11/11/2012
Muscles Moving Thigh - Anterior
Muscles of the Lower Limb
Iliacus (part of iliopsoas)
ORIGIN:
Iliac fossa (ilium);
crest of os coxa;
ala (sacrum)
INSERTION:
lesser trochanter (femur)
INNERVATION:
femoral nerve
ACTION:
flexes thigh
(Anterior view)
Muscles Moving Thigh - Anterior
Psoas major
Muscles Moving Thigh - Anterior
Tensor fasciae latae
(part of iliopsoas)
ORIGIN:
ORIGIN:
T12 – L5 vertebrae
iliac crest (ilium); anterior superior
iliac spine (ilium)
INSERTION:
INSERTION:
lesser trochanter (femur)
iliotibial tract (connective tissue)
INNERVATION:
INNERVATION:
--------------
gluteal nerves
ACTION:
ACTION:
flexes thigh
flexes / abducts thigh
(Anterior view)
(Lateral view)
Muscles Moving Thigh - Anterior
Muscles Moving Thigh - Anterior
Sartorius
Pectineus
ORIGIN:
ORIGIN:
anterior superior iliac
spine (ilium)
pubis
INSERTION:
lesser trochanter (femur)
INSERTION:
medial surface of proximal tibia
INNERVATION:
INNERVATION:
obturator nerve
femoral nerve
ACTION:
ACTION:
adducts / flexes / medially
rotates thigh
flexes / abducts / laterally
rotates thigh
(Anterior view)
(Anterior view)
1
11/11/2012
Muscles Moving Thigh - Anterior
Muscles Moving Thigh - Anterior
Adductor brevis (part of adductors)
ORIGIN:
Adductor longus
(part of adductors)
ORIGIN:
pubis
pubis
INSERTION:
INSERTION:
linea aspera (femur)
linea aspera (femur)
INNERVATION:
INNERVATION:
obturator nerve
obturator nerve
ACTION:
ACTION:
adducts / flexes / medially
rotates thigh
adducts / flexes / medially
rotates thigh
(Anterior view)
(Anterior view)
Muscles Moving Thigh - Anterior
Adductor magnus
Muscles Moving Thigh - Anterior
Gracilis
(part of adductors)
ORIGIN:
ORIGIN:
pubis / ischium
pubis / ischium
INSERTION:
INSERTION:
linea aspera (femur)
medial surface of proximal tibia
INNERVATION:
INNERVATION:
obturator nerve / sciatic nerve
obturator nerve
ACTION:
ACTION:
adducts / flexes / medially
rotates thigh
adducts / flexes / medially
rotates thigh
(Anterior view)
(Medial view)
Muscles Moving Thigh - Posterior
Muscles Moving Thigh - Posterior
Gluteus maximus
Gluteus medius
ORIGIN:
ORIGIN:
ilium / sacrum / coccyx
lateral surface of ilium
INSERTION:
INSERTION:
greater trochanter (femur)
iliotibial tract (connective tissue);
gluteal tuberosity (femur)
INNERVATION:
INNERVATION:
gluteal nerves
gluteal nerves
ACTION:
ACTION:
abducts / medially rotates thigh
extends thigh
(Posterior view)
(Posterior view)
2
11/11/2012
Muscles Moving Thigh - Posterior
Muscles Moving Thigh - Posterior
Gluteus minimus
Piriformis
ORIGIN:
ORIGIN:
lateral surface of ilium
anterolateral surface of sacrum
INSERTION:
greater trochanter (femur)
INSERTION:
greater trochanter (femur)
INNERVATION:
INNERVATION:
gluteal nerves
--------------
ACTION:
ACTION:
abducts / medially rotates thigh
laterally rotates thigh
(Posterior view)
(Posterior view)
Muscles Moving Thigh - Posterior
Muscles Moving Thigh - Posterior
Obturator (externus / internus)
Gemellus (superior / inferior)
ORIGIN:
ORIGIN:
pubis / ischium
ischial spine (ischium);
ischial tuberosity (ischium)
INSERTION:
greater trochanter (femur)
Externus
INSERTION:
greater trochanter (femur)
Superior
INNERVATION:
INNERVATION:
--------------
-------------ACTION:
ACTION:
laterally rotates thigh
laterally rotates thigh
Internus
Inferior
(Posterior view)
(Posterior view)
Muscles Moving Thigh - Posterior
Muscles Moving (Lower) Leg - Anterior
Quadratus femoris
Rectus femoris (part of quadriceps)
ORIGIN:
ischial tuberosity (ischium)
ORIGIN:
anterior inferior iliac spine (ilium);
margin of acetabulum (os coxa)
INSERTION:
proximal end of femur
INSERTION:
tibial tuberosity (tibia)
INNERVATION:
--------------
INNERVATION:
femoral nerve
ACTION:
laterally rotates thigh
ACTION:
extends (lower) leg
(Posterior view)
(Anterior view)
3
