Muscles - Lower Region

23 terms by smstanle 

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Leg and foot: Origin, insertion and action (multiple attachments may not be listed)

Gluteus Maximus

O: Coccyx, posterior iliac crest, edge of sacrum
I: Gluteal tuberosity
A: Extend, laterally rotate, abduct/adduct hip

Gluteus Medius

O: Gluteal surface of ilium
I: Greater trochanter
A: Abduct, flex/extend, medially/laterally rotate hip

Gluteus Minimus

O: Gluteal surface of ilium
I: Anterior border of greater trochanter
A: Abduct, medially rotate, flex hip

Gracilis

O: proximal medial shaft of tibia
I: Inferior ramus of pubis, ramus of ischium
A: Adduct, medially rotate hip; flex, medially rotate knee

Adductor Longus

O: Public tubercle
I: Medial lip of linea aspera
A: Adduct, medially rotate, assist to flex hip

Pectineus

O: Superior ramus of pubis
I: Pectineal line of femus
A: Adduct, medially rotate, assist to flex hip

Adductor Magnus

O: Inferior ramus of pubis, ramus of ischium, ischial tuberosity
I: Adductor tubercle, medial lip of linea aspera
A: Adduct, medially rotate, extend, assist to flex hip

Tensor Fascia Latae

O: Iliac crest posterior to ASIS
I: Iliotibial tract
A: Flex, medially rotate, abduct hip

Sartorius

O: ASIS
I: Proximal, medial shaft of tibia
A: Flex, laterally rotate, abduct hip; flex, medially rotate knee

Rectus Femoris

O: AIIS
I: Tibial tuberosity
A: Extend knee, flex hip

Vastus Medialis

O: Medial lip of linea aspera
I: Tibial tuberosity
A: Extend knee

Vastus Lateralis

O: Lateral lip of linea aspera, gluteal tuberosity
I: Tibial tuberosity
A: Extend knee

Biceps Femoris

O: Ischial tuberosity, lateral lip of linea aspera
I: Head of fibula
A: Flex, laterally rotate knee; extend, laterally rotate hip; tilt pelvis posteriorly

Semimembranous

O: Ischial tuberosity
I: Posterior aspect of medial condyle of tibia
A: Flex, medially rotate knee; extend, medially rotate hip; tilt pelvis posteriorly

Semitendinosus

O: Ischial tuberosity
I: Proximal, medial shaft of the tibia
A: Flex, medially rotate knee; extend, medially rotate hip; tilt pelvis posteriorly

Gastronemius

O: Condyles of femur,posterior surfaces
I: Calcaneus
A: Flex knee, plantar flex ankle

Soleus

O: Soleal line, posterior surface of tibia, proximal posterior surface of fibula
I: Calcaneus
A: Plantar flex ankle

Peroneus Longus

O: Proximal 2/3 of lateral fibula
I: Base of 1st metatarsal and medial cuniform
A: Evert foot, assist in plantar flexion of ankle

Peroneus Brevis

O: Distal 2/3 of lateral fibula
I: Tuberosity of 5th metatarsal
A: Evert foot, assist to plantar flex ankle

Extensor Digitorum Brevis

O: Calcaneus
I: Middle phalanges of 2-5 toes
A: flex toes 2-5

Abductor Hallicus

O:Calcaneus
I: Proximal phalanges of 1st toe, medial sesamoid bone
A: Abduct 1st to, assist to flex first toe

Abductor Digiti Minimi

O: Calcaneus
I: Proximal phalanges of 5th toe
A: flex and assist to abduct 5th toe

Flexor Digitorum Brevis

O: Calcaneus
I: 2nd to 4th toes via extensor digitorum longus tendons
A: Extend toes 2-4

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