Lower Extremity 1st Part

Question 1

Origin of the Psoas major

Answer 1

Vertebral bodies of T12-L4; Transverse processes of L1-L5; intervertebral discs T12-L4

Question 2

Insertion of the psoas Major

Answer 2

Lesser trochanter of femur

Question 3

Function of the psoas Major

Answer 3

F of the thigh at the hip joint ; Lateral Rotation of the
thigh; Lateral flexion

Question 4

Origin of the illiacus

Answer 4

illiac fossa

Question 5

Insertion of the illiacus

Answer 5

lesser trochanter of femur

Question 6

function of the iliacus

Answer 6

Flex of the thigh and trunk

Question 7

Origin of the tensor fasciae latae (TFL)

Answer 7

AS IS; iliac crest

Question 8

Insertion of The TFL and iliotibial tract

Answer 8

TFL → iliotibial tract
iliotibial tract → Lateral condyle of tibia

Question 9

Function of TFL and iliotibial tract

Answer 9

Thigh internal rotation; stability of the hip and knee joints; weak abduction; knee ext. Rotation; weak knee flex/ext.

Question 10

origin of gluteus maximus

Answer 10

Lateral posterion surface of sacrum and coccyx; posterior gluteal line of ilium; Sacrotuberous lig.

Question 11

Insertion of the gluteus maximus

Answer 11

Upper fibers → iliotibial tract
Lower fibers -> Gluteal tuberosity of femur

Question 12

function of gluteus maximus

Answer 12

Ext. external rotation; abduction of thigh

Question 13

Origin of gluteus medius

Answer 13

Gluteal surface of ilium

Question 14

Insertion of the gluteus medius

Answer 14

Lateral surface of the greater trochanter of the
femur

Question 15

Function of the gluteus medius

Answer 15

Abduction; Ext. Of Thigh; stability of hip joint
Anterior fibers → Assist in Int.Rota.
Postenion fibers → Assist in Ext.Rota.

Question 16

Origin of gluteus minimus

Answer 16

Gluteal surface of ilium

Question 17

Insertion of the gluteus minimus

Answer 17

Ant. Surface of the greater trochanter of the femur

Question 18

function of the gluteus minimus

Answer 18

Abduction; stabilises hip joint
Anterior fibers → Assist in Int.rota.
Posterior fibers → Assist in Ext.rota.

Question 19

What’s a gluteal aponeurosis

Answer 19

A dense fibrous membrane
Between the iliac crest and superior border of the gluteus maximus
Belongs to fasciae latae

Question 20

Origin of Piriformis

Answer 20

Anterior surface of sacrum (S2-S4)
gluteal surface of ilium (close to PIIS)

Question 21

Insertion of piriformis

Answer 21

Upper border apex of greater trochanter of femur

Question 22

function of the piriformis

Answer 22

Ext.Rota.; abduction of thigh; stability of hip joint

Question 23

Origin of obturator internus

Answer 23

Inner (posterior) surface of the obturator foramen (across pubis and ischium)

Question 24

Insertion of obturator internus

Answer 24

medial surface of greater Trochanter of the femur (above trochanteric
fossa)

Question 25

function of the Obturator internus

Answer 25

Ext.Rota. Abduction stability of hip joint

Question 26

origin of obturator externus

Answer 26

Bony boundaries of oblurator foramen Canterion surface of obturator foramen)

Question 27

Insertion of obturator Externus

Answer 27

Trochanteric fossa of the femur

Question 28

function of the obturator externus

Answer 28

Ext. Rota. Abduction of thigh stability of hip joint

Question 29

Origin of superior gemellus

Answer 29

Ischial spine

Question 30

Insertion of the superior gemellus

Answer 30

Medial surface of greater trochanter of femur

Question 31

Function of the superion gemellus

Answer 31

Ext. Rota. abduction of thigh stabilise head of femur in acetabulum

Question 32

Origin of the inferior gemellus

Answer 32

Ischial tuberosity

Question 33

Insertion of the inferior gemellus

Answer 33

Medial surface of greater trochanter of femur

Question 34

function of inferior Gemellus

Answer 34

Ext. Rota. adduction Abduction Stabilises head of femur in acetabulum

Question 35

Origin of the Quadratus femoris

Answer 35

Lateral border of ischial tuberosity

Question 36

Insertion of the Quadratus femoris

Answer 36

Intertrochanteric crest of femur

Question 37

Function of the Quadratus femoris

Answer 37

Ext. Rot. Adduction of thigh stability of the head of femur in acetabulum

Question 38

Origin of Sartorius

Answer 38

ASIS

Question 39

Insertion of Sartorius

Answer 39

Proximal end of tibia below medial condyle

Question 40

Function of Sartorius

Answer 40

Flex. Adduction ; Ext. Rota. of thigh at hip joint ; Flex. Int. Rota. of lower leg at knee joint

Question 41

Origin of the Rectus Femoris

Answer 41

AIIS and a groove superior the acetabulum ?

Question 41

Insertion of the Rectus Femoris

Answer 41

Common tendon of the Quad. enclosing the patella and inserting on the tibial tuberosity

Question 42

Function of the Rectus Femoris

Answer 42

Ext. of the leg at knee joint Flex. of hip (only the rectus femoris can do this in all quads)

Question 43

Origin of the Vastus Lateralis

Answer 43

Greater Trochanter and upper surface of the linea aspera of the femur

Question 44

Insertion of the Vastus Lateralis

Answer 44

Patella via the Quads. tendon and tibial tuberosity via the patellar lig.

Question 45

Function of the Vastus Lateralis

Answer 45

Ext. of the leg at knee joint

Question 46

Origin of the Vastus Intermedius

Answer 46

Anterior Upper Surface of Femoral shaft

Question 47

Insertion of the Vastus Intermedius

Answer 47

Common tendon of the Quads. enclosing the patella and inserting on the tibial tuberosity

Question 48

Function of the vastus Intermedius

Answer 48

Ext. of leg at knee joint