11/11/2012
Muscles Moving (Lower) Leg - Anterior
Vastus lateralis
Muscles Moving (Lower) Leg - Anterior
(part of quadriceps)
Vastus medialis
ORIGIN:
ORIGIN:
greater trochanter (femur);
linea aspera (femur)
anterior / lateral surface
of proximal femur
INSERTION:
tibial tuberosity (tibia)
INSERTION:
tibial tuberosity (tibia)
INNERVATION:
INNERVATION:
femoral nerve
femoral nerve
ACTION:
ACTION:
extends (lower) leg
extends (lower) leg
(part of quadriceps)
(Anterior view)
(Anterior view)
Muscles Moving (Lower) Leg - Anterior
Vastus intermedius
Muscles Moving (Lower) Leg - Posterior
(part of quadriceps)
ORIGIN:
Biceps femoris (part of hamstrings)
ORIGIN:
ischial tuberosity (ischium);
linea aspera (femur)
anterior / lateral surface
of proximal femur
INSERTION:
head (fibula);
lateral condyle (tibia)
INSERTION:
tibial tuberosity (tibia)
INNERVATION:
INNERVATION:
femoral nerve
sciatic nerve
ACTION:
ACTION:
extends (lower) leg
flexes (lower) leg
(Anterior view)
(Posterior view)
Muscles Moving (Lower) Leg - Posterior
Semitendinosus
Muscles Moving (Lower) Leg - Posterior
(part of hamstrings)
Semimembranosus
ORIGIN:
ischial tuberosity (ischium)
ORIGIN:
ischial tuberosity (ischium)
INSERTION:
medial surface of tibia
INSERTION:
medial condyle (tibia)
INNERVATION:
sciatic nerve
INNERVATION:
sciatic nerve
ACTION:
flexes (lower) leg
ACTION:
flexes (lower) leg
(Posterior view)
(part of hamstrings)
(Posterior view)
4
11/11/2012
Muscles Moving (Lower) Leg - Posterior
Muscles Moving Ankle / Foot / Toes - Anterior
Popliteus
Tibialis anterior
ORIGIN:
lateral condyle (femur)
ORIGIN:
lateral condyle (tibia);
shaft of tibia
INSERTION:
proximal tibia
INSERTION:
medial cuneiform (tarsals);
metatarsal 1
INNERVATION:
sciatic nerve
INNERVATION:
fibular nerves
ACTION:
flexes / medially rotates
(lower) leg
ACTION:
dorsiflexes / inverts foot
(Posterior view)
(Anterior view)
Muscles Moving Ankle / Foot / Toes - Anterior
Muscles Moving Ankle / Foot / Toes - Anterior
Extensor digitorum longus
Extensor hallucis longus
ORIGIN:
lateral condyle (tibia);
proximal fibula
ORIGIN:
anteromedial shaft of fibula
INSERTION:
distal phalanx (great toe)
INSERTION:
middle / distal phalanges 2 - 5
INNERVATION:
fibular nerves
INNERVATION:
fibular nerves
ACTION:
extends great toe
ACTION:
extends toes
(Anterior view)
(Anterior view)
Muscles Moving Ankle / Foot / Toes - Anterior
Muscles Moving Ankle / Foot / Toes - Posterior
Fibularis (longus / brevis)
Gastrocnemius
ORIGIN:
shaft of fibula
ORIGIN:
medial / lateral condyles (femur)
INSERTION:
medial cuneiform (tarsals);
metatarsals 1 & 5
INSERTION:
calcaneus
(part of triceps surae)
INNERVATION:
tibial nerve
INNERVATION:
fibular nerves
ACTION:
plantar flexes foot
ACTION:
plantar flexes / everts foot
Brevis
Longus
(Lateral view)
(Posterior view)
5
11/11/2012
Muscles Moving Ankle / Foot / Toes - Posterior
Muscles Moving Ankle / Foot / Toes - Posterior
Soleus (part of triceps surae)
Plantaris
ORIGIN:
proximal tibia / fibula
ORIGIN:
posterior femur
INSERTION:
calcaneus
INSERTION:
calcaneus
INNERVATION:
tibial nerve
INNERVATION:
tibial nerve
ACTION:
plantar flexes foot
ACTION:
plantar flexes foot
(Posterior view)
(Posterior view)
Muscles Moving Ankle / Foot / Toes - Posterior
Muscles Moving Ankle / Foot / Toes - Posterior
Flexor digitorum longus
Flexor hallicus longus
ORIGIN:
posterior tibia
ORIGIN:
midshaft of fibula
INSERTION:
distal phalanges 2 - 5
INSERTION:
distal phalanx (great toe)
INNERVATION:
tibial nerve
INNERVATION:
tibial nerve
ACTION:
flexes toes
ACTION:
flexes great toe
(Posterior view)
(Posterior view)
Muscles Moving Ankle / Foot / Toes - Posterior
Tibialis posterior
ORIGIN:
proximal tibia / fibula
INSERTION:
tarsals; metatarsals 2 - 4
INNERVATION:
tibial nerve
ACTION:
inverts foot
(Posterior view)
6