Anterior and Middle Thigh

Anterior compartment Muscles include:

1. sartorius

2. rectus femoris

3. vastus lateralis

4. vastus medialis

5. vastus intermedius

Anterior compartment muscles acts on?

hip and knee joint

Quads do what?

extend the knee

Sartorious does what?

flexes the knee

What passes into the anterior thigh?

iliopsoas

Quadriceps Femoris

- rectus femoris

- 3 vastus muscles (lateralis, medialis, and intermedialis)

Quadriceps Femoris insertions

patella and tibial tuberosity

Quadriceps Femoris is a group of muscles that do what?

extend the knee

Rectus femoris also does what besides extends the knee?

flexes the hip

Vastus Muscles (lateralis, medialis, and intermedialis): Origin

femur

Vastus Muscles (lateralis, medialis, and intermedialis): Insertion

patella and tibia

Which of the Vastus Muscles is the largest?

vastus lateralis

Which of the Vastus muscles is found posterior to the rectus femoris?

vastus intermedius

Rectus Femoris crosses what?

both the hip and knee joints

Rectus Femoris: Origin

ilium

Rectus Femoris - Straight head: Origin

anterior inferior iliac spine (AIIS)

Rectus Femoris - Reflected head: Origin

Ilium just superior to the acetabulum

Rectus Femoris: Action

extending knee and hip flexion

Patellar Ligament: Functionally

continuation of quadriceps femoris tendon

Patellar ligament attaches above what?

patella

Patellar ligament attaches below what?

tibia

What is the LONGEST muscle in the body?

sartorius

Sartorius: Origin

anterior superior iliac spine

Sartorius: Insertion

medial tibia

Sartorius: Action

- flexion of the hip and knee

- abduction of thigh

- lateral rotation of thigh

Sartorius

lateral margin of the femoral triangle and anterior wall of adductor canal

Sartorius does what through the thigh?

descends obliquely

Medial Compartment Muscles has how many muscles?

6 hip adductor muscles

6 Medial Compartment Muscles:

1. gracilis

2. pectineus

3. obturator externus

4. adductor magnus

5. adductor longus

6. adductor brevis

What is the innervation of the medial compartment muscles?

obturator nerve

Gracilis

vertically runs down the medial side of the thigh

(medial compartment) Gracilis: Origin

pubic bone

(medial compartment) Gracilis: Insertion

proximal tibia

(medial compartment) Gracilis: Action

hip adductor and knee flexor

What is the most superficial of the medial compartment muscles?

gracilis

What does the Gracilis become sandwiched in between?

semitendinous and sartious muscles

Pes Aserinus

all compartments coming together

Pes Anserinus consists of what muscles:

sartorius, gracilis, and semitendonosus

Pes Anserinus: Action

medially rotate and flex the knee

What is located deep to the pes anserinus tendons on the medial aspect of the knee?

bursa

What is the clinical significance of the Pes Anserinus?

pes anserine bursitis

Pectineus

flat muscle

Pectineus: Origin

pectineal line of pelvic bone where it passes under the inguinal ligament

Pectineus: Insertion

femur (below lesser trochanter)

Pectineus: Action

hip adductor and hip flexor

Adductor Longus: Origin

body of pubis (lateral to symphysis pubis)

Adductor Longus: Insertion

mid-femur

Adductor Longus: Action

hip adduction and medial rotation of hip

What contributes to the floor of the femoral triangle and posterior wall of adductor canal?

adductor longus

Adductor Brevis: Origin

pubis

Adductor Brevis: Insertion

shaft of femur, between pectineus and adductor longus

Adductor Brevis: Action

hip adduction and medial rotation of hip

What is muscle is found posterior to pectineus and adductor longus?

adductor brevis

Adductor Magnus: Origin

inferior pubic ramus to ischial tuberosity

Adductor Magnus: Insertion

down the surface of the femur

Adductor Magnus: Action

hip adduction and medial rotation of hip

Adductor Magnus: Innervation

both obturator and sciatic nerves

What is between two parts?

Adductor hiatus

What forms the distal wall of adductor canal?

adductor magnus

Adductor canal

extends from apex of femoral triangle to adductor hiatus

What are the contents of adductor canal?

- femoral artery

- femoral vein

- branches of femoral nerve

Femoral artery and vein exit canal at the adductor hiatus, becomes what?

popliteal artery and vein