Muscle Chart: Muscles Of The Anterior Hip And Thigh

Question 1

Psoas Major

Origin, Insertion, Innervation, Blood Supply

Answer 1

Origin: Bodies of transverse processes of lumbar vertebrae

Insertion: Lesser trochanter of the femur

Innervation: L1, L2, L3, L4 spinal nerves

Blood Supply: Iliolumbar artery (branch from abdominal aorta)

Question 2

Psoas Major Movements

Answer 2

With origin fixed: Flex and laterally rotate the hip

With insertion fixed: Flex the trunk toward the thigh

Unilaterally: Assist to laterally flex the lumbar spine

Question 3

Iliacus

Origin, Insertion, Innervation, Blood Supply

Answer 3

Origin: Iliac fossa

Insertion: Lesser trochanter of the femur

Innervation: L1, L2, L3, L4

Blood Supply: Medial circumflex femoral artery

Question 4

Iliacus Movements

Answer 4

Origin Fixed: Flex the hip and laterally rotate

Insertion Fixed: Tilt innominate (pelvis) anteriorly

Innervation: Femoral nerve L1, L2, L3, L4

Blood Supply: Medial circumflex femoral artery

Question 5

Pectinous (part of the adductor muscle group)

Origin, Insertion, Innervation, Blood Supply

Answer 5

Origin: Superior ramus of pubis

Insertion: Pectineal line of femur

Innervation: Femoral nerve (L2, L3) and obturator nerve (L2, L3)

Blood Supply: Medial circumflex artery

Question 6

Pectineus Movements

Answer 6

Assist with flexion and adduction of the hip.

Shunting muscle to stabilize hip and reinforce the pubic symphysis

Question 7

Rectus Femoris

Origin, Insertion, Innervation, Blood Supply

Answer 7

Origin: Anterior inferior iliac spine (AIIS)

Insertion: Tibial tuberosity (via patella and patellar ligament)

Innervation: Femoral L2, L3, L4

Blood Supply: Lateral circumflex femoral artery

Question 8

Rectus Femoris Movements

Answer 8

Extends the knee and flexes the thigh at the hip

Question 9

Vastus Lateralis

Origin, Insertion, Innervation, Blood Supply

Answer 9

Origin: Lateral lip of the linea aspera, gluteal tuberosity and greater trochanter

Insertion: Tibial tuberosity (via patella and patellar ligament)

Innervation: Femoral nerve L2, L3, L4

Blood Supply: Lateral circumflex femoral artery (descending branch)

Question 10

Vastus Lateralis Movements

Answer 10

Extends the knee

Question 11

Vastus Medialis

Origin, Insertion, Innervation, Blood Supply

Answer 11

Origin: Medial lip of linea aspera

Insertion: Tibial tuberosity (via the patella and patellar ligament)

Innervation: Femoral nerve L2, L3, L4

Blood Supply: Femoral artery

Question 12

Vastus Medialis Movements

Answer 12

Extends the knee

Question 13

Vastus Intermedius

Origin, Insertion, Innervation, Blood Supply

Answer 13

Origin: Anterior and lateral shaft of the femur

Insertion: Tibial tuberosity (via patella and patellar ligament)

Innervation: Femoral nerve L2, L3, L4

Blood Supply: Lateral circumflex femoral artery (descending branch)

Question 14

Vastus Intermedius Movements

Answer 14

Extends the knee

Question 15

Sartorius

Origin, Insertion, Innervation, Blood Supply

Answer 15

Origin: Anterior superior iliac spine (ASIS)

Insertion: Proximal medial shaft of the tibia at pes anserinus

Innervation: Femoral nerve L2, L3, L4

Blood Supply: Profunda femoris (deep artery of the thigh)

Question 16

Sartorius Movements

Answer 16

Flexes the hip

Laterally rotate and abduct the hip

Flex knee and medially rotate the flexed knee