Quadriceps

 All insert at tibial tuberosity

Rectus Femoris

O - anterior inferior iliac spine

Vastus Medialis

O - medial lip of linea aspera

Vastus Intermedius

O - Anterior and lateral shaft of femur

Vastus Lateralis

O - Lateral lip of linea aspera, gluteal tuberosity

ACTIONS

All:   Extend knee (tibiofemoral joint)

Rectus Femoris:  flex hip (coaxal joint)

Rectus Femoris

O - Anterior Inferior Iliac Spine - AIIS

I - Tibial Tuberosity

ACTIONS

*Extends knee

*Flex hip

Vastus Medialis

O - Medial lip of linea aspera

I -  Tibial Tuberosity

ACTIONS

*Extend knee

Vastus Intermedius

O - Anterior lateral shaft of femur

I - Tibial Tuberosity

ACTIONS

*Extend knee

Hamstrings

Biceps Femoris

O-Long: Ischial tuberosity Short: lateral lip linea aspera, I-Head of fibula

Semitendinosis

O-Ischial tuberosity, I-Proximal, medial shaft tibia (at pes anserinus tendon)

Semimembranosis

O-Ischial tuberosity, I-Posterior aspect medial condyle tibia

ACTIONS

All:                                      Bicep Femoris:

*flex knee                       *Lat rotate flexed knee

*Extend hip                     *Lat rotate hip

*Tilt pelvis posteriorly

Semi-M and T:   Medially rotate hip and flexed knee

Biceps Femoris

O - Ischial Tuberosity, lateral lip linea aspera

I - Head of Fibula

ACTIONS

*Flex knee

*Extend hip

*Tilt pelvis posteriorly

*Laterally rotate hip and flexed knee

Semitendinosis

O - Ischial Tuberosity

I - Proximal Medial Shaft Tibia

ACTIONS

*Flex knee

*Extend hip

*Tilt pelvis posteriorly

*Medially rotate hip and flexed knee

Semimembranosis

O - Ischial Tuberosity

I - Posterior Medial Condyle Tibia

ACTIONS

*Flex knee

*Extend hip

*Tilt pelvis posteriorly

*Medially rotate hip and flexed knee

Gluteals

Gluteus Minimus

Gluteus Medius

Gluteus Maximus

Gluteus Minimus

O - External surface ilium between anterior and inferior gluteal lines

I - Anterior border greater trochanter

ACTIONS

*Abduct, flex, and medially rotate hip

Gluteus Medius

O - External surface ilium between iliac crest and posterior/anterior gluteal lines

I - Greater Trochanter

ACTIONS

*Abduct, flex, and extend hip

*Medially and laterally rotate hip

Gluteus Maximus

O - coccyx, posterior sacrum, posterior iliac crest

I - gluteal tuberosity, iliotibial tract 

ACTIONS

*Abduct, extend, and laterally rotate hip

*Lower fibers ADDuct hip

Adductor Group

Pectinius                      O- Inferior, superior ramus of pubis,

Adductor Brevis                  ramus of ischium, pubic tubercle,

Adductor Longis                  ischial tuberosity  

Adductor Magnus

Gracilis                          I- Linea aspera, adductor tubercle,

                                       pectineal line of femur, proximal,

                                       medial shaft of tibia

ACTIONS

*Adduct hip

*Medially rotate hip

*Assist in flexion (not gracilis)

Tensor Fascia Latae

O - Iliac Crest

I - Iliotibial tract

ACTIONS

*Flex hip

*Medially rotate hip

*Abduct hip

Iliopsoas

O - Iliac fossa, bodies of transverse processes lumbar vertebrae

I - Lesser trochanter femur

ACTIONS

*Flex hip

*Laterally rotate hip

*Adduct hip

Sartorius

O - Anterior Superior Iliac Spine

I - Proximal, Medial Shaft Tibia

ACTIONS

*Flex hip

*Laterally rotate hip

*Medially rotate flexed knee

Piriformis

O - Anterior Surface Sacrum

I - Greater Trochanter

ACTIONS

*Laterally roate hip

*Abduct hip when hip flexed

Vastus Lateralis

O - Lateral lip of linea aspera, gluteal tuberosity   

I - Tibial Tuberosity

ACTIONS

*Extend knee