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SHB Exam 2 > Glut + post thigh > Flashcards

Glut + post thigh Flashcards

1
Q

Obturator internus m: OIIA?

A

O: Innter obturator membrane
I: Medial greater trochanter

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

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2
Q

Gemellus superior m: OIIA?

A

O: Ischial spine
I: Medial greater trochanter

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

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3
Q

Gemellus inferior m: OIIA?

A

O: Ischial tuberosity
I: Medial greater trochanter

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

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4
Q

Piriformis m: OIIA?

A

O: lower sacrum
I: Medial greater trochanter

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

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5
Q

What vessels come out above the piriformis? Below

A

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

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6
Q

Gluteus minimus m: OIIA?

A

O: Outer, superior ilium
I: Anterior greater trochanter

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

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7
Q

Gluteus medius m: OIIA?

A

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

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8
Q

Quadratus femoris m: OIIA?

A

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

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

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9
Q

Gluteus maximus m: OIIA?

A

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)

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10
Q

What is Driver’s thigh?

A

Neuralgia caused by pressure on the gluteal nerves

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11
Q

Tensor fascia lata m: OIIA?

A

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

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12
Q

What nerve roots make up the sciatic n.

A

L4, L5, S1, S2, S3

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13
Q

What are some consequences of cutting the sciatic nerve?

A
  • Everything below the knee is paralyzed

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

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14
Q

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

A

Superolateral quadrant

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15
Q

What nn. make up the sciatic n?

A

Common peroneal n. and tibial n.

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16
Q

What is a more common cause of sciatica?

A

Prolapse of the disc at L4/L5

17
Q

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

A
  • Posterior femoral cutaneous n.

- Runs next to sciatic n.

18
Q

What travels through Alcock’s canal?

A

Pudendal n. and internal pudendal a.

(AKA pudendal canal)

19
Q

What nerve roots make up the pudendal n?

A

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

20
Q

*What does the pudendal n. split into?

A
  • Inferior rectal n.
  • Dorsal nerve of the penis or clitoris
  • Perineal n.
21
Q

What is the function of the perineal n?

A

Supplies all mm. of the perineum and does some sensation

22
Q

What artery runs with the pudendal n?

A

Internal pudendal a.

23
Q

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

A
  1. Course under the sacrospinous ligament

2. Course over the sacrotuberous ligament

24
Q

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

A

Fascia of the obturator internus.

25
Q

Biceps femoris, long head m: OIIA?

A

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.

26
Q

Biceps femoris, short head m: OIIA?

A

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

27
Q

Semimembranosus m: OIIA?

A

O: Ischial tuberosity
I: Medial condyle of tibia

I: Sciatic n., tibial portion
A: Flexes knee, extends hip, medial rotation.

28
Q

Semitendonosus m: OIIA?

A

O: Ischial tuberosity
I: Upper medial shaft of tibia

I: Sciatic n., tibial portion
A: Flexes knee, extends hip, medial rotation.

29
Q

How is the cruciate anastamosis helpful during a blockage?

A

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

30
Q

What is the route of blood in the cruciate anastomosis?

A

Just remember FILM:

  • First perforating of profunda femoris a.
  • Inferior gluteal a.
  • Lateral femoral circumflex a.
  • Medial femoral circumflex a.
31
Q

How do you see Tredelenburg’s sign?

What is causing it and what m. is primarily affected?

A
  • Someone’s pelvis tilts towards unaffected side while ambulating
  • Superior gluteal n. injury, primarily affecting the gluteus medius m.
32
Q

What mm. are part of the hamgstrings group?

A
  • Semitendonosus
  • Semimembranosus
  • Biceps femoris

SHB Exam 2 (17 decks)

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