hip muscles

Question 1

What is the origin, insertion, innervation and action of Psoas major

Answer 1

Origin: L1-L5 vertebrae
Insert: lesser trochanter of femur
Nerve: lumbar plexus
Action: flexion and lateral rotation at hip

Question 2

What is the origin, insertion, innervation and action of Iliacus

Answer 2

i. Origin: iliac fossa
ii. Insert: lesser trochanter of femur
iii. Nerve: femoral nerve
iv. Action: flexion at hip

Question 3

What is the origin, insertion, innervation and action of Gluteus Maximus

Answer 3

i. Origin: ilium and sacrum
ii. Insert: superficial ¾ on iliotibial tract, deep ¼ on the gluteal tuberosity of the femur
iii. Nerve: inferior gluteal nerve
iv. Action: lateral rotation and extension at hip

Question 4

What is the origin, insertion, innervation and action of Gluteus Medius

Answer 4

i. Origin: posterior aspect of ilium
ii. Insert: greater trochanter of femur
iii. Nerve: superior gluteal nerve
iv. Action: medial rotation and abduction

Question 5

What is the origin, insertion, innervation and action of Gluteus Minimus

Answer 5

i. Origin: ilium
ii. Insert: greater trochanter of the femur
iii. Nerve: superior gluteal nerve
iv. Action: abduction and medial rotation

Question 6

What is the origin, insertion, innervation and action of Tensor Fascia Lata

Answer 6

i. Origin: anterior superior iliac spine
ii. Insert: iliotibial tract
iii. Nerve: superior gluteal nerve
iv. Action: abduction, flexion, and medial rotation at hip

Question 7

What is the origin, insertion, innervation and action of Piriformis

Answer 7

i. Origin: Sacrum
ii. Insert: greater trochanter of femur
iii. Nerve: sacral plexus
iv. Action: lateral rotation at hip

Question 8

What is the origin, insertion, innervation and action of Obturator internus

Answer 8

i. Origin: obturator membrane and its bony boundaries
ii. Insert: greater trochanter of femur
iii. Nerve: sacral plexus
iv. Action: lateral rotation at hip

Question 9

What is the origin, insertion, innervation and action of Superior Gemellus

Answer 9

i. Origin: ischial spine
ii. Insert: greater trochanter of femur
iii. Nerve: sacral plexus
iv. Action: lateral rotation at hip

Question 10

What is the origin, insertion, innervation and action of the Inferior Gemellus

Answer 10

i. Origin: ischial tuberosity
ii. Insert: greater trochanter of femur
iii. Nerve: sacral plexus
iv. Action: lateral rotation at hip

Question 11

What is the origin, insertion, innervation and action of Quadratus Femoris

Answer 11

i. Origin: ischial tuberosity
ii. Insert: proximal end of femur
iii. Nerve: sacral plexus
iv. Action: lateral rotation at hip
v. Quadrangular shape