Muscles Of The Hip Joint

Question 1

Psoas major (of iliopsoas)

Answer 1

Origin- anterolateral lumbar spine

Insertion- lesser trochanter of the femur

Functions-
Flexes,abducts and laterally rotates the thigh at the hip joint
Posteriorly tilts the pelvis at the LS joint

Question 2

Iliacus (of iliopsoas)

Answer 2

Origin- upper iliac fossa and anterior inferior iliac spine and sacral ala

Insertion- lesser trochanter of the femur

Functions-
Flexes and laterally rotates the thigh at the hip joint

Question 3

Adductor longus

Answer 3

Origin- anterior body of the pubis

Insertion- the medial lip of the linea aspera of the femur

Functions-
Adducts and flexes the thigh at the hip joint

Question 4

Adductor Magnus

Answer 4

Origin-
Anterior head- inferior pubis ramus and the ramus of the ischium
Posterior head- ischial tuberosity

Insertion- linea aspera of the femur

Functions-
Adducts and extends the thigh at the hip joint

Question 5

Gluteus maximus

Answer 5

Origin- posterior iliac crest, posterolateral sacrum and the Coccyx

Insertion- iliotibial band and the gluteal tuberosity of the femur

Functions-
Extends and laterally rotates the thigh at the hip joint
Abducts the thigh (upper 1/3) and adducts (lower 2/3) at the hip joint

Question 6

Gluteus medius

Answer 6

Origin- external ilium, inferior to the iliac crest

Insertion- lateral surface of the greater trochanter of the femur

Functions-
Abducts the thigh at the hip joint
Posterior fibres- extends and laterally rotates the thigh
Anterior fibres- flexes and medially rotates the thigh

Question 7

Gluteus minimus

Answer 7

Origin- external ilium between the anterior and inferior gluteal lines

Insertion- anterior surface of the greater trochanter of the femur

Functions-
Abducts the thigh at the hip joint
Anterior fibres- flexes and medially rotates the thigh
Posterior fibres- extends and laterally rotates the fibres

Question 8

Piriformis

Answer 8

Origin- anterior sacrum- anterior surface of the sacrotuberous ligament

Insertion- supermedial surface of the greater trochanter of the femur

Functions-
Laterally rotates, horizontally extends and medially rotates the thigh at the hip joint