Pelvic Muscles COPY Flashcards

1
Q

What is the origin of Psoas Major ?

A

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

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2
Q

Innervation of Psoas Major?

A

Direct branches of anterior rami L1-4

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3
Q

Function of Psoas Major?

A

Hip Flexion, Trunk flexion and lateral flexion of Trunk.

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4
Q

Insertion of Psoas Major?

A

Lesser Trochnter of Femur as Iliopsoas tendon.

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5
Q

Origin of Iliacus ?

A

Iliac fossa and crest, ala of the sacrum.

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6
Q

Innervation of Iliacus ?

A

Femoral Nerve (L2,L3)

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7
Q

Where do Psoas and Iliacus join to create Iliopsoas ?

A

Iliac fossa.

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8
Q

What is the insertion of the Iliacus ?

A

Lesser Trochanter of femur as iliopsoas.

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9
Q

What is the funtion of Iliacus ?

A

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

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10
Q

Origin of Obturator Externus ?

A

Outer surface of obturator membrane and inferior pubic rami.

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11
Q

Insertion of Obturator Externus ?

A

Trochanteric fossa of Femur.

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12
Q

Origin of Obturator Internus ?

A

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

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13
Q

Insertion of the Obturator Internus ?

A

Medial surface of the greater trochanter above the trochanteric fossa.

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14
Q

Insertion of the Obturator Internus ?

A

Medial surface of the greater trochanter above the trochanteric fossa.

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15
Q

Function of Obturator Internus ?

A

Lateral rotation of hip joint.

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16
Q

Innervation of Obturator Internus ?

A

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

17
Q

Origin of Piriformis ?

A

Pelvic surface of sacrum.

18
Q

Insertion of Piriformis ?

A

Superior border of the greater trochanter of the Femur.

19
Q

Innervation of Piriformis ?

A

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

20
Q

Function of Piriformis ?

A

Lateral Rotation of Hip.

21
Q

What muscles make up the pelvic diaphragm ?

A

Levator Ani and Coccygeus.

22
Q

What muscles make up Levator ani ?

A

Ilioccygeus, Pubococcygeus and puborectalis.

23
Q

Origin of Ilioccygeus ?

A

Ischial spine and the fascia of the obturator internus muscle.

24
Q

insertion of Ilioccygeus ?

A

Anococcygeal ligament and the coccyx.

25
Function of the Ilioccygeus ?
Supports the pevlic viscera.
26
Innervation of Ilioccygeus ?
Nerve to levator ani muscle ( S3,S4) and Pudendal | Nerve.
27
Origin of Pubococcygeus ?
Posterior Surface of Pubic ramus.
28
Insertion of Poubococcygeus?
The Coccyx.
29
What are the medial fibres of Pubococcygeus called in males ?
Levator Prostatae.
30
What are the most medial fibres of Pubococcygeus called in females ?
Pubovaginalis.
31
What is the third and largest division of Pubococcygeus called ?
Puborectalis.
32
What is the function of Puborectalis ?
Too act as a sling around the rectum to help maintain faecal continence.
33
Innervation of Puborectalis ?
Pudendal nerve (S2-S4) also Nerver to levator ani (S4).