Gluteal Region and Posterior Thigh

Question 1

Obturator Internus Innervation

Answer 1

Nerve to the Obturator Internus

Question 2

Obturator Internus Action

Answer 2

Laterally rotates and stabilizes thigh

Question 3

What cuts across the center of the obturator interns?

Answer 3

Arcus Tendineus

Question 4

What attaches to the arcus tendineus as it origin?

Answer 4

Levator Ani

Question 5

Gemellus Superior Innervation

Answer 5

Nerve to the Obturator Internus

Question 6

Gemellus Superior Action

Answer 6

Laterally rotates and stabilizes thigh

Question 7

Gemellus Inferior Innervation

Answer 7

Nerve to the Quadratus Femoris

Question 8

Gemellus Inferior Action

Answer 8

Laterally rotates and stabilizes thigh

Question 9

What vessels loop around the sacrospinous ligament?

Answer 9

Pudendal Vessels

Question 10

Piriformis Innervation

Answer 10

Nerve to Piriformis (Ventral Rami of S1 and S2

Question 11

Piriformis Action

Answer 11

Laterally rotates and stabilizes thigh

Question 12

What nerve sits on the anterior side of the piriformis?

Answer 12

Sciatic Nerve

Question 13

Gluteus Minimus Innervation

Answer 13

Superior Gluteal Nerve

Question 14

Gluteus Minimus Action

Answer 14

Abducts and medially rotates thigh.

Tilts pelvis on walking.

Question 15

Gluteus Medius Innervation

Answer 15

Superior Gluteal Nerve

Question 16

Gluteus Medius Action

Answer 16

Abducts and medially rotates thigh. Tilts pelvis on walking.

Question 17

Gluteus Maximus Innervation

Answer 17

Inferior Gluteal Nerve

Question 18

Gluteus Maximus Action

Answer 18

Extends and laterally rotates hip and aids in knee extension

Question 19

What can be observed when the gluteus medius is injured?

Answer 19

The pelvis will tilt towards the uninjured side

Question 20

Tensor Fascia Lata Innervation

Answer 20

Superior Gluteal Nerve

Question 21

Tensor Fascia Lata Action

Answer 21

Maintains knee extended and abducts the thigh

Question 22

Biceps Femoris Innervation

Answer 22

Long Head: Tibial Part of Sciatic Nerve

Short Head: Common Peroneal Part of Sciatic Nerve

Question 23

Biceps Femoris Action

Answer 23

Flexes and laterally rotates the knee

Long head also extends the hip

Question 24

Semimembranosus Innervation

Answer 24

Tibial Part of the Sciatic Nerve

Question 25

Semimembranosus Action

Answer 25

Flexes and medially rotates the knee. Also extends the hip.

Question 26

Semitendinosus Innervation

Answer 26

Tibial Part of the Sciatic Nerve

Question 27

Semitendinosus Action

Answer 27

Flexes and medially rotates the knee. Also extends the hip.

Question 28

Where does the semitendinosus lie?

Answer 28

Lies on top of the semimembranosus

Question 29

What does damage to the common peroneal part of the sciatic cause?

Answer 29

Foot Drop | Think of the radial nerve in the arm leading to wrist drop

Question 30

What does the femoral artery become after the first perforating of the deep femoral artery?

Answer 30

Popliteal Artery

Question 31

What are the four arteries in the cruciate anastamosis?

Answer 31

Medial Femoral Circumflex Artery Inferior Gluteal Artery Lateral Femoral Circumflex Artery First Perforating of the Deep Femoral Artery FILM or MILF

Question 32

What is the tredelenberg sign?

Answer 32

Tilting due to injury of the gluteus medius

Question 33

What are the muscles of the gluteal region?

Answer 33

``` Gluteus Minimus Gluteus Medius Gluteus Maxiumus Superior Gemellus Inferior Gemellus Obturator Internus Quadratus Femorus Tensor Fascia Lata Piriformis ```

Question 34

What is the blood supply to the gluteal region?

Answer 34

Superior Gluteal Artery (branch posterior division of the internal iliac) Inferior Gluteal Artery (branch of the internal iliac)

Question 35

What are the muscles of the posterior thigh?

Answer 35

Semimembranosus Semitendinosus Biceps Femoris

Question 36

What is the blood supply of the posterior thigh?

Answer 36

Perforating Branches of the Profunda Femoris

Question 37

What are the boundaries of the popliteal fossa?

Answer 37

Upper medial: semimembranosus and semitendinosus Upper lateral: Biceps femoris m. Lower: Two heads of the gastrocnemius Floor: Femur and articular capsule of the knee joint

Question 38

What are the contents of the popliteal fossa?

Answer 38

Superficial to Deep: - Sciatic Nerve - Popliteal Vein - Popliteal Artery