Anterior thigh

Question 1

Articularis genus

Answer 1

Attachments: distal femur to suprapatellar bursa
Innervation: femoral nerve
Actions: pulls suprapatellar bursa superiorly with knee extension

Question 2

Iliacus (Iliopsoas)

Answer 2

Attachments: superior iliac fossa, iliac crest, ala of sacrum, anterior sacro-iliac ligaments to lesser trochanter
Innervation: femoral nerve
Actions: flexes hip, stabilizes hip joint, works with psoas major

Question 3

Psoas major (iliopsoas)

Answer 3

Attachments: transverse processes and bodies of verterbrae T12-L5 to lesser trochanter
Innervation: ventral rami of first lumbar nerve
Actions: flexes hip and trunk with iliacus, flexes spine laterally, balances trunk in sitting position

Question 4

Rectus femoris

Answer 4

Attachments: AIIS to base of patella/tibial tuberosity via patellar tendon
Innervation: femoral nerve
Actions: extends knee, flexes hip

Question 5

Sartorius

Answer 5

Attachments: ASIS to superior/medial tibia (pes anserine)
Innervation: femoral nerve
Actions: abducts hip, flexes hip, ER hip, flexes knee

Question 6

Vastus intermedius

Answer 6

Attachments: anterior/lateral femur to patellar tendon
Innervation: femoral nerve
Actions: extends knee

Question 7

Vastus lateralis

Answer 7

Attachments: greater trochanter, lateral linea aspera to patellar tendon
Innervation: femoral nerve
Actions: extends knee

Question 8

Vastus medialis

Answer 8

Attachments: intertrochanteric line, medial linea aspera to patellar tendon
Innervation: femoral nerve
Actions: extends knee