The hip flexors

Question 1

Which muscles form the hip flexors?

Answer 1

Iliotibial-psoas
Pectineus
Rectus femoris
Sartorius

Question 2

State the muscle attachments and nerve supply of iliotibial-psoas

Answer 2

Conjoined muscle and tendon of Psoas and Major (TP T12-L4) and Iliacus (iliac fossa)
Insertion: lesser trochanter

Nerve supply: innervation L2-L3

Question 3

State the muscle attachments and nerve supply of pectineus

Answer 3

Origin: superior pubic ramus
Insertion: lesser trochanter to the linea aspera (pectineal line)

Nerve supply: femoral nerve L2-L4

Question 4

State the muscle attachments and nerve supply of Rectus Femoris

Answer 4

Origins:
Long head- AIIS
Short head-ilium above acetabulum.
Insertion: quadriceps tendon of the patella

Nerve supply: femoral nerve L2-L4

Question 5

State the muscle attachments and nerve supply of Sartorius

Answer 5

Origin: ASIS
Insertion: anterior-medial surface of the proximal tibia

Nerve supply: Femoral nerve L2-L3

Question 6

What are the functions of the flexor muscles?

Answer 6

Iliotibial-Psoas flexes the hip and trunk

Pectineus flexes and adducts the thigh.

RF extends the knee and flexes the hip

Sartorius flexes, abducts and laterally rotates the thigh. Medially rotates the flexed knee