Anterior Femoral Muscles

Question 1

Iliopsoas

Answer 1

(L1-4)

Combination of iliacus and psoas major.

Question 2

Iliacus

Answer 2

(L2-4)

attachments- from iliac fossa, iliac crest, sacral ala & sacroiliac ligaments to lesser trochanter of femur

actions- flexes and stabilizes the hip joint

innervation- femoral nerve

Question 3

Psoas major

Answer 3

(L1-4)

attachments- from anterior transverse processes, vertebral bodies & discs (T12-L5) to the lesser trochanter of femur

actions- flexes and stabilizes the hip joint

innervation- ventral rami L1-4 (from lumbar plexus)

Question 4

Rectus femoris

Answer 4

(L2-4)

attachments- from anterior inferior iliac spine and groove superior to the acetabulum to the base of the patella

actions- flexes hip, and extends knee

innervation- femoral nerve

Question 5

Sartorius

Answer 5

(L2-3)

attachments- from anterior superior iliac spine to the medial aspect of the proximal tibia

actions- flexes, abducts & laterally rotates hip, and flexes & assists medial rotation of the knee

innervation- femoral nerve

Question 6

Tensor fasciae latae

Answer 6

(L4-S1)

attachments- from anterior superior iliac spine & external lip iliac crest to iliotibial tract

actions- abducts, flexes & medially rotates hip, and assists in maintaining knee extension

innervation- superior gluteal nerve

Question 7

Vastus intermedius

Answer 7

(L2-4)

attachments- from the anterior aspect of the proximal 2/3rds of the femoral shaft to the lateral border of the patella

actions- extends knee

innervation- femoral nerve

Question 8

Vastus lateralis

Answer 8

(L2-4)

attachments- from the intertrochanteric line, greater trochanter, gluteal tuberosity & linea aspera to the base & lateral border of the patella

actions- extends knee

innervation- femoral nerve

Question 9

Vastus medialis

Answer 9

(L2-4)

attachments- from the intertrochanteric line, spiral line, linea aspera & medial supracondylar line to the base & medial border of the patella

actions- extends leg

innervation- femoral nerve

Question 10

Articularis genu

Answer 10

(L2-4)

(small muscle that may be blended with vastus intermedius)

attachments- from the distal anterior shaft of femur to proximal portion of synovial membrane of knee joint

actions- pulls articular capsule proximally

innervation- femoral nerve (a branch of the nerve from the vastus intermedius)