Muscles of the Appendicular Skeleton (Lower Limb)

Origin of iliacus

Iliac fossa, iliac crest, & ala

Insertion of iliacus

Lesser trochanter

Innervation of iliacus

Femoral nerve

Action of iliacus

Flexes thigh

Origin of psoas major

T12-L5 vertebrae

Insertion of psoas major

Lesser trochanter

Action of psoas major

Flexes thigh

Origin of tensor fascia lata

Iliac crest & anterior superior iliac spine

Insertion of tensor fascia lata

Iliotibial tract

Innervation of tensor fascia lata

Superior gluteal nerve

Action of tensor fascia lata

Stabilizes leg on trunk

Origin of sartorius

Anterior superior iliac spine

Insertion of sartorius

Tibia

Innervation of sartorius

Femoral nerve

Action of sartorius

Flexes thigh

Origin of pectineus

Pubis

Insertion of pectineus

Lesser trochanter & linea aspera

Innervation of pectineus

Femoral nerve

Action of pectineus

Adducts thigh

Innervation of adductor brevis

Obturator nerve

Action of adductor brevis

Adducts thigh

Origin of adductor longus

Pubis

Insertion of adductor longus

Linea aspera

Innervation of adductor longus

Obturator nerve

Action of adductor longus

Adducts thigh

Origin of adductor magnus

Pubis & ischial tuberosity

Insertion of adductor magnus

Linea aspera

Innervation of adductor magnus

Obturator nerve & sciatic nerve

Action of adductor magnus

Adducts thigh

Origin of gracilis

Pubis & ischium

Insertion of gracilis

Tibia

Innervation of gracilis

Obturator nerve

Action of gracilis

Adducts thigh

Origin of gluteus maximus

Ilium, sacrum, & coccyx

Insertion of gluteus maximus

Gluteal tuberosity & iliotibial tract

Innervation of gluteus maximus

Inferior gluteal nerve

Action of gluteus maximus

Extends thigh

Origin of gluteus medius

Ilium

Insertion of gluteus medius

Greater trochanter

Innervation of gluteus medius

Superior gluteal nerve

Action of gluteus medius

Abducts thigh

Innervation of gluteus minimus

Superior gluteal nerve

Action of gluteus minimus

Abducts thigh

Origin of piriformis

Sacrum

Insertion of piriformis

Greater trochanter

Action of piriformis

Laterally rotates thigh

Innervation of obturators

Obturator nerve

Action of obturators

Laterally rotates thigh

Action of gemellus

Laterally rotates thigh

Origin of quadratus femoris

Ischial tuberosity

Insertion of quadratus femoris

Femur

Action of quadratus femoris

Laterally rotates thigh

Origin of rectus femoris

Anterior inferior iliac spine & acetabulum

Insertion of rectus femoris

Tibial tuberosity

Innervation of rectus femoris

Femoral nerve

Action of rectus femoris

Extends lower leg

Origin of vastus lateralis

Greater trochanter & linea aspera

Insertion of vastus lateralis

Tibial tuberosity

Innervation of vastus lateralis

Femoral nerve

Action of vastus lateralis

Extends lower leg

Origin of vastus medialis

Femoral, linea aspera, & medial supracondylar line

Insertion of vastus medialis

Tibial tuberosity

Innervation of vastus medialis

Femoral nerve

Action of vested medialis

Extends lower leg

Innervation of vastus intermedius

Femoral nerve

Action of vastus intermedius

Extends lower leg

Origin of biceps femoris

Ischial tuberosity & linea aspera

Insertion of biceps femoris

Fibular head & lateral condyle

Innervation of biceps femoris

Sciatic nerve

Action of biceps femoris

Flexes lower leg

Origin of semitendinous

Ischial tuberosity

Insertion of semitendinous

Tibia

Innervation of semitendinous

Sciatic nerve

Action of semitendinous

Flexes lower leg

Origin of semimembranosus

Ischial tuberosity

Insertion of semimembranosus

Medial condyle

Innervation of semimembranosus

Sciatic nerve

Action of semimembranosus

Flexes lower leg

Innervation of popliteus

Tibial nerve

Action of popliteus

Flexes lower leg

Origin of tibialis anterior

Lateral condyle & tibia

Insertion of tibialis anterior

Medial cuneiform & metatarsal 1

Innervation of tibialis anterial

Common fibular nerve

Action of tibialis anterior

Dorsiflexes foot

Origin of extensor digitorium longus

Lateral condyle & fibula

Insertion of extensor digitorium longus

Medial cuneiform & distal phalanges 2-5

Innervation of extensor digitorium longus

Common fibular nerve

Action of extensor digitorium longus

Extends toes

Innervation of extensor hallucis longus

Common fibular nerve

Action of extensor hallicis longus

Extends great toe

Origin of fibularis

Fibula

Insertion of fibularis

Medial cuneiform & metatarsal 1 & 5

Innervation of fibularis

Common fibular nerve

Action of fibularis

Plantar flexes foot

Origin of gastrocnemius

Medial condyle & lateral condyle

Insertion of gastrocnemius

Calcaneus

Innervation of gastrocnemius

Tibial nerve

Action of gastrocnemius

Plantar flexes foot

Innervation of soleus

Tibial nerve

Action of soleus

Plantar flexes foot