LE Origins, insertions, Actions and Innervations

Iliopsoas Origin

Iliac fossa, anterior and lateral surfaces of T12-L5

Iliopsoas Insertion

Lesser trochanter

Iliopsoas Actions

Hip flexion

Iliopsoas Innervations

Iliacus- Femoral N. (L2, L3)

Psoas Major N. ( L2, L3)

Rectus Femoris Origin

AIIS

Rectus Femoris Insertion

Tibial Tuberosity

Rectus Femoris Actions

Hip flexion, Knee extension

Rectus Femoris Innervation

Femoral N. (L2, L3, L4)

Sartorius Origin

ASIS

Sartorius Insertion

Proximal medial aspect of tibia

Sartorius Actions

Combination of hip flexion, abduction, ER, and knee flexion

Sartorius Innervation

Femoral N

Pectineus Origin

Superior Ramus of pubis

Pectineus Insertion

Pectineal Line if femur

Pectineus Actions

Hip flexion and adduction

Pectineus Innervation

Femoral N

Adductor Longus Origin

Pubis

Adductor Longus Insertion

Middle 1/3 of linea aspera

Adductor Longus Actions

Hip adduction

Adductor Longus Innervation

Obturator N

Adductor Brevis Origin

Pubis

Adductor Brevis Insertion

Pectineal line and proximal linea aspera

Adductor Brevis Action

Hip adduction

Adductor Brevis Innervation

Obturator N

Adductor Magnus Origin

Ischium and pubis

Adductor Magnus Insertion

entire linea aspera and adductor tubercle

Adductor Magnus Action

Hip adduction

Adductor Magnus Innervation

Obturator N

Gracilis Origin

Pubis

Gracilis Insertion

Anteromedial surface of proximal end of tibia

Gracilis Action

Hip adduction

Gracilis Innervation

Obturator N

Gluteus Maximus Origin

Pubis

Gluteus Maximus insertion

Posterior femur distal to greater trochanter to IT band

Gluteus Maximus Action

Hip extension, hypertension, ER

Gluteus Maximus Innervation

Inferior Gluteal N.

Deep Rotator Muscles – Super Six- Origin

(Piriformis, Gemellus superior, Gemellus Inferior, Quadratus Femoris, Quadratus Internus, Obturator Externus)

Anterior Sacrum, Ischium, pubis

Deep Rotator Muscles – Super Six- Insertion

(Piriformis, Gemellus superior, Gemellus Inferior, Quadratus Femoris, Quadratus Internus, Obturator Externus)

Greater Trochanter area

Deep Rotator Muscles – Super Six- Action

(Piriformis, Gemellus superior, Gemellus Inferior, Quadratus Femoris, Quadratus Internus, Obturator Externus)

Hip Lateral rotation (ER)

Deep Rotator Muscles – Super Six- Innervation

(Piriformis, Gemellus superior, Gemellus Inferior, Quadratus Femoris, Quadratus Internus, Obturator Externus)

Varied

Semimembranosus Origin

Ischial Tuberosity

Semimembranosus Insertion

Anteromedial surface of proximal tibia

Semimembranosus Actions

Hip extension, knee flexion

Semimembranosus Innervation

Sciatic N

Semitendinosus Origin

Ischial tuberosity

Semitendinosus Insertion

Posterior surface of medial condyle of tibia

Semitendinosus actions

Hip extension, knee flexion

Semitendinosus Innervation

Sciatic N, (tibial Division) (L5, S1, S2)

Biceps Femoris Origin

Long head- Ischial Tuberosity

Short Head- lateral lip of linea aspera

Biceps Femoris Insertion

Fibular head

Biceps Femoris Actions

Long Head- Hip extension and knee flexion

Short Head- Knee flexion

Biceps Femoris Innervation

Long Head- Sciatic N, (tibial Division) (L5, S1, S2)

Short Head- Common Fibular (peroneal) N. (L5, S1, S2)

Gluteus Medius Origin

Outer surface of ilium

Gluteus Medius Insertion

Lateral surface of greater trochanter

Gluteus Medius Actions

Hip abduction

Gluteus Medius Innervation

Superior gluteal N. (L4, L5, S1)

Gluteus Minimus Origin

Lateral surface of ilium

Gluteus Minimus Insertion

Anterior surface of greater trochanter

Gluteus Minimus Action

Hip Abduction, IR

Gluteus Minimus Innervation

Superior Gluteal N

Tensor Fascia Lata Origin

ASIS

Tensor Fascia Lata Insertion

Lateral condyle of tibia

Tensor Fascia Lata Action

Combined Hip flexion and abduction

Tensor Fascia Lata Innervation

Superior Gluteal N

Rectus Femoris Origin

AIIS

Rectus Femoris Insertion

Tibial Tuberosity via patellar tendon

Rectus Femoris Action

Hip flexion, knee extension

Rectus Femoris Innervation

Femoral N

Vastus Lateralis Origin

Linea Aspera

Vastus Lateralis Insertion

TIbial Tuberosity via patellar tendon

Vastus Lateralis Action

Knee extension

Vastus Lateralis Innervation

Femoral N

Vastus Medialis Origin

Linea aspera

Vastus Medialis Insertion

Tibial Tuberosity via patellar tendon

Vastus Medialis Action

Knee extension

Vastus Medialis Innervation

Femoral N

Vastus intermedius Origin

Anterior femur

Vastus intermedius Insertion

Tibial Tuberosity via patellar tendon

Vastus intermedius Action

Knee extension

Vastus intermedius Innervation

Femoral N

Popliteus Origin

Lateral Condyle of femus

Popliteus Insertion

Posterior medial condyle of tibia

Popliteus Action

Initiates knee flexion; Screw- home mechanism—> Unlocks the knee

Popliteus Innervation

Tibial N

Gastrocnemius Origin

Medial and lateral condyles of femur

Gastrocnemius Insertion

Posterior Calcaneus

Gastrocnemius Action

Knee flexion and ankle PF

Gastrocnemius Innervation

Tibial N

Soleus Origin

posterior tibia and fibula

Soleus Insertion

Posterior Calcaneus

Soleus Action

Ankle PF

Soleus Innervation

Tibial N

Plantaris Origin

Posterior lateral condyle of femur

Plantaris Insertion

Posterior calcaneus

Plantaris Action

very weak assist in knee flexion and ankle PF

Plantaris Innervation

Tibial N

Tibialis Posterior Origin

Interosseous membrane

Tibialis Posterior Insertion

Navicular and most tarsals and metatarsals

Tibialis Posterior Action

Ankle inversion, assist in PF

Tibialis Posterior Innervation

Tibial N