Anatomy Lower Extremity Muscles

Front 1

Psoas major
(iliac region)

Back 1

o: bodies of vertebrae and intervertebral disks from 12th thoracic to 5th lumbar vertebrae
i: lesser trochanter of femur
n: lumbar plexus

Front 2

Iliacus
(iliac region)

Back 2

o: iliac fossa of ilium
i: lesser trochanter of femur
n: femoral nerve

Front 3

Psoas minor
(iliac region)

Back 3

o: bodies of 12th thoracic and 1st lumbar vertebrae and intervertebral disk between them
i: iliopectineal eminence and pectineal line of pubis
n:branch of spinal nerve L1

Front 4

Gluteus maximus
(gluteal region)

Back 4

o: ilium behind posterior gluteal line, sacrum and coccyx, sacrotuberous ligament
i:iliotibial tract of fascia lata and gluteal tuerosity of femur
n: inferior gluteal nerve

Front 5

Gluteus medius
(gluteal region)

Back 5

o: ilium between anterior and posterior gluteal lines
i:outer surface of greater trochanter of femur
n: superior gluteal nerve

Front 6

Gluteus minimus
(gluteal region)

Back 6

o: ilium between anterior and inferior gluteal lines
i: anterior surface of greater trochanter of femur
n: superior gluteal nerves

Front 7

Tensor fascia lata
(gluteal region)

Back 7

o: anterior superior iliac spine of ilium
i: iliotibial tract
n: superior gluteal nerves

Front 8

Gemellus superior (girls)
(gluteal region)

Back 8

o: ischial spine of ischium
i: trochanteric fossa of the femur
n: nerve to the obturator internus muscle

Front 9

Gemellus inferior (get)
(gluteal region)

Back 9

o: ischial tuberosity of the ischium
i: trochanteric fossa of femur
n: nerve to quadratus femoris muscle

Front 10

Obturator internus (often)
(gluteal region)

Back 10

o: pelvic surface of obtruator membrane and surrounding bone
i: trochanteric fossa of femur
n: nerve to obturator internus muscle

Front 11

Obturator externus (obnoxious)
(gluteal region)

Back 11

o: outer surface of obtruator membrane and form bone around obturator foramen
i: trochanteric fossa of femur
n: obturator nerve

Front 12

Piriformis (pretty)
(gluteal region)

Back 12

o: anterior (pelvic) surface of sacrum
i: greater trochanter of femur
n: piriformis branch of sacral plexus

Front 13

Quadratus femoris (questions)
(gluteal region)

Back 13

o: ischial tuberosity of ischium
i: intertrochanteric crest of femur
n: nerve to quadratus femoris muscle

Front 14

Sartorius

Back 14

anterior superior Iliac spine of ilium
medial surface of upper tibia
femoral nerve

Front 15

Rectus femoris

Back 15

anterior inferior iliac spine
tibial tuberosity via patellar tendon
femoral nerve

Front 16

Vastus lateralis

Back 16

o: greater trochanter, upper 1/2 of lateral lip of linea aspera
i: tibial tuberosity via patellar tendon
n: femoral nerve

Front 17

Vastus medialis

Back 17

o: lower part of intertrochanteric line, spiral line, entire length of medial lip of linea aspera
i: tibial tuberosity via patellar tendon
n: femoral nerve

Front 18

Vastus intermedius

Back 18

o: front and lateral surfaces of upper 2/3 of femoral shaft
i: tibial tuberosity via patellar tendon
n: femoral nerve

Front 19

Gracilius

Back 19

o: body and inferior ramus of pubis
i: tibial shaft below medial condyle
n: obturator nerve

Front 20

Pectineus

Back 20

o: pectineal line of pubis and region of pubis anterior to line
i: pectineal line of femur
n: obturator nerve and femoral nerve

Front 21

Adductor longus

Back 21

o: crest and symphysis of pubis
i: middle 1/3 of medial lip of linea aspera of femur
n: obturator nerve

Front 22

Adductor brevis

Back 22

o: inferior ramus of pubis
i: upper 1/3 of medial lip of linea aspera of femur
n: obturator nerve

Front 23

Adductor magnus: adductor

Back 23

o: body and inferior ramus of pubis, ramus of ischium
i: entire length of medial lip of linea aspera
n: obturator nerve

Front 24

Adductor magnus: extensor

Back 24

o: ischial tuberosity and ischial ramus
i: adductor tubercle of femur
n: tibial nerve

Front 25

Semimembranosus

Back 25

o: ischial tuberosity
i: medial condyle of tibia
n: tibial nerve

Front 26

Semitendinosus

Back 26

o: ischial tuberosity
i: medial surface of proximal tibia
n: tibial nerve

Front 27

Biceps femoris: long head

Back 27

o: ischial tuberosity
i: head of fibula, lateral condyle of tibia
n: tibial nerve

Front 28

Biceps femoris: short head

Back 28

o: lateral lip of linea aspera of femur, lower 1/2
i: head of fibula, lateral condyle of tibia
n: common peroneal nerve

Front 29

Gastrocnemius: medial head

Back 29

o: popliteal surface, medial condyle of femur
i: achilles' tendon into lower 1/2 of posterior surface of calcaneous
n: tibial nerve

Front 30

Gastrocnemius: lateral head

Back 30

o: lateral condyle of femur
i: achilles' tendon into lower 1/2 of posterior surface of calcaneus
n: tibial nerve

Front 31

Soleus

Back 31

o: upper 1/4 of fibula, soleal line
i: achilles' tendon into lower 1/2 of posterior surface of calcaneus
n: tibial nerve

Front 32

Plantaris

Back 32

o: lateral supracondylar line of femur
i: achilles' tendon
n: tibial nerve

Front 33

Tibialis posterior

Back 33

o: lower posterior fibular and tibial shafts and lower posterior interosseous membrane
i: navicular tuberosity; bases of metatarsals 2, 3, 4; all tarsals except talus and calcaneus
n: tibial nerve

Front 34

Flexor digitorum longus

Back 34

o: middle 1/3 of tibia below soleal line
i: base of distal phalanges 2-5
n: tibial nerve

Front 35

Flexor hallucis longus

Back 35

o: lower 2/3 of posterior fibula and lower poster interosseous membrane
i: base of distal phalanx of great toe
n: tibial nerve

Front 36

Popliteus

Back 36

o: anterior end of popliteal groove of lateral epicondyle of femur
i: area of posterior tibia above soleal line
n: tibial nerve

Front 37

Extensor digitorum brevis

Back 37

o: calcaneus
i: tendons of extensor digitorum longus to toes 2, 3, 4
n: deep peroneal

Front 38

Extensor hallucis brevis

Back 38

o: calcaneus
i: base of distal phalanx of great toe
n: deep peroneal

Front 39

Abductor hallucis

Back 39

o: medial process of calcaneal tuberosity
i: medial side of proximal phalanx of great toe
n: medial plantar nerve

Front 40

Abductor digiti minimi

Back 40

o: medial and lateral processes of calcaneal tuberosity
i: base of proximal phalanx of toe #5
n: lateral plantar nerve

Front 41

Flexor digitorum brevis

Back 41

o: medial process of calcaneal tuberosity
i: middle phalanx of toes #2-5
n: medial plantar nerve

Front 42

dorsal interossei

Back 42

o: adjacent sides of metarsals #? and #?
i: for 2-4, fibular side of base of proximal phalanx of #?; for 1, tibial side of base of proximal phalanx
n: lateral plantar nerve

Front 43

Plantar interossei

Back 43

o: tibial side of base and body of metatarsal #?
i: tibial side of base of proximal phalanx #?
n: lateral plantar nerve