Thigh Muscles: Anterior Compartment

Question 1

Muscles of Anterior Thigh

Answer 1

• Sartorius
• Iliacus
• Psoas Major
• Pectineus
• Quadradus Femoris (rectus femoris, vastus medialis, vastus lateralis, vastus intermedius)

Question 2

Sartorius

Answer 2

O: Anterior inferior illiac spine (AIIS)

I: Medial shaft of tibia, anterior to gracilis’ insertion

N: Femoral nerve

A: Flex, ABduct, and Laterally Rotate HIP // Flex & Medially Rotate KNEE

Question 3

Iliacus

Answer 3

O: Iliac fossa

I: Lesser trochanter, with psoas major

N: Femoral Nerve

A: Flex thigh on trunk

Question 4

Psoas Major

Answer 4

O: T12-L5 TPs, bodies, and disks

I: Lesser trochanter, with iliac us

N: VPR of L1-L4

A: Flex thigh on trunk

Question 5

Pectineus

Answer 5

O: Superior ramus of pubis

I: Just below lesser trochanter

N: Femoral Nerve

A: Flex and ABduct THIGH

Question 6

Rectus Femoris

Answer 6

O: AIIS, ilium

I: Base of patella & to tibial tuberosity via patellar ligament

N: Femoral Nerve

A: Extend KNEE // Flex HIP

Question 7

Vastus Medialis

Answer 7

O: Intertrochanteric line

I: Base of patella & to tibial tuberosity via patellar ligament

N: Femoral Nerve

A: Extend KNEE

Question 8

Vastus Lateralis

Answer 8

O: Greater trochanter

I: Base of patella & to tibial tuberosity via patellar ligament

N: Femoral Nerve

A: Extend KNEE

Question 9

Vastus Intermedius

Answer 9

O: Anterior/lateral surface of shaft of femur

I: Base of patella & to tibial tuberosity via patellar ligament

N: Femoral Nerve

A: Extend KNEE