis Longus Insertion
Definition
Distal phalanx of big toe
Term
Extensor Hallucis Longus Action
Definition
extend big toe and dorsiflex foot
Term
Extensor Hallucis Longus Innervation
Definition
Common Fibular nerve
Term
Extensor Digitorum Longus Origin
Definition
Anterior surface of proximal fibula and interosseus membrane
Term
Extensor Digitorum Longus Insertion
Definition
Distal phalanges of toes 2-5
Term
Extensor Digitorum Longus Action
Definition
Extend toes 2-5 and Dorsiflex foot
Term
Extensor Digitorum Longus Innervation
Definition
Common Fibular Nerve
Term
Fibularis Tertius Origin
Definition
Anterior surface of distal fibula
Term
Fibularis Tertius Insertion
Definition
Dorsal surface of metatarsal 5
Term
Fibularis Tertius Action
Definition
Dorsiflex and evert foot
Term
Fibularis Tertius Innervation
Definition
Common Fibular nerve
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