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Anatomy: pelvis and perineum (based on Dave's notes only so far) > Pelvic muscles (dave's notes) > Flashcards

Pelvic muscles (dave's notes) Flashcards

1
Q

What is the origin of obturator internus?

A

The inner surface of the obturator membrane, the rim of the pubis and the ischium bordering it (what?)

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2
Q

What is the origin of piriformis?

A

S2,3,4 of the costotransverse bars of anterior ant sacrum between the sacral foramina

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3
Q

What three muscles constitute the pelvic floor?

A

Coccygeus: ischiococcygeus, levator ani: iliococcygeus, levator ani: pubococcygeus

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4
Q

What is the origin of coccygeus: ischiococcygeus?

A

The sacrospinous ligament and ischial spine

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5
Q

What is the origin of levator ani: iliococcygeus?

A

The posterior half of the white line and ischial spine

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6
Q

What is the origin of levator ani: pubococcygeus?

A

The anterior half of the white line and the posterior part of pubis

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7
Q

What is the insertion of obturator internus?

A

The middle part of the medial aspect of the greater trochanter of femur

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8
Q

What is the insertion of piriformis?

A

The anterior part of the medial aspect of the greater trochanter

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9
Q

What is the insertion of coccygeus: ischiococcygeus?

A

The anococcygeal body and coccyx

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10
Q

What is the insertion of levator ani: iliococcygeus?

A

The anococcygeal body

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11
Q

What is the insertion of levator ani: pubococcygeus?

A

The anococcygeal body

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12
Q

What is the action of obturator internus?

A

Laterally rotates and stabilises the hip

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13
Q

What is the action of piriformis?

A

Laterally rotates and stabilises the hip

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14
Q

What is the action of coccygeus: ischiococcygeus?

A

Supports pelvic viscera

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15
Q

What is the action of levator ani: iliococcygeus?

A

Supports pelvic viscera

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16
Q

What is the action of levator ani: pubococcygeus?

A

Supports pelvic viscera

17
Q

What is the nerve supply to obturator internus?

A

The nerve of obturator internus (L5, S1,2)

18
Q

What is the nerve supply to piriformis?

A

The tibial nerve (S1,2)

19
Q

What is the nerve supply to coccygeus: ischiococcygeus

A

S4,5

20
Q

What is the nerve supply to levator ani: iliococcygeus

A

S3,4

21
Q

What is the nerve supply to levator ani: pubococcygeus

A

S3,4

22
Q

What is found on the surface of piriformis?

A

Emerging nerves and plexus lies on the muscle. Piriformis (or the nerves??) run transversely to the greater sciatic foramen

23
Q

What is notable about the attachments of levator ani: iliococcygeus?

A

It does not attach to the ilium

Why is this notable??

Anatomy: pelvis and perineum (based on Dave's notes only so far) (29 decks)

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