Muscles Associated with the lower extremity

What are the six muscles of the hip?

• iliacus (iliopsoas)

• psoas major (iliopsoas)

• gluteus maximus

• gluteus medius

• gluteus minimus

• piriformis

What does the iliacus (iliopsoas) and psoas major (iliopsoas) do?

they flex the hip

what nerve supplies the iliacus (iliopsoas)?

The femoral nerve

What does the gluteus Maximus do?

It extends, laterally rotates, and abducts the hip

what does the gluetus medius and gluteus minimus do?

They abducts and medially rotate the hip

What does the piriformis do?

It extends, laterally rotates, and abducts the hip

What nerve supplies the gluteus maximus, medius, and minimus?

The gluteal nerves

What are the five muscles of the anterior thigh?

• Rectus femoris (quadriceps)

• Vastus lateralis (quadriceps)

• Vastus medialis (quadriceps)

• Vastus intermedius (quadriceps)

• Sartorius

What does the Rectus femoris (quadriceps) do?

It flexes the hip and extends the knee

What does the vastus lateralis, medialis, and intermedius (quadriceps) do?

They extend the knee

What does the sartorius do?

It flexes and laterally rotates the hip, and flexes the knee

What nerve supplies the muscles of the anterior thigh?

The femoral nerve

What are the three muscles of the posterior thigh?

• biceps femoris (hamstrings)

• semitendinosus (hamstrings)

• semimembranosus (hamstrings)

What do the muscles of the posterior thigh do?

They flex the knee and extend the hip

What nerve supplies the muscles of the posterior thigh?

The tibial nerve

What are the five muscles of the medial thigh?

• adductor Magnus

• adductor longus

• adductor brevis

• pectineus

• gracilis

What do the muscles of the medial thigh (except the gracilis) do?

they adduct the hip

What does the gracilis do?

It adducts the hip and flexes the knee

What nerve supplies the adductor Magnus, longs, and brevis?

The obturator nerve

What nerve supplies the pectineus?

The femoral nerve

What nerve supplies the gracilis?

The obturator nerve (g)

What are the five muscles of the leg?

• Gastrocnemius

• soleus

• other muscles of the posterior compartment

• anterior compartment

• lateral compartment

What does the Gastrocnemius do?

It plantar flexes the ankle and flexes the knee

What does the soleus do?

It plantar flexes the ankle

What do other muscles of the posterior compartment do?

they plantar flex the ankle and flex the toes

What does the anterior compartment do?

It dorsiflexes and inverts the ankle, and extends the toes

What does the lateral compartment do?

It plantar flexes and everts the ankle

What nerve supplies the Gastrocnemius, soleus, and other muscles of the posterior compartment?

The tibial nerve

What nerve supplies the anterior compartment?

the deep fibular nerve

What nerve supplies the lateral compartment?

the superficial fibular