Chapter 26 ~ Thigh & Leg

Iliacus

Flex thigh

Synergists: psoas major.

Antagonists: gluteus maximus & hamstrings

Psoas major

flex thigh

Synergists: iliacus.

Antagonists: gluteus maximus & hamstrings

Sartorius

Contracts thigh muscles and rotates laterally

Synergists: rectus femoris

Antagonists: gluteus maximus & hamstrings

6

Adductor magnus

adducts thigh

Synergists: adductor longus

Antagonists: gluteus medius

5

Adductor longus

adducts thigh

Synergists: adductor magnus

Antagonists: gluteus medius

4

Gracilis

adducts thigh

Synergists: adductor longus

Antagonists: gluteus maximus & gluteus medius

Tensor fascia latae

Flexes & abducts thigh

Inserts: iliotibial tract

Synergists: gluteus medius & iliopsoas.

Antagonists: gluteus maximus & adductor magnus.

Gluteus maximus

Extends thigh

Synergists: hamstrings & gluteus medius.

Antagonists: iliopsoas & tensor fasciae latae.

Gluteus medius*

Abducts thigh

Originates: lateral surface of the ilium

Inserts: greater trochanter of femur

Synergists: tensor fasciae latae

Antagonists: adductor magnus & adductor longus

Rectus femoris*

Extends leg

Originates: Ilium

Inserts: patella

Synergists: vastus lateralis & vastus medialis

Antagonists: hamstrings & gluteus maximus

7

Vastus lateralis

extends leg

Synergists: rectus femoris & vastus medialis

Antagonists: hamstrings & gluteus maximus

2

Vastus medialis

extends leg

Synergists: rectus femoris & vastus lateralis

Antagonists: hamstrings & gluteus maximus

Vastus intermedius

extends leg

Synergists: rectus femoris & vastus lateralis

Antagonists: hamstrings & gluteus maximus

1

Biceps femoris*

Flexes leg

Originates: Ischial tuberosity & linea aspera

Inserts: head of fibula & next to the lateral condyle of tibia

Synergists: semitendinosus & semimembranosus

Antagonists: quadriceps femoris & rectus femoris

5

Semitendinosus

Flex leg

Synergists: semimembranosus.

Antagonists: quadriceps femoris

6

Semimembranosus

Flex leg

Synergists: semitendinosus

Antagonists: quadriceps femoris