Thigh Muscles (TFL and Onward)

Question 1

Tensor Facsciae Latae

Answer 1

A: Flex the hip (coxal joint) Medially rotate the hip (coxal joint) Abduct the hip (coxal joint) O: Iliac crest, posterior to the ASIS I: Iliotibial tract N: Superior gluteal L4, 5, S1

Question 2

Sartorius

Answer 2

A: Flex, laterally rotate, and abduct the hip (coxal joint) Flex knee (tibiofemeral joint) Medially rotate the flexed knee (T/F joint) O: ASIS I: Proximal, medial shaft of tibia at pes anserinus tendon N: Femoral L2, 3, (4)

Question 3

Piriformis

Answer 3

A: Laterally rotate the hip (coxal joint) Abduct the hip when flexed O: Anterior surface of sacrum I: Superior aspect of greater trochanter N: Sacral Plexus L(5), S12

Question 4

Quadratus Femoris

Answer 4

A: Laterally rotate the hip (coxal joint) O: Lateral border of ischial tuberosity (coxal joint) I: Intertrochanteric crest, between the greater and lesser trochanters. N: Sacral plexus L4, 5, S1, (2)

Question 5

Obturator Internus

Answer 5

A: Laterally rotate the hip (coxal joint) O: Obturator membrane and inferior surface of obturator foramen I: Medial surface of greater trochanter N: Sacral plexus L5, S1, 2

Question 6

Obturator Externus

Answer 6

A: Laterally rotate the hip (Coxal joint) O: Rami of pubis and ischium, obturator membrane I: Trochanteric fossa of femur N: Obturator L3, 4

Question 7

Gemellus Superior

Answer 7

A: Laterally Rotate the hip (Coxal joint) O: Ischial spine I: Medial surface of great trochanter N: Sacral plexus L5, S1, 2

Question 8

Gemellus Inferior

Answer 8

A: Laterally rotate the hip (Coxal joint) O: Ischial tuberosity I: Medial surface of greater trochanter N: Sacral plexus L4,5, S1,(2)

Question 9

Psoas Major

Answer 9

A: With the origin fixed: Flex the hip (coxal joint) May laterally rotate the hip (coxal joint) With the insertion fixed: Flex the trunk toward the thigh Tilt pelvis anteriorly Unilaterally: Assist to laterally flex the lumbar spine O: Bodies and transverse processes of lumbar vertebrae I: Lesser Trochanter N: Lumbar plexus L1,2,3,4

Question 10

Iliacus

Answer 10

A: With the origin fixed: Flex the hip (coxal joint) May laterally rotate the hip (coxal joint) With the insertion fixed: Flex the trunk toward the thigh Tilt pelvis anteriorly O: Iliac fossa I: Lesser trochanter N: Femoral L(1), 2,3,4