Anterior thigh muscles

Question 1

what are the 4 anterior thigh muscles

Answer 1

Pectineus
Iliopsoas (made up of 3 muscles)
Sartorius
Quadriceps Femoris ( 4 headed muscle)

Question 2

Pectineus

Answer 2

Pectineal line of superior pubic ramus

Pectineal line of the femur

Femoral nerve

Adducts and flexes thigh, assists medial rotation

Question 3

Iliopsoas

Answer 3

Chief Flexor of the thigh
Consists of 3 muscles - Iliacus, Psoas major and minor.

Illiacus + Psoas = iliopsoas

pass under the inguinal ligament

Question 4

Psoas Major

PA
DA
N
A

Answer 4

PA - Side and Tps of T12 - L5 and IVD (intra vertebral discs?)

Lesser trochanter

Anterior rami, lumbar nerve L1-3

Activating with iliacus, it flexes thigh and stabilises hip. side- bend and balances trunk when contracting in isolation.

Question 5

Iliacus

PA
DA
N
A

Answer 5

Iliac crest and fossa, sacral ala

lesser trochanter of femur

Femoral nerve

Flexs thigh at hip, stabilises hip joint.

Question 6

Sartorius

PA
DA
N
A

Answer 6

Produces movement results in cross legged position

Longest muscle in the body

ASIS

Superior medial tibia

Femoral nerve

Flexion, adduction, external rotation of hip, slight flexion of the knee joint, medially rotates leg when knee is flexed

Question 7

Quadricpes Femoris

Answer 7

4 headed muscle of the thigh

Rectus Femoris
Vastus Lateralis
Vastus Medialis
Vastus Intermedius

attachs to the patella and tibia, purpose of the patella is to increase the force of the quadricpe, also protects anterior knee joint.

Vast med and lat have additional attachment - Med and lat patella retinaculae

Question 8

Rectus Femoris

PA
DA
N
A

Answer 8

Rectus Femoris - AIIS

They all unite at the quadriceps tendon which attaches to base ( superior end) of patella via patella ligamanet.

Femoral Nerve

Extends leg at knee joint, Rectus femoris assists in thigh flexion

Question 9

Vastus Lateralis

PA
DA
N
A

Answer 9

Vastus Lateralis - Greather trochanter & lateral lip of linea aspera

attaches to base ( superior end) of patella via patella ligamanet and lat patella retinaculae

Femoral Nerve

Extends leg at knee joint

Question 10

Vastus Intermedius

PA
DA
N
A

Answer 10

Anterior & Lateral surfaces of shaft of femur.

attaches to base ( superior end) of patella via patella ligamanet

Femoral Nerve

Extends leg at knee joint,

Question 11

Vastus Medialis

PA
DA
N
A

Answer 11

• intertrochanteric line & medial lip of linea aspera.

attaches to base ( superior end) of patella via patella ligamanet.

Femoral Nerve

Extends leg at knee joint