Muscles of the Anterior Thigh (Flexors)

Question 1

Pectineus M.

Answer 1

Origin: pectineal line of the superior ramus of the pubis

Insertion: pectineal line of the femur

action: flex the thigh and adduct the thigh inwards, assists in medial rotation

Innervation: femoral nerve (L2)

Question 2

Psoas Major M.

Answer 2

Origin: T12-L5 transverse process

Insertion: lesser trochanter of femur

action: flex the thigh and stabilize the hip joint

Innervation: Anterior Rami of Lumbar Nerves (L1,L2)

Question 3

Psoas Minor M.

Answer 3

Origin: T12-L1 transverse process

Insertion: pectineal line of the femur

Action: flex the thigh and stabilize the hip joint

Innervation: anterior rami of lumbar nerves (L1, L2)

Question 4

Iliacus Muscle

Answer 4

Origin: Iliac Crest & Iliac Fossa

Insertion: tendon of psoas major, lesser trochanter of femur

Innervation: Femoral Nerve (L2, L3)

Action: act conjointly to stabilize the hip and flex the thigh

Question 5

Sartorius M.

Answer 5

Origin: Anterior Superior Iliac Spine & Superior part of the notch of the femur to it

Insertion: Superior part of the medial surface of the tibia

Innervation: Femoral Nerve (L2, L3)

Action: Flex the thigh, laterally rotate the thigh, abduct the thigh, flex the leg at the knee joint