Glut + post thigh

Question 1

Obturator internus m: OIIA?

Answer 1

O: Innter obturator membrane
I: Medial greater trochanter

I: Nerve to obturator internus
A: Lateral rotation, stabilizes thigh

Question 2

Gemellus superior m: OIIA?

Answer 2

O: Ischial spine
I: Medial greater trochanter

I: Nerve to obturator internus
A: Lateral rotation, stabilizes thigh

Question 3

Gemellus inferior m: OIIA?

Answer 3

O: Ischial tuberosity
I: Medial greater trochanter

I: Nerve to quadratus femoris
A: Lateral rotation, stabilizes thigh

Question 4

Piriformis m: OIIA?

Answer 4

O: lower sacrum
I: Medial greater trochanter

I: Nerve to piriformis
A: Lateral rotation, stabilizes thigh

Question 5

What vessels come out above the piriformis? Below

Answer 5

Above: Superior gluteal n. or a.
Below: Inferior gluteal n. or a. + sciatic n.

Question 6

Gluteus minimus m: OIIA?

Answer 6

O: Outer, superior ilium
I: Anterior greater trochanter

I: Superior gluteal n.
A: Abducts and medially rotates thigh; tilts pelvis while walking

Question 7

Gluteus medius m: OIIA?

Answer 7

O: Outer ilium, below minimus’s origin
I: Anterior greater trochanter

I: Superior gluteal n.
A: Abducts and medially rotates thigh; tilts pelvis while walking

Question 8

Quadratus femoris m: OIIA?

Answer 8

O: Ischial tuberosity
I: Quadrate tubercle of femur (below lesser trochanter)

I: Nerve to quadratus femoris
A: Lateral rotation, stabilizes hip

Question 9

Gluteus maximus m: OIIA?

Answer 9

O: Ilium, sacrum, sacrotuberous ligament
I: Gluteal tuberosity, IT tract

I: Inferior gluteal n.
A: Extends and laterally rotates hip; aids in knee extension via iliotibial tract
(kicks in while ascending stairs)

Question 10

What is Driver’s thigh?

Answer 10

Neuralgia caused by pressure on the gluteal nerves

Question 11

Tensor fascia lata m: OIIA?

Answer 11

O: Iliac crest
I: Iliotibial tract (ant surface of lateral condyle of femur, crosses knee joint)

I: Superior gluteal n.
A: Tenses a lotta fascia, maintains knee extension (assists gluteus maximus), some thigh abduction

Question 12

What nerve roots make up the sciatic n.

Answer 12

L4, L5, S1, S2, S3

Question 13

What are some consequences of cutting the sciatic nerve?

Answer 13

• Everything below the knee is paralyzed

- Sensation lost on lateral leg and both sides of the foot

Question 14

What quadrant of the butt should injections be made so as to avoid the sciatic nerve?

Answer 14

Superolateral quadrant

Question 15

What nn. make up the sciatic n?

Answer 15

Common peroneal n. and tibial n.

Question 16

What is a more common cause of sciatica?

Answer 16

Prolapse of the disc at L4/L5

Question 17

What n. provides sensation to back of thigh? What does it run next to?

Answer 17

• Posterior femoral cutaneous n.

- Runs next to sciatic n.

Question 18

What travels through Alcock’s canal?

Answer 18

Pudendal n. and internal pudendal a.

(AKA pudendal canal)

Question 19

What nerve roots make up the pudendal n?

Answer 19

S2, S3, S4 (keep the junk off the floor)

Question 20

*What does the pudendal n. split into?

Answer 20

• Inferior rectal n.
• Dorsal nerve of the penis or clitoris
• Perineal n.

Question 21

What is the function of the perineal n?

Answer 21

Supplies all mm. of the perineum and does some sensation

Question 22

What artery runs with the pudendal n?

Answer 22

Internal pudendal a.

Question 23

What is the course of the pudendal vessels, w/regard to the ligaments, as they enter the perineum?
(from medial view of inside hip)

Answer 23

1. Course under the sacrospinous ligament

2. Course over the sacrotuberous ligament

Question 24

What would you need to cut open to visualize Alcock’s canal?

Answer 24

Fascia of the obturator internus.

Question 25

Biceps femoris, long head m: OIIA?

Answer 25

O: Ischial tuberosity (crosses hip joint) I: Head of fibula mostly (crosses knee) I: Sciatic n, tibial portion A: Flexes knee, *extends hip. Some lateral rotation.

Question 26

Biceps femoris, short head m: OIIA?

Answer 26

O: Middle 1/3 of linea aspera, lateral supracondylar ridge of femur I: Head of fibula mostly (crosses knee) I: Sciatic n., common peroneal division A: Flexes knee. Some lateral rotation

Question 27

Semimembranosus m: OIIA?

Answer 27

O: Ischial tuberosity I: Medial condyle of tibia I: Sciatic n., tibial portion A: Flexes knee, extends hip, medial rotation.

Question 28

Semitendonosus m: OIIA?

Answer 28

O: Ischial tuberosity I: Upper medial shaft of tibia I: Sciatic n., tibial portion A: Flexes knee, extends hip, medial rotation.

Question 29

How is the cruciate anastamosis helpful during a blockage?

Answer 29

If there's a blockage b/w the femoral a. and external iliac a., blood can reach the popliteal artery by means of the anastomosis

Question 30

What is the route of blood in the cruciate anastomosis?

Answer 30

Just remember FILM: - First perforating of profunda femoris a. - Inferior gluteal a. - Lateral femoral circumflex a. - Medial femoral circumflex a.

Question 31

How do you see Tredelenburg's sign? | What is causing it and what m. is primarily affected?

Answer 31

- Someone's pelvis tilts towards unaffected side while ambulating - Superior gluteal n. injury, primarily affecting the gluteus medius m.

Question 32

What mm. are part of the hamgstrings group?

Answer 32

- Semitendonosus - Semimembranosus - Biceps femoris