Lecture 3: Gluteal Region Flashcards Preview

04. MSK Exam 2 Final > Lecture 3: Gluteal Region > Flashcards

Flashcards in Lecture 3: Gluteal Region Deck (60)
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1

What are the PIN structures?

1. Pudendal Nerve

2. Internal Pudendal Artery

3. Nerve to Obturator Internus

2

Tensor Fascia Lata​ Muscle

What are its attachments?

Origin: ASIS

Insertion: IT Tract and Lateral Condyle of Tibia

3

What Nerve Roots supply the Superior Cluneal Nerve?

Dorsal Rami of L1-L3

4

What structures exit the Greater Sciatic Foramen?

Nerves:

  • Sciatic Nerve
  • Superior Gluteal Nerve
  • Inferior Gluteal Nerve
  • Pudendal Nerve
  • Posterior Femoral Cutaneous N.
  • Nerve to Quadratus Femoris
  • Nerve to Obturator Internes

Vessels

  • Superior Gluteal Artery and Vein
  • Inferior Gluteal Artery and Vein
  • Internal Pudendal Artery and Vein

Piriformis Muscle

5

Gluteus Medius Muscle

What is its innervation and blood supply?

Innervation: Superior Gluteal Nerve (L5, S1)

Blood Supply: Deep Branch of Superior Gluteal Artery

6

What muscles abduct and medially rotate thigh?

1. Gluteus Medius Muscle

2. Gluteus Minimus Muscle

3. Tensor Fascia Lata Muscle

7

Superior Gemelli Muscle

What is its innervation and blood supply?

Innervation: Nerve to Obturator Internus

Blood Supply: Inferior Gluteal Artery

8

Gluteus Maximus Muscle

What is its innervation and blood supply?

Innervation: Inferior Gluteal Nerve (L5-S2)

Blood Supply: Superficial Branch of Superior Gluteal Artery and Inferior Gluteal Artery

9

How does the lower extremity present when the femur (head or neck) is posteriorly dislocated?

Shortened and internally rotated

10

Quadratus Femoris Muscle

What is its attachments?

Origin: Lateral Border of Ischial Tuberosity

Insertion: Quadrate Tubercle on Femur

11

What is the Trendelenburg Sign (Duchenne's Limp)?

Lesion of Superior Gluteal Nerve that leads to weakness of Gluteus Medius and Minimus muscles 

-Pelvis drops on opposite side of injury

-Foot cannot go into swing phase

12

Gluteus Medius Muscle

What is its action?

1. Abducts thigh

2. Medially rotate thigh

3. Keeps hip level when ipsilateral limb is weight-bearing and advancing the opposite limb during the swing phase

13

Inferior Gemelli Muscle

What is its action?

1. Lateral Rotation of Extended Thigh

2. Abduct Flexed Thigh 

14

What structures go through both Greater and Lesser Sciatic Foramen?

  • Pudendal Nerve
  • Internal Pudendal Artery and Vein
  • Nerve to Obturator Internus

Basically PIN Structures

15

Piriformis Muscle

What is its innervation and blood supply?

 

Innervation: Nerve to Piriformis (Branches of anterior rami of S1, S2)

Blood Supply: Superior and Inferior Gluteal Arteries

16

What ligament do the PIN structures run underneath?

Sacrotuberous Ligament

17

Gluteus Minimus Muscle

What is its innervation and blood supply?

Innervation: Superior Gluteal Nerve (L5, S1)

Blood Supply: Deep Branch of Superior Gluteal Artery

18

The nerve that innervates the Obturator Internus also innervates what other muscle?

The Superior Gemellus

19

Gluteus Medius Muscle

What are its attachments?

Origin: External Surface of Ilium between Anterior and Inferior Gluteal Lines

Insertion: Lateral Surface of Greater Trochanter of Femur

20

What muscles are supplied by the Inferior Gluteal Artery?

Gluteus Maximus

Small Lateral Rotators

Superior Hamstrings

21

Obturator Internus Muscle

What is its action?

1. Laterally Rotation of Extended Thigh

2. Abducts flexed thigh

3. Steady femoral head in acetabulum

22

What nerve roots supply the Inferior Gluteal Nerve?

L5-S2

23

What structure can be damaged in some people when the Ligament of the Head of the Femur is damaged?

A Branch of the Obturator Nerve

24

What structures enter the Lesser Sciatic Foramen?

  • Tendon of Obturator Internus Muscle
  • Pudendal Nerve 
  • Internal Pudendal Artery and Vein
  • Nerve to Obturator Internus

25

What would happen if the superior or medial cluneal nerves are impinged?

Nerve impingement in Lumbar Spine

-Can result in pain over distribution of cluneal nerves

26

Quadratus Femoris Muscle

What is its action?

Lateral Rotation of Thigh 

27

Piriformis Muscle

What is its action?

 

1. External Rotation of Thigh

2. Abduction of Flexed thigh 

3. Stabilize Femoral Head in Acetabulum

 

28

Superior Gemelli Muscle

What is its attachments?

Origin: Ischial Spine

Insertion: Medial Surface of Greater Trochanter of Femur

29

Inferior Gemelli Muscle

What is its innervation and blood supply?

Innervation: Nerve to Quadratus Femoris (L5, S1)

Blood Supply: Inferior Gluteal Artery

30

The nerve that innervates the Quadratus Femoris also innervates what other muscle?

The Inferior Gemellus