Pelvic Muscles COPY

Question 1

What is the origin of Psoas Major ?

Answer 1

Anterior surfaces and lower borders of the transverse processes of T12- L5

Question 2

Innervation of Psoas Major?

Answer 2

Direct branches of anterior rami L1-4

Question 3

Function of Psoas Major?

Answer 3

Hip Flexion, Trunk flexion and lateral flexion of Trunk.

Question 4

Insertion of Psoas Major?

Answer 4

Lesser Trochnter of Femur as Iliopsoas tendon.

Question 5

Origin of Iliacus ?

Answer 5

Iliac fossa and crest, ala of the sacrum.

Question 6

Innervation of Iliacus ?

Answer 6

Femoral Nerve (L2,L3)

Question 7

Where do Psoas and Iliacus join to create Iliopsoas ?

Answer 7

Iliac fossa.

Question 8

What is the insertion of the Iliacus ?

Answer 8

Lesser Trochanter of femur as iliopsoas.

Question 9

What is the funtion of Iliacus ?

Answer 9

Felxion and external rotation of the hip joint, Raises the trunk from supine position and ipsilateral bending of the trunk.

Question 10

Origin of Obturator Externus ?

Answer 10

Outer surface of obturator membrane and inferior pubic rami.

Question 11

Insertion of Obturator Externus ?

Answer 11

Trochanteric fossa of Femur.

Question 12

Origin of Obturator Internus ?

Answer 12

Inner surface of the Obturator membrane and the margin of the obturator foramen.

Question 13

Insertion of the Obturator Internus ?

Answer 13

Medial surface of the greater trochanter above the trochanteric fossa.

Question 14

Insertion of the Obturator Internus ?

Answer 14

Medial surface of the greater trochanter above the trochanteric fossa.

Question 15

Function of Obturator Internus ?

Answer 15

Lateral rotation of hip joint.

Question 16

Innervation of Obturator Internus ?

Answer 16

Nerve to Obturator internus ( direct branches from sacral plexus L5,S1).

Question 17

Origin of Piriformis ?

Answer 17

Pelvic surface of sacrum.

Question 18

Insertion of Piriformis ?

Answer 18

Superior border of the greater trochanter of the Femur.

Question 19

Innervation of Piriformis ?

Answer 19

Nerve to Piriformis ( Direct branches from Sacral plexus S1,S2).

Question 20

Function of Piriformis ?

Answer 20

Lateral Rotation of Hip.

Question 21

What muscles make up the pelvic diaphragm ?

Answer 21

Levator Ani and Coccygeus.

Question 22

What muscles make up Levator ani ?

Answer 22

Ilioccygeus, Pubococcygeus and puborectalis.

Question 23

Origin of Ilioccygeus ?

Answer 23

Ischial spine and the fascia of the obturator internus muscle.

Question 24

insertion of Ilioccygeus ?

Answer 24

Anococcygeal ligament and the coccyx.

Question 25

Function of the Ilioccygeus ?

Answer 25

Supports the pevlic viscera.

Question 26

Innervation of Ilioccygeus ?

Answer 26

Nerve to levator ani muscle ( S3,S4) and Pudendal

Nerve.

Question 27

Origin of Pubococcygeus ?

Answer 27

Posterior Surface of Pubic ramus.

Question 28

Insertion of Poubococcygeus?

Answer 28

The Coccyx.

Question 29

What are the medial fibres of Pubococcygeus called in males ?

Answer 29

Levator Prostatae.

Question 30

What are the most medial fibres of Pubococcygeus called in females ?

Answer 30

Pubovaginalis.

Question 31

What is the third and largest division of Pubococcygeus called ?

Answer 31

Puborectalis.

Question 32

What is the function of Puborectalis ?

Answer 32

Too act as a sling around the rectum to help maintain faecal continence.

Question 33

Innervation of Puborectalis ?

Answer 33

Pudendal nerve (S2-S4) also Nerver to levator ani (S4).